Merge commit 'c28d35783173c0b09ca1f7e29d2565b1602f733d' Changes: https://github.com/eggert/tz/blob/2021d/NEWS MFC after: 3 days
5469 lines
194 KiB
Plaintext
5469 lines
194 KiB
Plaintext
News for the tz database
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Release 2021d - 2021-10-15 13:48:18 -0700
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Briefly:
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Fiji suspends DST for the 2021/2022 season.
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'zic -r' marks unspecified timestamps with "-00".
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Changes to future timestamps
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Fiji will suspend observance of DST for the 2021/2022 season.
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Assume for now that it will return next year. (Thanks to Jashneel
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Kumar and P Chan.)
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Changes to code
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'zic -r' now uses "-00" time zone abbreviations for intervals
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with UT offsets that are unspecified due to -r truncation.
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This implements a change in draft Internet RFC 8536bis.
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Release 2021c - 2021-10-01 14:21:49 -0700
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Briefly:
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Revert most 2021b changes to 'backward'.
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Fix 'zic -b fat' bug in pre-1970 32-bit data.
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Fix two Link line typos.
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Distribute SECURITY file.
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This release is intended as a bugfix release, to fix compatibility
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problems and typos reported since 2021b was released.
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Changes to Link directives
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Revert almost all of 2021b's changes to the 'backward' file,
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by moving Link directives back to where they were in 2021a.
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Although 'zic' doesn't care which source file contains a Link
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directive, some downstream uses ran into trouble with the move.
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(Problem reported by Stephen Colebourne for Joda-Time.)
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Fix typo that linked Atlantic/Jan_Mayen to the wrong location
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(problem reported by Chris Walton).
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Fix 'backzone' typo that linked America/Virgin to the wrong
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location (problem reported by Michael Deckers).
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Changes to code
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Fix a bug in 'zic -b fat' that caused old timestamps to be
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mishandled in 32-bit-only readers (problem reported by Daniel
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Fischer).
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Changes to documentation
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Distribute the SECURITY file (problem reported by Andreas Radke).
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Release 2021b - 2021-09-24 16:23:00 -0700
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Briefly:
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Jordan now starts DST on February's last Thursday.
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Samoa no longer observes DST.
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Merge more location-based Zones whose timestamps agree since 1970.
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Move some backward-compatibility links to 'backward'.
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Rename Pacific/Enderbury to Pacific/Kanton.
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Correct many pre-1993 transitions in Malawi, Portugal, etc.
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zic now creates each output file or link atomically.
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zic -L no longer omits the POSIX TZ string in its output.
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zic fixes for truncation and leap second table expiration.
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zic now follows POSIX for TZ strings using all-year DST.
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Fix some localtime crashes and bugs in obscure cases.
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zdump -v now outputs more-useful boundary cases.
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tzfile.5 better matches a draft successor to RFC 8536.
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A new file SECURITY.
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This release is prompted by recent announcements by Jordan and Samoa.
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It incorporates many other changes that had accumulated since 2021a.
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However, it omits most proposed changes that merged all Zones
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agreeing since 1970, as concerns were raised about doing too many of
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these changes at once. It does keeps some of these changes in the
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interest of making tzdb more equitable one step at a time; see
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"Merge more location-based Zones" below.
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Changes to future timestamps
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Jordan now starts DST on February's last Thursday.
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(Thanks to Steffen Thorsen.)
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Samoa no longer observes DST. (Thanks to Geoffrey D. Bennett.)
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Changes to zone name
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Rename Pacific/Enderbury to Pacific/Kanton. When we added
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Enderbury in 1993, we did not know that it is uninhabited and that
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Kanton (population two dozen) is the only inhabited location in
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that timezone. The old name is now a backward-compatility link.
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Changes to past timestamps
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Correct many pre-1993 transitions, fixing entries originally
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derived from Shanks, Whitman, and Mundell. The fixes include:
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- Barbados: standard time was introduced in 1911, not 1932; and
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DST was observed in 1942-1944
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- Cook Islands: In 1899 they switched from east to west of GMT,
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celebrating Christmas for two days. They (and Niue) switched
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to standard time in 1952, not 1901.
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- Guyana: corrected LMT for Georgetown; the introduction of
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standard time in 1911, not 1915; and corrections to 1975 and
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1992 transitions
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- Kanton: uninhabited before 1937-08-31
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- Niue: only observed -11:20 from 1952 through 1964, then went to
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-11 instead of -11:30
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- Portugal: DST was observed in 1950
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- Tonga: corrected LMT; the introduction of standard time in 1945,
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not 1901; and corrections to the transition from +12:20 to +13
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in 1961, not 1941
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Additional fixes to entries in the 'backzone' file include:
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- Enderbury: inhabited only 1860/1885 and 1938-03-06/1942-02-09
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- The Gambia: 1933 and 1942 transitions
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- Malawi: several 1911 through 1925 transitions
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- Sierra Leone: several 1913 through 1941 transitions, and DST
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was NOT observed in 1957 through 1962
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(Thanks to P Chan, Michael Deckers, Alexander Krivenyshev and
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Alois Treindl.)
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Merge more location-based Zones whose timestamps agree since 1970,
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as pre-1970 timestamps are out of scope. This is part of a
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process that has been ongoing since 2013. This does not affect
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post-1970 timestamps, and timezone historians who build with 'make
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PACKRATDATA=backzone' should see no changes to pre-1970 timestamps.
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When merging, keep the most-populous location's data, and move
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data for other locations to 'backzone' with a backward
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link in 'backward'. For example, move America/Creston data to
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'backzone' with a link in 'backward' from America/Phoenix because
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the two timezones' timestamps agree since 1970; this change
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affects some pre-1968 timestamps in America/Creston because
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Creston and Phoenix disagreed before 1968. The affected Zones
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are Africa/Accra, America/Atikokan, America/Blanc-Sablon,
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America/Creston, America/Curacao, America/Nassau,
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America/Port_of_Spain, Antarctica/DumontDUrville, and
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Antarctica/Syowa.
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Changes to maintenance procedure
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The new file SECURITY covers how to report security-related bugs.
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Several backward-compatibility links have been moved to the
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'backward' file. These links, which range from Africa/Addis_Ababa
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to Pacific/Saipan, are only for compatibility with now-obsolete
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guidelines suggesting an entry for every ISO 3166 code.
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The intercontinental convenience links Asia/Istanbul and
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Europe/Nicosia have also been moved to 'backward'.
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Changes to code
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zic now creates each output file or link atomically,
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possibly by creating a temporary file and then renaming it.
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This avoids races where a TZ setting would temporarily stop
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working while zic was installing a replacement file or link.
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zic -L no longer omits the POSIX TZ string in its output.
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Starting with 2020a, zic -L truncated its output according to the
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"Expires" directive or "#expires" comment in the leapseconds file.
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The resulting TZif files omitted daylight saving transitions after
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the leap second table expired, which led to far less-accurate
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predictions of times after the expiry. Although future timestamps
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cannot be converted accurately in the presence of leap seconds, it
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is more accurate to convert near-future timestamps with a few
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seconds error than with an hour error, so zic -L no longer
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truncates output in this way.
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Instead, when zic -L is given the "Expires" directive, it now
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outputs the expiration by appending a no-change entry to the leap
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second table. Although this should work well with most TZif
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readers, it does not conform to Internet RFC 8536 and some pickier
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clients (including tzdb 2017c through 2021a) reject it, so
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"Expires" directives are currently disabled by default. To enable
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them, set the EXPIRES_LINE Makefile variable. If a TZif file uses
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this new feature it is marked with a new TZif version number 4,
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a format intended to be documented in a successor to RFC 8536.
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zic -L LEAPFILE -r @LO no longer generates an invalid TZif file
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that omits leap second information for the range LO..B when LO
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falls between two leap seconds A and B. Instead, it generates a
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TZif version 4 file that represents the previously-missing
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information.
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The TZif reader now allows the leap second table to begin with a
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correction other than -1 or +1, and to contain adjacent
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transitions with equal corrections. This supports TZif version 4.
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The TZif reader now lets leap seconds occur less than 28 days
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apart. This supports possible future TZif extensions.
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Fix bug that caused 'localtime' etc. to crash when TZ was
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set to a all-year DST string like "EST5EDT4,0/0,J365/25" that does
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not conform to POSIX but does conform to Internet RFC 8536.
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Fix another bug that caused 'localtime' etc. to crash when TZ was
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set to a POSIX-conforming but unusual TZ string like
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"EST5EDT4,0/0,J365/0", where almost all the year is DST.
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Fix yet another bug that caused 'localtime' etc. to mishandle slim
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TZif files containing leap seconds after the last explicit
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transition in the table, or when handling far-future timestamps
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in slim TZif files lacking leap seconds.
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Fix localtime misbehavior involving positive leap seconds.
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This change affects only behavior for "right" system time,
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which contains leap seconds, and only if the UT offset is
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not a multiple of 60 seconds when a positive leap second occurs.
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(No such timezone exists in tzdb, luckily.) Without the fix,
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the timestamp was ambiguous during a positive leap second.
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With the fix, any seconds occurring after a positive leap second
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and within the same localtime minute are counted through 60, not
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through 59; their UT offset (tm_gmtoff) is the same as before.
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Here is how the fix affects timestamps in a timezone with UT
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offset +01:23:45 (5025 seconds) and with a positive leap second at
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1972-06-30 23:59:60 UTC (78796800):
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time_t without the fix with the fix
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78796800 1972-07-01 01:23:45 1972-07-01 01:23:45 (leap second)
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78796801 1972-07-01 01:23:45 1972-07-01 01:23:46
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...
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78796815 1972-07-01 01:23:59 1972-07-01 01:23:60
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78796816 1972-07-01 01:24:00 1972-07-01 01:24:00
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Fix an unlikely bug that caused 'localtime' etc. to misbehave if
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civil time changes a few seconds before time_t wraps around, when
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leap seconds are enabled.
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Fix bug in zic -r; in some cases, the dummy time type after the
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last time transition disagreed with the TZ string, contrary to
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Internet RFC 8563 section 3.3.
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Fix a bug with 'zic -r @X' when X is a negative leap second that
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has a nonnegative correction. Without the fix, the output file
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was truncated so that X appeared to be a positive leap second.
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Fix a similar, even-less-likely bug when truncating at a positive
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leap second that has a nonpositive correction.
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zic -r now reports an error if given rolling leap seconds, as this
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usage has never generally worked and is evidently unused.
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zic now generates a POSIX-conforming TZ string for TZif files
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where all-year DST is predicted for the indefinite future.
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For example, for all-year Eastern Daylight Time, zic now generates
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"XXX3EDT4,0/0,J365/23" where it previously generated
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"EST5EDT,0/0,J365/25" or "". (Thanks to Michael Deckers for
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noting the possibility of POSIX conformance.)
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zic.c no longer requires sys/wait.h (thanks to spazmodius for
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noting it wasn't needed).
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When reading slim TZif files, zdump no longer mishandles leap
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seconds on the rare platforms where time_t counts leap seconds,
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fixing a bug introduced in 2014g.
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zdump -v now outputs timestamps at boundaries of what localtime
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and gmtime can represent, instead of the less-useful timestamps
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one day after the minimum and one day before the maximum.
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(Thanks to Arthur David Olson for prototype code, and to Manuela
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Friedrich for debugging help.)
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zdump's -c and -t options are now consistently inclusive for the
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lower time bound and exclusive for the upper. Formerly they were
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inconsistent. (Confusion noted by Martin Burnicki.)
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Changes to build procedure
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You can now compile with -DHAVE_MALLOC_ERRNO=0 to port to
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non-POSIX hosts where malloc doesn't set errno.
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(Problem reported by Jan Engelhardt.)
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Changes to documentation
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tzfile.5 better matches a draft successor to RFC 8536
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<https://datatracker.ietf.org/doc/draft-murchison-rfc8536bis/01/>.
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Release 2021a - 2021-01-24 10:54:57 -0800
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Changes to future timestamps
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South Sudan changes from +03 to +02 on 2021-02-01 at 00:00.
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(Thanks to Steffen Thorsen.)
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Release 2020f - 2020-12-29 00:17:46 -0800
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Change to build procedure
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'make rearguard_tarballs' no longer generates a bad rearguard.zi,
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fixing a 2020e bug. (Problem reported by Deborah Goldsmith.)
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Release 2020e - 2020-12-22 15:14:34 -0800
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Briefly:
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Volgograd switches to Moscow time on 2020-12-27 at 02:00.
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Changes to future timestamps
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Volgograd changes time zone from +04 to +03 on 2020-12-27 at 02:00.
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(Thanks to Alexander Krivenyshev and Stepan Golosunov.)
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Changes to past timestamps
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Correct many pre-1986 transitions, fixing entries originally
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derived from Shanks. The fixes include:
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- Australia: several 1917 through 1971 transitions
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- The Bahamas: several 1941 through 1945 transitions
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- Bermuda: several 1917 through 1956 transitions
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- Belize: several 1942 through 1968 transitions
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- Ghana: several 1915 through 1956 transitions
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- Israel and Palestine: several 1940 through 1985 transitions
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- Kenya and adjacent: several 1908 through 1960 transitions
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- Nigeria and adjacent: correcting LMT in Lagos, and several 1905
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through 1919 transitions
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- Seychelles: the introduction of standard time in 1907, not 1906
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- Vanuatu: DST in 1973-1974, and a corrected 1984 transition
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(Thanks to P Chan.)
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Because of the Australia change, Australia/Currie (King Island) is
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no longer needed, as it is identical to Australia/Hobart for all
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timestamps since 1970 and was therefore created by mistake.
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Australia/Currie has been moved to the 'backward' file and its
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corrected data moved to the 'backzone' file.
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Changes to past time zone abbreviations and DST flags
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To better match legislation in Turks and Caicos, the 2015 shift to
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year-round observance of -04 is now modeled as AST throughout before
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returning to Eastern Time with US DST in 2018, rather than as
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maintaining EDT until 2015-11-01. (Thanks to P Chan.)
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Changes to documentation
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The zic man page now documents zic's coalescing of transitions
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when a zone falls back just before DST springs forward.
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Release 2020d - 2020-10-21 11:24:13 -0700
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Briefly:
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Palestine ends DST earlier than predicted, on 2020-10-24.
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Changes to past and future timestamps
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Palestine ends DST on 2020-10-24 at 01:00, instead of 2020-10-31
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as previously predicted (thanks to Sharef Mustafa.) Its
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2019-10-26 fall-back was at 00:00, not 01:00 (thanks to Steffen
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Thorsen.) Its 2015-10-23 transition was at 01:00 not 00:00, and
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its spring 2020 transition was on March 28 at 00:00, not March 27
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(thanks to Pierre Cashon.) This affects Asia/Gaza and
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Asia/Hebron. Assume future spring and fall transitions will be on
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the Saturday preceding the last Sunday of March and October,
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respectively.
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Release 2020c - 2020-10-16 11:15:53 -0700
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Briefly:
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Fiji starts DST later than usual, on 2020-12-20.
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Changes to future timestamps
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Fiji will start DST on 2020-12-20, instead of 2020-11-08 as
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previously predicted. DST will still end on 2021-01-17.
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(Thanks to Raymond Kumar and Alan Mintz.) Assume for now that
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the later-than-usual start date is a one-time departure from the
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recent pattern.
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Changes to build procedure
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Rearguard tarballs now contain an empty file pacificnew.
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Some older downstream software expects this file to exist.
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(Problem reported by Mike Cullinan.)
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Release 2020b - 2020-10-06 18:35:04 -0700
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Briefly:
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Revised predictions for Morocco's changes starting in 2023.
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Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08.
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Macquarie Island has stayed in sync with Tasmania since 2011.
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Casey, Antarctica is at +08 in winter and +11 in summer.
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zic no longer supports -y, nor the TYPE field of Rules.
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Changes to future timestamps
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Morocco's spring-forward after Ramadan is now predicted to occur
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no sooner than two days after Ramadan, instead of one day.
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(Thanks to Milamber.) The first altered prediction is for 2023,
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now predicted to spring-forward on April 30 instead of April 23.
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Changes to past and future timestamps
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Casey Station, Antarctica has been using +08 in winter and +11 in
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summer since 2018. The most recent transition from +08 to +11 was
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2020-10-04 00:01. Also, Macquarie Island has been staying in
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sync with Tasmania since 2011. (Thanks to Steffen Thorsen.)
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Changes to past and future time zone abbreviations and DST flags
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Canada's Yukon, represented by America/Whitehorse and
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America/Dawson, changes its time zone rules from -08/-07 to
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permanent -07 on 2020-11-01, not on 2020-03-08 as 2020a had it.
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This change affects only the time zone abbreviation (MST vs PDT)
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and daylight saving flag for the period between the two dates.
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(Thanks to Andrew G. Smith.)
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Changes to past timestamps
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Correct several transitions for Hungary for 1918/1983.
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For example, the 1983-09-25 fall-back was at 01:00, not 03:00.
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(Thanks to Géza Nyáry.) Also, the 1890 transition to standard
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time was on 11-01, not 10-01 (thanks to Michael Deckers).
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The 1891 French transition was on March 16, not March 15. The
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1911-03-11 French transition was at midnight, not a minute later.
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Monaco's transitions were on 1892-06-01 and 1911-03-29, not
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1891-03-15 and 1911-03-11. (Thanks to Michael Deckers.)
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Changes to code
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Support for zic's long-obsolete '-y YEARISTYPE' option has been
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removed and, with it, so has support for the TYPE field in Rule
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lines, which is now reserved for compatibility with earlier zic.
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These features were previously deprecated in release 2015f.
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(Thanks to Tim Parenti.)
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zic now defaults to '-b slim' instead of to '-b fat'.
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zic's new '-l -' and '-p -' options uninstall any existing
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localtime and posixrules files, respectively.
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The undocumented and ineffective tzsetwall function has been
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removed.
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Changes to build procedure
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The Makefile now defaults POSIXRULES to '-', so the posixrules
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feature (obsolete as of 2019b) is no longer installed by default.
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Changes to documentation and commentary
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The long-obsolete files pacificnew, systemv, and yearistype.sh have
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been removed from the distribution. (Thanks to Tim Parenti.)
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Release 2020a - 2020-04-23 16:03:47 -0700
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Briefly:
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Morocco springs forward on 2020-05-31, not 2020-05-24.
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Canada's Yukon advanced to -07 year-round on 2020-03-08.
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America/Nuuk renamed from America/Godthab.
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zic now supports expiration dates for leap second lists.
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Changes to future timestamps
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Morocco's second spring-forward transition in 2020 will be May 31,
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not May 24 as predicted earlier. (Thanks to Semlali Naoufal.)
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Adjust future-year predictions to use the first Sunday after the
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day after Ramadan, not the first Sunday after Ramadan.
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Canada's Yukon, represented by America/Whitehorse and
|
||
America/Dawson, advanced to -07 year-round, beginning with its
|
||
spring-forward transition on 2020-03-08, and will not fall back on
|
||
2020-11-01. Although a government press release calls this
|
||
"permanent Pacific Daylight Saving Time", we prefer MST for
|
||
consistency with nearby Dawson Creek, Creston, and Fort Nelson.
|
||
(Thanks to Tim Parenti.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Shanghai observed DST in 1919. (Thanks to Phake Nick.)
|
||
|
||
Changes to timezone identifiers
|
||
|
||
To reflect current usage in English better, America/Godthab has
|
||
been renamed to America/Nuuk. A backwards-compatibility link
|
||
remains for the old name.
|
||
|
||
Changes to code
|
||
|
||
localtime.c no longer mishandles timestamps after the last
|
||
transition in a TZif file with leap seconds and with daylight
|
||
saving time transitions projected into the indefinite future.
|
||
For example, with TZ='America/Los_Angeles' with leap seconds,
|
||
zdump formerly reported a DST transition on 2038-03-14
|
||
from 01:59:32.999... to 02:59:33 instead of the correct transition
|
||
from 01:59:59.999... to 03:00:00.
|
||
|
||
zic -L now supports an Expires line in the leapseconds file, and
|
||
truncates the TZif output accordingly. This propagates leap
|
||
second expiration information into the TZif file, and avoids the
|
||
abovementioned localtime.c bug as well as similar bugs present in
|
||
many client implementations. If no Expires line is present, zic
|
||
-L instead truncates the TZif output based on the #expires comment
|
||
present in leapseconds files distributed by tzdb 2018f and later;
|
||
however, this usage is obsolescent. For now, the distributed
|
||
leapseconds file has an Expires line that is commented out, so
|
||
that the file can be fed to older versions of zic which ignore the
|
||
commented-out line. Future tzdb distributions are planned to
|
||
contain a leapseconds file with an Expires line.
|
||
|
||
The configuration macros HAVE_TZNAME and USG_COMPAT should now be
|
||
set to 1 if the system library supports the feature, and 2 if not.
|
||
As before, these macros are nonzero if tzcode should support the
|
||
feature, zero otherwise.
|
||
|
||
The configuration macro ALTZONE now has the same values with the
|
||
same meaning as HAVE_TZNAME and USG_COMPAT.
|
||
|
||
The code's defense against CRLF in leap-seconds.list is now
|
||
portable to POSIX awk. (Problem reported by Deborah Goldsmith.)
|
||
|
||
Although the undocumented tzsetwall function is not changed in
|
||
this release, it is now deprecated in preparation for removal in
|
||
future releases. Due to POSIX requirements, tzsetwall has not
|
||
worked for some time. Any code that uses it should instead use
|
||
tzalloc(NULL) or, if portability trumps thread-safety, should
|
||
unset the TZ environment variable.
|
||
|
||
Changes to commentary
|
||
|
||
The Îles-de-la-Madeleine and the Listuguj reserve are noted as
|
||
following America/Halifax, and comments about Yukon's "south" and
|
||
"north" have been corrected to say "east" and "west". (Thanks to
|
||
Jeffery Nichols.)
|
||
|
||
|
||
Release 2019c - 2019-09-11 08:59:48 -0700
|
||
|
||
Briefly:
|
||
Fiji observes DST from 2019-11-10 to 2020-01-12.
|
||
Norfolk Island starts observing Australian-style DST.
|
||
|
||
Changes to future timestamps
|
||
|
||
Fiji's next DST transitions will be 2019-11-10 and 2020-01-12
|
||
instead of 2019-11-03 and 2020-01-19. (Thanks to Raymond Kumar.)
|
||
Adjust future guesses accordingly.
|
||
|
||
Norfolk Island will observe Australian-style DST starting in
|
||
spring 2019. The first transition is on 2019-10-06. (Thanks to
|
||
Kyle Czech and Michael Deckers.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Many corrections to time in Turkey from 1940 through 1985.
|
||
(Thanks to Oya Vulaş via Alois Treindl, and to Kıvanç Yazan.)
|
||
|
||
The Norfolk Island 1975-03-02 transition was at 02:00 standard
|
||
time, not 02:00 DST. (Thanks to Michael Deckers.)
|
||
|
||
South Korea observed DST from 1948 through 1951. Although this
|
||
info was supposed to appear in release 2014j, a typo inadvertently
|
||
suppressed the change. (Thanks to Alois Treindl.)
|
||
|
||
Detroit observed DST in 1967 and 1968 following the US DST rules,
|
||
except that its 1967 DST began on June 14 at 00:01. (Thanks to
|
||
Alois Treindl for pointing out that the old data entries were
|
||
probably wrong.)
|
||
|
||
Fix several errors in pre-1970 transitions in Perry County, IN.
|
||
(Thanks to Alois Treindl for pointing out the 1967/9 errors.)
|
||
|
||
Edmonton did not observe DST in 1967 or 1969. In 1946 Vancouver
|
||
ended DST on 09-29 not 10-13, and Vienna ended DST on 10-07 not
|
||
10-06. In 1945 Königsberg (now Kaliningrad) switched from +01/+02
|
||
to +02/+03 on 04-10 not 01-01, and its +02/+03 is abbreviated
|
||
EET/EEST, not CET/CEST. (Thanks to Alois Treindl.) In 1946
|
||
Königsberg switched to +03 on 04-07 not 01-01.
|
||
|
||
In 1946 Louisville switched from CST to CDT on 04-28 at 00:01, not
|
||
01-01 at 00:00. (Thanks to Alois Treindl and Michael Deckers.)
|
||
Also, it switched from CST to CDT on 1950-04-30, not 1947-04-27.
|
||
|
||
The 1892-05-01 transition in Brussels was at 00:17:30, not at noon.
|
||
(Thanks to Michael Deckers.)
|
||
|
||
Changes to past time zone abbreviations and DST flags
|
||
|
||
Hong Kong Winter Time, observed from 1941-10-01 to 1941-12-25,
|
||
is now flagged as DST and is abbreviated HKWT not HKT.
|
||
|
||
Changes to code
|
||
|
||
leapseconds.awk now relies only on its input data, rather than
|
||
also relying on its comments. (Inspired by code from Dennis
|
||
Ferguson and Chris Woodbury.)
|
||
|
||
The code now defends against CRLFs in leap-seconds.list.
|
||
(Thanks to Brian Inglis and Chris Woodbury.)
|
||
|
||
Changes to documentation and commentary
|
||
|
||
theory.html discusses leap seconds. (Thanks to Steve Summit.)
|
||
|
||
Nashville's newspapers dueled about the time of day in the 1950s.
|
||
(Thanks to John Seigenthaler.)
|
||
|
||
Liechtenstein observed Swiss DST in 1941/2.
|
||
(Thanks to Alois Treindl.)
|
||
|
||
|
||
Release 2019b - 2019-07-01 00:09:53 -0700
|
||
|
||
Briefly:
|
||
Brazil no longer observes DST.
|
||
'zic -b slim' outputs smaller TZif files; please try it out.
|
||
Palestine's 2019 spring-forward transition was on 03-29, not 03-30.
|
||
|
||
Changes to future timestamps
|
||
|
||
Brazil has canceled DST and will stay on standard time indefinitely.
|
||
(Thanks to Steffen Thorsen, Marcus Diniz, and Daniel Soares de
|
||
Oliveira.)
|
||
|
||
Predictions for Morocco now go through 2087 instead of 2037, to
|
||
work around a problem on newlib when using TZif files output by
|
||
zic 2019a or earlier. (Problem reported by David Gauchard.)
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Palestine's 2019 spring transition was 03-29 at 00:00, not 03-30
|
||
at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess
|
||
future transitions to be March's last Friday at 00:00.
|
||
|
||
Changes to past timestamps
|
||
|
||
Hong Kong's 1941-06-15 spring-forward transition was at 03:00, not
|
||
03:30. Its 1945 transition from JST to HKT was on 11-18 at 02:00,
|
||
not 09-15 at 00:00. In 1946 its spring-forward transition was on
|
||
04-21 at 00:00, not the previous day at 03:30. From 1946 through
|
||
1952 its fall-back transitions occurred at 04:30, not at 03:30.
|
||
In 1947 its fall-back transition was on 11-30, not 12-30.
|
||
(Thanks to P Chan.)
|
||
|
||
Changes to past time zone abbreviations
|
||
|
||
Italy's 1866 transition to Rome Mean Time was on December 12, not
|
||
September 22. This affects only the time zone abbreviation for
|
||
Europe/Rome between those dates. (Thanks to Stephen Trainor and
|
||
Luigi Rosa.)
|
||
|
||
Changes affecting metadata only
|
||
|
||
Add info about the Crimea situation in zone1970.tab and zone.tab.
|
||
(Problem reported by Serhii Demediuk.)
|
||
|
||
Changes to code
|
||
|
||
zic's new -b option supports a way to control data bloat and to
|
||
test for year-2038 bugs in software that reads TZif files.
|
||
'zic -b fat' and 'zic -b slim' generate larger and smaller output;
|
||
for example, changing from fat to slim shrinks the Europe/London
|
||
file from 3648 to 1599 bytes, saving about 56%. Fat and slim
|
||
files represent the same set of timestamps and use the same TZif
|
||
format as documented in tzfile(5) and in Internet RFC 8536.
|
||
Fat format attempts to work around bugs or incompatibilities in
|
||
older software, notably software that mishandles 64-bit TZif data
|
||
or uses obsolete TZ strings like "EET-2EEST" that lack DST rules.
|
||
Slim format is more efficient and does not work around 64-bit bugs
|
||
or obsolete TZ strings. Currently zic defaults to fat format
|
||
unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this
|
||
out-of-the-box default is intended to change in future releases
|
||
as the buggy software often mishandles timestamps anyway.
|
||
|
||
zic no longer treats a set of rules ending in 2037 specially.
|
||
Previously, zic assumed that such a ruleset meant that future
|
||
timestamps could not be predicted, and therefore omitted a
|
||
POSIX-like TZ string in the TZif output. The old behavior is no
|
||
longer needed for current tzdata, and caused problems with newlib
|
||
when used with older tzdata (reported by David Gauchard).
|
||
|
||
zic no longer generates some artifact transitions. For example,
|
||
Europe/London no longer has a no-op transition in January 1996.
|
||
|
||
Changes to build procedure
|
||
|
||
tzdata.zi now assumes zic 2017c or later. This shrinks tzdata.zi
|
||
by a percent or so.
|
||
|
||
Changes to documentation and commentary
|
||
|
||
The Makefile now documents the POSIXRULES macro as being obsolete,
|
||
and similarly, zic's -p POSIXRULES option is now documented as
|
||
being obsolete. Although the POSIXRULES feature still exists and
|
||
works as before, in practice it is rarely used for its intended
|
||
purpose, and it does not work either in the default reference
|
||
implementation (for timestamps after 2037) or in common
|
||
implementations such as GNU/Linux (for contemporary timestamps).
|
||
Since POSIXRULES was designed primarily as a temporary transition
|
||
facility for System V platforms that died off decades ago, it is
|
||
being decommissioned rather than institutionalized.
|
||
|
||
New info on Bonin Islands and Marcus (thanks to Wakaba and Phake Nick).
|
||
|
||
|
||
Release 2019a - 2019-03-25 22:01:33 -0700
|
||
|
||
Briefly:
|
||
Palestine "springs forward" on 2019-03-30 instead of 2019-03-23.
|
||
Metlakatla "fell back" to rejoin Alaska Time on 2019-01-20 at 02:00.
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Palestine will not start DST until 2019-03-30, instead of 2019-03-23 as
|
||
previously predicted. Adjust our prediction by guessing that spring
|
||
transitions will be between 24 and 30 March, which matches recent practice
|
||
since 2016. (Thanks to Even Scharning and Tim Parenti.)
|
||
|
||
Metlakatla ended its observance of Pacific standard time,
|
||
rejoining Alaska Time, on 2019-01-20 at 02:00. (Thanks to Ryan
|
||
Stanley and Tim Parenti.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Israel observed DST in 1980 (08-02/09-13) and 1984 (05-05/08-25).
|
||
(Thanks to Alois Treindl and Isaac Starkman.)
|
||
|
||
Changes to time zone abbreviations
|
||
|
||
Etc/UCT is now a backward-compatibility link to Etc/UTC, instead
|
||
of being a separate zone that generates the abbreviation "UCT",
|
||
which nowadays is typically a typo. (Problem reported by Isiah
|
||
Meadows.)
|
||
|
||
Changes to code
|
||
|
||
zic now has an -r option to limit the time range of output data.
|
||
For example, 'zic -r @1000000000' limits the output data to
|
||
timestamps starting 1000000000 seconds after the Epoch.
|
||
This helps shrink output size and can be useful for applications
|
||
not needing the full timestamp history, such as TZDIST truncation;
|
||
see Internet RFC 8536 section 5.1. (Inspired by a feature request
|
||
from Christopher Wong, helped along by bug reports from Wong and
|
||
from Tim Parenti.)
|
||
|
||
Changes to documentation
|
||
|
||
Mention Internet RFC 8536 (February 2019), which documents TZif.
|
||
|
||
tz-link.html now cites tzdata-meta
|
||
<https://tzdata-meta.timtimeonline.com/>.
|
||
|
||
|
||
Release 2018i - 2018-12-30 11:05:43 -0800
|
||
|
||
Briefly:
|
||
São Tomé and Príncipe switches from +01 to +00 on 2019-01-01.
|
||
|
||
Changes to future timestamps
|
||
|
||
Due to a change in government, São Tomé and Príncipe switches back
|
||
from +01 to +00 on 2019-01-01 at 02:00. (Thanks to Vadim
|
||
Nasardinov and Michael Deckers.)
|
||
|
||
|
||
Release 2018h - 2018-12-23 17:59:32 -0800
|
||
|
||
Briefly:
|
||
Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21.
|
||
New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move.
|
||
Metlakatla, Alaska observes PST this winter only.
|
||
Guess Morocco will continue to adjust clocks around Ramadan.
|
||
Add predictions for Iran from 2038 through 2090.
|
||
|
||
Changes to future timestamps
|
||
|
||
Guess that Morocco will continue to fall back just before and
|
||
spring forward just after Ramadan, the practice since 2012.
|
||
(Thanks to Maamar Abdelkader.) This means Morocco will observe
|
||
negative DST during Ramadan in main and vanguard formats, and in
|
||
rearguard format it stays in the +00 timezone and observes
|
||
ordinary DST in all months other than Ramadan. As before, extend
|
||
this guesswork to the year 2037. As a consequence, Morocco is
|
||
scheduled to observe three DST transitions in some Gregorian years
|
||
(e.g., 2033) due to the mismatch between the Gregorian and Islamic
|
||
calendars.
|
||
|
||
The table of exact transitions for Iranian DST has been extended.
|
||
It formerly cut off before the year 2038 in a nod to 32-bit time_t.
|
||
It now cuts off before 2091 as there is doubt about how the Persian
|
||
calendar will treat 2091. This change predicts DST transitions in
|
||
2038-9, 2042-3, and 2046-7 to occur one day later than previously
|
||
predicted. As before, post-cutoff transitions are approximated.
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to
|
||
+05 on 2018-12-21. This is a zone split as Qostanay (aka
|
||
Kostanay) did not switch, so create a zone Asia/Qostanay.
|
||
|
||
Metlakatla moved from Alaska to Pacific standard time on 2018-11-04.
|
||
It did not change clocks that day and remains on -08 this winter.
|
||
(Thanks to Ryan Stanley.) It will revert to the usual Alaska
|
||
rules next spring, so this change affects only timestamps
|
||
from 2018-11-04 through 2019-03-10.
|
||
|
||
Change to past timestamps
|
||
|
||
Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00,
|
||
not 00:00. I transcribed the time incorrectly from Shanks.
|
||
(Thanks to Phake Nick.)
|
||
|
||
Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00.
|
||
(Thanks to Phake Nick.)
|
||
|
||
Guam observed DST irregularly from 1959 through 1977.
|
||
(Thanks to Phake Nick.)
|
||
|
||
Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on
|
||
10-01 changed standard time to +08:30 (not +08). Its transition
|
||
back to +08 after WWII was on 1945-09-15, not the previous day.
|
||
Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT).
|
||
(Thanks to Phake Nick, Steve Allen, and Joseph Myers.) Also,
|
||
its 1952 fallback was on 11-02 (not 10-25).
|
||
|
||
This release contains many changes to timestamps before 1946 due
|
||
to Japanese possession or occupation of Pacific/Chuuk,
|
||
Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro,
|
||
Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei.
|
||
(Thanks to Phake Nick.)
|
||
|
||
Assume that the Spanish East Indies was like the Philippines and
|
||
observed American time until the end of 1844. This affects
|
||
Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei.
|
||
|
||
Changes to past tm_isdst flags
|
||
|
||
For the recent Morocco change, the tm_isdst flag should be 1 from
|
||
2018-10-27 00:00 to 2018-10-28 03:00. (Thanks to Michael Deckers.)
|
||
Give a URL to the official decree. (Thanks to Matt Johnson.)
|
||
|
||
|
||
Release 2018g - 2018-10-26 22:22:45 -0700
|
||
|
||
Briefly:
|
||
Morocco switches to permanent +01 on 2018-10-28.
|
||
|
||
Changes to future timestamps
|
||
|
||
Morocco switches from +00/+01 to permanent +01 effective 2018-10-28,
|
||
so its clocks will not fall back as previously scheduled.
|
||
(Thanks to Mohamed Essedik Najd and Brian Inglis.)
|
||
|
||
Changes to code
|
||
|
||
When generating TZif files with leap seconds, zic no longer uses a
|
||
format that trips up older 32-bit clients, fixing a bug introduced
|
||
in 2018f. (Reported by Daniel Fischer.) Also, the zic workaround
|
||
for QTBUG-53071 now also works for TZif files with leap seconds.
|
||
|
||
The translator to rearguard format now rewrites the line
|
||
"Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to
|
||
"Rule Japan 1948 1951 - Sep Sun>=9 1:00 0 S".
|
||
This caters to zic before 2007 and to Oracle TZUpdater 2.2.0
|
||
and earlier. (Reported by Christos Zoulas.)
|
||
|
||
Changes to past time zone abbreviations
|
||
|
||
Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii.
|
||
This reverts to 2011h, as the abbreviation change in 2011i was
|
||
likely inadvertent.
|
||
|
||
Changes to documentation
|
||
|
||
tzfile.5 has new sections on interoperability issues.
|
||
|
||
|
||
Release 2018f - 2018-10-18 00:14:18 -0700
|
||
|
||
Briefly:
|
||
Volgograd moves from +03 to +04 on 2018-10-28.
|
||
Fiji ends DST 2019-01-13, not 2019-01-20.
|
||
Most of Chile changes DST dates, effective 2019-04-06.
|
||
|
||
Changes to future timestamps
|
||
|
||
Volgograd moves from +03 to +04 on 2018-10-28 at 02:00.
|
||
(Thanks to Alexander Fetisov and Stepan Golosunov.)
|
||
|
||
Fiji ends DST 2019-01-13 instead of the 2019-01-20 previously
|
||
predicted. (Thanks to Raymond Kumar.) Adjust future predictions
|
||
accordingly.
|
||
|
||
Most of Chile will end DST on the first Saturday in April at 24:00 mainland
|
||
time, and resume DST on the first Saturday in September at 24:00 mainland
|
||
time. The changes are effective from 2019-04-06, and do not affect the
|
||
Magallanes region modeled by America/Punta_Arenas. (Thanks to Juan Correa
|
||
and Tim Parenti.) Adjust future predictions accordingly.
|
||
|
||
Changes to past timestamps
|
||
|
||
The 2018-05-05 North Korea 30-minute time zone change took place
|
||
at 23:30 the previous day, not at 00:00 that day.
|
||
|
||
China's 1988 spring-forward transition was on April 17, not
|
||
April 10. Its DST transitions in 1986/91 were at 02:00, not 00:00.
|
||
(Thanks to P Chan.)
|
||
|
||
Fix several issues for Macau before 1992. Macau's pre-1904 LMT
|
||
was off by 10 s. Macau switched to +08 in 1904 not 1912, and
|
||
temporarily switched to +09/+10 during World War II. Macau
|
||
observed DST in 1942/79, not 1961/80, and there were several
|
||
errors for transition times and dates. (Thanks to P Chan.)
|
||
|
||
The 1948-1951 fallback transitions in Japan were at 25:00 on
|
||
September's second Saturday, not at 24:00. (Thanks to Phake Nick.)
|
||
zic turns this into 01:00 on the day after September's second
|
||
Saturday, which is the best that POSIX or C platforms can do.
|
||
|
||
Incorporate 1940-1949 Asia/Shanghai DST transitions from a 2014
|
||
paper by Li Yu, replacing more-questionable data from Shanks.
|
||
|
||
Changes to time zone abbreviations
|
||
|
||
Use "PST" and "PDT" for Philippine time. (Thanks to Paul Goyette.)
|
||
|
||
Changes to code
|
||
|
||
zic now always generates TZif files where time type 0 is used for
|
||
timestamps before the first transition. This simplifies the
|
||
reading of TZif files and should not affect behavior of existing
|
||
TZif readers because the same set of time types is used; only
|
||
their internal indexes may have changed. This affects only the
|
||
legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and
|
||
EET, which previously used nonzero types for these timestamps.
|
||
|
||
Because of the type 0 change, zic no longer outputs a dummy
|
||
transition at time -2**59 (before the Big Bang), as clients should
|
||
no longer need this to handle historical timestamps correctly.
|
||
This reverts a change introduced in 2013d and shrinks most TZif
|
||
files by a few bytes.
|
||
|
||
zic now supports negative time-of-day in Rule and Leap lines, e.g.,
|
||
"Rule X min max - Apr lastSun -6:00 1:00 -" means the transition
|
||
occurs at 18:00 on the Saturday before the last Sunday in April.
|
||
This behavior was documented in 2018a but the code did not
|
||
entirely match the documentation.
|
||
|
||
localtime.c no longer requires at least one time type in TZif
|
||
files that lack transitions or have a POSIX-style TZ string. This
|
||
future-proofs the code against possible future extensions to the
|
||
format that would allow TZif files with POSIX-style TZ strings and
|
||
without transitions or time types.
|
||
|
||
A read-access subscript error in localtime.c has been fixed.
|
||
It could occur only in TZif files with timecnt == 0, something that
|
||
does not happen in practice now but could happen in future versions.
|
||
|
||
localtime.c no longer ignores TZif POSIX-style TZ strings that
|
||
specify only standard time. Instead, these TZ strings now
|
||
override the default time type for timestamps after the last
|
||
transition (or for all timestamps if there are no transitions),
|
||
just as DST strings specifying DST have always done.
|
||
|
||
leapseconds.awk now outputs "#updated" and "#expires" comments,
|
||
and supports leap seconds at the ends of months other than June
|
||
and December. (Inspired by suggestions from Chris Woodbury.)
|
||
|
||
Changes to documentation
|
||
|
||
New restrictions: A Rule name must start with a character that
|
||
is neither an ASCII digit nor "-" nor "+", and an unquoted name
|
||
should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~".
|
||
The latter restriction makes room for future extensions (a
|
||
possibility noted by Tom Lane).
|
||
|
||
tzfile.5 now documents what time types apply before the first and
|
||
after the last transition, if any.
|
||
|
||
Documentation now uses the spelling "timezone" for a TZ setting
|
||
that determines timestamp history, and "time zone" for a
|
||
geographic region currently sharing the same standard time.
|
||
|
||
The name "TZif" is now used for the tz binary data format.
|
||
|
||
tz-link.htm now mentions the A0 TimeZone Migration utilities.
|
||
(Thanks to Aldrin Martoq for the link.)
|
||
|
||
Changes to build procedure
|
||
|
||
New 'make' target 'rearguard_tarballs' to build the rearguard
|
||
tarball only. This is a convenience on platforms that lack lzip
|
||
if you want to build the rearguard tarball. (Problem reported by
|
||
Deborah Goldsmith.)
|
||
|
||
tzdata.zi is now more stable from release to release. (Problem
|
||
noted by Tom Lane.) It is also a bit shorter.
|
||
|
||
tzdata.zi now can contain comment lines documenting configuration
|
||
information, such as which data format was selected, which input
|
||
files were used, and how leap seconds are treated. (Problems
|
||
noted by Lester Caine and Brian Inglis.) If the Makefile defaults
|
||
are used these comment lines are absent, for backward
|
||
compatibility. A redistributor intending to alter its copy of the
|
||
files should also append "-LABEL" to the 'version' file's first
|
||
line, where "LABEL" identifies the redistributor's change.
|
||
|
||
|
||
Release 2018e - 2018-05-01 23:42:51 -0700
|
||
|
||
Briefly:
|
||
|
||
North Korea switches back to +09 on 2018-05-05.
|
||
The main format uses negative DST again, for Ireland etc.
|
||
'make tarballs' now also builds a rearguard tarball.
|
||
New 's' and 'd' suffixes in SAVE columns of Rule and Zone lines.
|
||
|
||
Changes to past and future timestamps
|
||
|
||
North Korea switches back from +0830 to +09 on 2018-05-05.
|
||
(Thanks to Kang Seonghoon, Arthur David Olson, Seo Sanghyeon,
|
||
and Tim Parenti.)
|
||
|
||
Bring back the negative-DST changes of 2018a, except be more
|
||
compatible with data parsers that do not support negative DST.
|
||
Also, this now affects historical timestamps in Namibia and the
|
||
former Czechoslovakia, not just Ireland. The main format now uses
|
||
negative DST to model timestamps in Europe/Dublin (from 1971 on),
|
||
Europe/Prague (1946/7), and Africa/Windhoek (1994/2017). This
|
||
does not affect UT offsets, only time zone abbreviations and the
|
||
tm_isdst flag. Also, this does not affect rearguard or vanguard
|
||
formats; effectively the main format now uses vanguard instead of
|
||
rearguard format. Data parsers that do not support negative DST
|
||
can still use data from the rearguard tarball described below.
|
||
|
||
Changes to build procedure
|
||
|
||
The command 'make tarballs' now also builds the tarball
|
||
tzdataVERSION-rearguard.tar.gz, which is like tzdataVERSION.tar.gz
|
||
except that it uses rearguard format intended for trailing-edge
|
||
data parsers.
|
||
|
||
Changes to data format and to code
|
||
|
||
The SAVE column of Rule and Zone lines can now have an 's' or 'd'
|
||
suffix, which specifies whether the adjusted time is standard time
|
||
or daylight saving time. If no suffix is given, daylight saving
|
||
time is used if and only if the SAVE column is nonzero; this is
|
||
the longstanding behavior. Although this new feature is not used
|
||
in tzdata, it could be used to specify the legal time in Namibia
|
||
1994-2017, as opposed to the popular time (see below).
|
||
|
||
Changes to past timestamps
|
||
|
||
From 1994 through 2017 Namibia observed DST in winter, not summer.
|
||
That is, it used negative DST, as Ireland still does. This change
|
||
does not affect UTC offsets; it affects only the tm_isdst flag and
|
||
the abbreviation used during summer, which is now CAT, not WAST.
|
||
Although (as noted by Michael Deckers) summer and winter time were
|
||
both simply called "standard time" in Namibian law, in common
|
||
practice winter time was considered to be DST (as noted by Stephen
|
||
Colebourne). The full effect of this change is only in vanguard
|
||
and main format; in rearguard format, the tm_isdst flag is still
|
||
zero in winter and nonzero in summer.
|
||
|
||
In 1946/7 Czechoslovakia also observed negative DST in winter.
|
||
The full effect of this change is only in vanguard and main
|
||
formats; in rearguard format, it is modeled as plain GMT without
|
||
daylight saving. Also, the dates of some 1944/5 DST transitions
|
||
in Czechoslovakia have been changed.
|
||
|
||
|
||
Release 2018d - 2018-03-22 07:05:46 -0700
|
||
|
||
Briefly:
|
||
|
||
Palestine starts DST a week earlier in 2018.
|
||
Add support for vanguard and rearguard data consumers.
|
||
Add subsecond precision to source data format, though not to data.
|
||
|
||
Changes to future timestamps
|
||
|
||
In 2018, Palestine starts DST on March 24, not March 31.
|
||
Adjust future predictions accordingly. (Thanks to Sharef Mustafa.)
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Casey Station in Antarctica changed from +11 to +08 on 2018-03-11
|
||
at 04:00. (Thanks to Steffen Thorsen.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Historical transitions for Uruguay, represented by
|
||
America/Montevideo, have been updated per official legal documents,
|
||
replacing previous data mainly originating from the inventions of
|
||
Shanks & Pottenger. This has resulted in adjustments ranging from
|
||
30 to 90 minutes in either direction over at least two dozen
|
||
distinct periods ranging from one day to several years in length.
|
||
A mere handful of pre-1991 transitions are unaffected; data since
|
||
then has come from more reliable contemporaneous reporting. These
|
||
changes affect various timestamps in 1920-1923, 1936, 1939,
|
||
1942-1943, 1959, 1966-1970, 1972, 1974-1980, and 1988-1990.
|
||
Additionally, Uruguay's pre-standard-time UT offset has been
|
||
adjusted westward by 7 seconds, from UT-03:44:44 to UT-03:44:51, to
|
||
match the location of the Observatory of the National Meteorological
|
||
Institute in Montevideo.
|
||
(Thanks to Jeremie Bonjour, Tim Parenti, and Michael Deckers.)
|
||
|
||
East Kiribati skipped New Year's Eve 1994, not New Year's Day 1995.
|
||
(Thanks to Kerry Shetline.)
|
||
|
||
Fix the 1912-01-01 transition for Portugal and its colonies.
|
||
This transition was at 00:00 according to the new UT offset, not
|
||
according to the old one. Also assume that Cape Verde switched on
|
||
the same date as the rest, not in 1907. This affects
|
||
Africa/Bissau, Africa/Sao_Tome, Asia/Macau, Atlantic/Azores,
|
||
Atlantic/Cape_Verde, Atlantic/Madeira, and Europe/Lisbon.
|
||
(Thanks to Michael Deckers.)
|
||
|
||
Fix an off-by-1 error for pre-1913 timestamps in Jamaica and in
|
||
Turks & Caicos.
|
||
|
||
Changes to past time zone abbreviations
|
||
|
||
MMT took effect in Uruguay from 1908-06-10, not 1898-06-28. There
|
||
is no clock change associated with the transition.
|
||
|
||
Changes to build procedure
|
||
|
||
The new DATAFORM macro in the Makefile lets the installer choose
|
||
among three source data formats. The idea is to lessen downstream
|
||
disruption when data formats are improved.
|
||
|
||
* DATAFORM=vanguard installs from the latest, bleeding-edge
|
||
format. DATAFORM=main (the default) installs from the format
|
||
used in the 'africa' etc. files. DATAFORM=rearguard installs
|
||
from a trailing-edge format. Eventually, elements of today's
|
||
vanguard format should move to the main format, and similarly
|
||
the main format's features should eventually move to the
|
||
rearguard format.
|
||
|
||
* In the current version, the main and rearguard formats are
|
||
identical and match that of 2018c, so this change does not
|
||
affect default behavior. The vanguard format currently contains
|
||
one feature not in the main format: negative SAVE values. This
|
||
improves support for Ireland, which uses Irish Standard Time
|
||
(IST, UTC+01) in summer and GMT (UTC) in winter. tzcode has
|
||
supported negative SAVE values for decades, and this feature
|
||
should move to the main format soon. However, it will not move
|
||
to the rearguard format for quite some time because some
|
||
downstream parsers do not support it.
|
||
|
||
* The build procedure constructs three files vanguard.zi, main.zi,
|
||
and rearguard.zi, one for each format. Although the files
|
||
represent essentially the same data, they may have minor
|
||
discrepancies that users are not likely to notice. The files
|
||
are intended for downstream data consumers and are not
|
||
installed. Zoneinfo parsers that do not support negative SAVE values
|
||
should start using rearguard.zi, so that they will be unaffected
|
||
when the negative-DST feature moves from vanguard to main.
|
||
Bleeding-edge Zoneinfo parsers that support the new features
|
||
already can use vanguard.zi; in this respect, current tzcode is
|
||
bleeding-edge.
|
||
|
||
The Makefile should now be safe for parallelized builds, and 'make
|
||
-j to2050new.tzs' is now much faster on a multiprocessor host
|
||
with GNU Make.
|
||
|
||
When built with -DSUPPRESS_TZDIR, the tzcode library no longer
|
||
prepends TZDIR/ to file names that do not begin with '/'. This is
|
||
not recommended for general use, due to its security implications.
|
||
(From a suggestion by Manuela Friedrich.)
|
||
|
||
Changes to code
|
||
|
||
zic now accepts subsecond precision in expressions like
|
||
00:19:32.13, which is approximately the legal time of the
|
||
Netherlands from 1835 to 1937. However, because it is
|
||
questionable whether the few recorded uses of non-integer offsets
|
||
had subsecond precision in practice, there are no plans for tzdata
|
||
to use this feature. (Thanks to Steve Allen for pointing out
|
||
the limitations of historical data in this area.)
|
||
|
||
The code is a bit more portable to MS-Windows. Installers can
|
||
compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that
|
||
reserve identifiers like 'localtime'. (Thanks to Manuela
|
||
Friedrich.)
|
||
|
||
Changes to documentation and commentary
|
||
|
||
theory.html now outlines tzdb's extensions to POSIX's model for
|
||
civil time, and has a section "POSIX features no longer needed"
|
||
that lists POSIX API components that are now vestigial.
|
||
(From suggestions by Steve Summit.) It also better distinguishes
|
||
time zones from tz regions. (From a suggestion by Guy Harris.)
|
||
|
||
Commentary is now more consistent about using the phrase "daylight
|
||
saving time", to match the C name tm_isdst. Daylight saving time
|
||
need not occur in summer, and need not have a positive offset from
|
||
standard time.
|
||
|
||
Commentary about historical transitions in Uruguay has been expanded
|
||
with links to many relevant legal documents.
|
||
(Thanks to Tim Parenti.)
|
||
|
||
Commentary now uses some non-ASCII characters with Unicode value
|
||
less than U+0100, as they can be useful and should work even with
|
||
older editors such as XEmacs.
|
||
|
||
|
||
Release 2018c - 2018-01-22 23:00:44 -0800
|
||
|
||
Briefly:
|
||
Revert Irish changes that relied on negative SAVE values.
|
||
|
||
Changes to tm_isdst
|
||
|
||
Revert the 2018a change to Europe/Dublin. As before, this change
|
||
does not affect UT offsets or abbreviations; it affects only
|
||
whether timestamps are considered to be standard time or
|
||
daylight-saving time, as expressed in the tm_isdst flag of C's
|
||
struct tm type. This reversion is intended to be a temporary
|
||
workaround for problems discovered with downstream uses of
|
||
releases 2018a and 2018b, which implemented Irish time by using
|
||
negative SAVE values in the Eire rules of the 'europe' file.
|
||
Although negative SAVE values have been part of tzcode for many
|
||
years and are supported by many platforms, they were not
|
||
documented before 2018a and ICU and OpenJDK do not currently
|
||
support them. A mechanism to export data to platforms lacking
|
||
support for negative DST is planned to be developed before the
|
||
change is reapplied. (Problems reported by Deborah Goldsmith and
|
||
Stephen Colebourne.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Japanese DST transitions (1948-1951) were Sundays at 00:00, not
|
||
Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.)
|
||
|
||
Changes to build procedure
|
||
|
||
The build procedure now works around mawk 1.3.3's lack of support
|
||
for character class expressions. (Problem reported by Ohyama.)
|
||
|
||
|
||
Release 2018b - 2018-01-17 23:24:48 -0800
|
||
|
||
Briefly:
|
||
Fix a packaging problem in tz2018a, which was missing 'pacificnew'.
|
||
|
||
Changes to build procedure
|
||
|
||
The distribution now contains the file 'pacificnew' again.
|
||
This file was inadvertantly omitted in the 2018a distribution.
|
||
(Problem reported by Matias Fonzo.)
|
||
|
||
|
||
Release 2018a - 2018-01-12 22:29:21 -0800
|
||
|
||
Briefly:
|
||
São Tomé and Príncipe switched from +00 to +01.
|
||
Brazil's DST will now start on November's first Sunday.
|
||
Ireland's standard time is now in the summer, not the winter.
|
||
Use Debian-style installation locations, instead of 4.3BSD-style.
|
||
New zic option -t.
|
||
|
||
Changes to past and future timestamps
|
||
|
||
São Tomé and Príncipe switched from +00 to +01 on 2018-01-01 at
|
||
01:00. (Thanks to Steffen Thorsen and Michael Deckers.)
|
||
|
||
Changes to future timestamps
|
||
|
||
Starting in 2018 southern Brazil will begin DST on November's
|
||
first Sunday instead of October's third Sunday. (Thanks to
|
||
Steffen Thorsen.)
|
||
|
||
Changes to past timestamps
|
||
|
||
A discrepancy of 4 s in timestamps before 1931 in South Sudan has
|
||
been corrected. The 'backzone' and 'zone.tab' files did not agree
|
||
with the 'africa' and 'zone1970.tab' files. (Problem reported by
|
||
Michael Deckers.)
|
||
|
||
The abbreviation invented for Bolivia Summer Time (1931-2) is now
|
||
BST instead of BOST, to be more consistent with the convention
|
||
used for Latvian Summer Time (1918-9) and for British Summer Time.
|
||
|
||
Changes to tm_isdst
|
||
|
||
Change Europe/Dublin so that it observes Irish Standard Time (UT
|
||
+01) in summer and GMT (as negative daylight-saving) in winter,
|
||
instead of observing standard time (GMT) in winter and Irish
|
||
Summer Time (UT +01) in summer. This change does not affect UT
|
||
offsets or abbreviations; it affects only whether timestamps are
|
||
considered to be standard time or daylight-saving time, as
|
||
expressed in the tm_isdst flag of C's struct tm type.
|
||
(Discrepancy noted by Derick Rethans.)
|
||
|
||
Changes to build procedure
|
||
|
||
The default installation locations have been changed to mostly
|
||
match Debian circa 2017, instead of being designed as an add-on to
|
||
4.3BSD circa 1986. This affects the Makefile macros TOPDIR,
|
||
TZDIR, MANDIR, and LIBDIR. New Makefile macros TZDEFAULT, USRDIR,
|
||
USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor
|
||
locations more precisely. (This responds to suggestions from
|
||
Brian Inglis and from Steve Summit.)
|
||
|
||
The default installation procedure no longer creates the
|
||
backward-compatibility link US/Pacific-New, which causes
|
||
confusion during user setup (e.g., see Debian bug 815200).
|
||
Use 'make BACKWARD="backward pacificnew"' to create the link
|
||
anyway, for now. Eventually we plan to remove the link entirely.
|
||
|
||
tzdata.zi now contains a version-number comment.
|
||
(Suggested by Tom Lane.)
|
||
|
||
The Makefile now quotes values like BACKWARD more carefully when
|
||
passing them to the shell. (Problem reported by Zefram.)
|
||
|
||
Builders no longer need to specify -DHAVE_SNPRINTF on platforms
|
||
that have snprintf and use pre-C99 compilers. (Problem reported
|
||
by Jon Skeet.)
|
||
|
||
Changes to code
|
||
|
||
zic has a new option -t FILE that specifies the location of the
|
||
file that determines local time when TZ is unset. The default for
|
||
this location can be configured via the new TZDEFAULT makefile
|
||
macro, which defaults to /etc/localtime.
|
||
|
||
Diagnostics and commentary now distinguish UT from UTC more
|
||
carefully; see theory.html for more information about UT vs UTC.
|
||
|
||
zic has been ported to GCC 8's -Wstringop-truncation option.
|
||
(Problem reported by Martin Sebor.)
|
||
|
||
Changes to documentation and commentary
|
||
|
||
The zic man page now documents the longstanding behavior that
|
||
times and years can be out of the usual range, with negative times
|
||
counting backwards from midnight and with year 0 preceding year 1.
|
||
(Problem reported by Michael Deckers.)
|
||
|
||
The theory.html file now mentions the POSIX limit of six chars
|
||
per abbreviation, and lists alphabetic abbreviations used.
|
||
|
||
The files tz-art.htm and tz-link.htm have been renamed to
|
||
tz-art.html and tz-link.html, respectively, for consistency with
|
||
other file names and to simplify web server configuration.
|
||
|
||
|
||
Release 2017c - 2017-10-20 14:49:34 -0700
|
||
|
||
Briefly:
|
||
Northern Cyprus switches from +03 to +02/+03 on 2017-10-29.
|
||
Fiji ends DST 2018-01-14, not 2018-01-21.
|
||
Namibia switches from +01/+02 to +02 on 2018-04-01.
|
||
Sudan switches from +03 to +02 on 2017-11-01.
|
||
Tonga likely switches from +13/+14 to +13 on 2017-11-05.
|
||
Turks & Caicos switches from -04 to -05/-04 on 2018-11-04.
|
||
A new file tzdata.zi now holds a small text copy of all data.
|
||
The zic input format has been regularized slightly.
|
||
|
||
Changes to future timestamps
|
||
|
||
Northern Cyprus has decided to resume EU rules starting
|
||
2017-10-29, thus reinstituting winter time.
|
||
|
||
Fiji ends DST 2018-01-14 instead of the 2018-01-21 previously
|
||
predicted. (Thanks to Dominic Fok.) Adjust future predictions
|
||
accordingly.
|
||
|
||
Namibia will switch from +01 with DST to +02 all year on
|
||
2017-09-03 at 02:00. This affects UT offsets starting 2018-04-01
|
||
at 02:00. (Thanks to Steffen Thorsen.)
|
||
|
||
Sudan will switch from +03 to +02 on 2017-11-01. (Thanks to Ahmed
|
||
Atyya and Yahia Abdalla.) South Sudan is not switching, so
|
||
Africa/Juba is no longer a link to Africa/Khartoum.
|
||
|
||
Tonga has likely ended its experiment with DST, and will not
|
||
adjust its clocks on 2017-11-05. Although Tonga has not announced
|
||
whether it will continue to observe DST, the IATA is assuming that
|
||
it will not. (Thanks to David Wade.)
|
||
|
||
Turks & Caicos will switch from -04 all year to -05 with US DST on
|
||
2018-03-11 at 03:00. This affects UT offsets starting 2018-11-04
|
||
at 02:00. (Thanks to Steffen Thorsen.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Namibia switched from +02 to +01 on 1994-03-21, not 1994-04-03.
|
||
(Thanks to Arthur David Olson.)
|
||
|
||
Detroit did not observe DST in 1967.
|
||
|
||
Use railway time for Asia/Kolkata before 1941, by switching to
|
||
Madras local time (UT +052110) in 1870, then to IST (UT +0530) in
|
||
1906. Also, treat 1941-2's +0630 as DST, like 1942-5.
|
||
|
||
Europe/Dublin's 1946 and 1947 fallback transitions occurred at
|
||
02:00 standard time, not 02:00 DST. (Thanks to Michael Deckers.)
|
||
|
||
Pacific/Apia and Pacific/Pago_Pago switched from Antipodean to
|
||
American time in 1892, not 1879. (Thanks to Michael Deckers.)
|
||
|
||
Adjust the 1867 transition in Alaska to better reflect the
|
||
historical record, by changing it to occur on 1867-10-18 at 15:30
|
||
Sitka time rather than at the start of 1867-10-17 local time.
|
||
Although strictly speaking this is accurate only for Sitka,
|
||
the rest of Alaska's blanks need to be filled in somehow.
|
||
|
||
Fix off-by-one errors in UT offsets for Adak and Nome before 1867.
|
||
(Thanks to Michael Deckers.)
|
||
|
||
Add 7 s to the UT offset in Asia/Yangon before 1920.
|
||
|
||
Changes to zone names
|
||
|
||
Remove Canada/East-Saskatchewan from the 'backward' file, as it
|
||
exceeded the 14-character limit and was an unused misnomer anyway.
|
||
|
||
Changes to build procedure
|
||
|
||
To support applications that prefer to read time zone data in text
|
||
form, two zic input files tzdata.zi and leapseconds are now
|
||
installed by default. The commands 'zic tzdata.zi' and 'zic -L
|
||
leapseconds tzdata.zi' can reproduce the tzdata binary files
|
||
without and with leap seconds, respectively. To prevent these two
|
||
new files from being installed, use 'make TZDATA_TEXT=', and to
|
||
suppress leap seconds from the tzdata text installation, use 'make
|
||
TZDATA_TEXT=tzdata.zi'.
|
||
|
||
'make BACKWARD=' now suppresses backward-compatibility names
|
||
like 'US/Pacific' that are defined in the 'backward' and
|
||
'pacificnew' files.
|
||
|
||
'make check' now works on systems that lack a UTF-8 locale,
|
||
or that lack the nsgmls program. Set UTF8_LOCALE to configure
|
||
the name of a UTF-8 locale, if you have one.
|
||
|
||
Y2K runtime checks are no longer enabled by default. Add
|
||
-DDEPRECATE_TWO_DIGIT_YEARS to CFLAGS to enable them, instead of
|
||
adding -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU
|
||
to disable them. (New name suggested by Brian Inglis.)
|
||
|
||
The build procedure for zdump now works on AIX 7.1.
|
||
(Problem reported by Kees Dekker.)
|
||
|
||
Changes to code
|
||
|
||
zic and the reference runtime now reject multiple leap seconds
|
||
within 28 days of each other, or leap seconds before the Epoch.
|
||
As a result, support for double leap seconds, which was
|
||
obsolescent and undocumented, has been removed. Double leap
|
||
seconds were an error in the C89 standard; they have never existed
|
||
in civil timekeeping. (Thanks to Robert Elz and Bradley White for
|
||
noticing glitches in the code that uncovered this problem.)
|
||
|
||
zic now warns about use of the obsolescent and undocumented -y
|
||
option, and about use of the obsolescent TYPE field of Rule lines.
|
||
|
||
zic now allows unambiguous abbreviations like "Sa" and "Su" for
|
||
weekdays; formerly it rejected them due to a bug. Conversely, zic
|
||
no longer considers non-prefixes to be abbreviations; for example,
|
||
it no longer accepts "lF" as an abbreviation for "lastFriday".
|
||
Also, zic warns about the undocumented usage with a "last-"
|
||
prefix, e.g., "last-Fri".
|
||
|
||
Similarly, zic now accepts the unambiguous abbreviation "L" for
|
||
"Link" in ordinary context and for "Leap" in leap-second context.
|
||
Conversely, zic no longer accepts non-prefixes such as "La" as
|
||
abbreviations for words like "Leap".
|
||
|
||
zic no longer accepts leap second lines in ordinary input, or
|
||
ordinary lines in leap second input. Formerly, zic sometimes
|
||
warned about this undocumented usage and handled it incorrectly.
|
||
|
||
The new macro HAVE_TZNAME governs whether the tzname external
|
||
variable is exported, instead of USG_COMPAT. USG_COMPAT now
|
||
governs only the external variables "timezone" and "daylight".
|
||
This change is needed because the three variables are not in the
|
||
same category: although POSIX requires tzname, it specifies the
|
||
other two variables as optional. Also, USG_COMPAT is now 1 or 0:
|
||
if not defined, the code attempts to guess it from other macros.
|
||
|
||
localtime.c and difftime.c no longer require stdio.h, and .c files
|
||
other than zic.c no longer require sys/wait.h.
|
||
|
||
zdump.c no longer assumes snprintf. (Reported by Jonathan Leffler.)
|
||
|
||
Calculation of time_t extrema works around a bug in GCC 4.8.4
|
||
(Reported by Stan Shebs and Joseph Myers.)
|
||
|
||
zic.c no longer mistranslates formats of line numbers in non-English
|
||
locales. (Problem reported by Benno Schulenberg.)
|
||
|
||
Several minor changes have been made to the code to make it a
|
||
bit easier to port to MS-Windows and Solaris. (Thanks to Kees
|
||
Dekker for reporting the problems.)
|
||
|
||
Changes to documentation and commentary
|
||
|
||
The two new files 'theory.html' and 'calendars' contain the
|
||
contents of the removed file 'Theory'. The goal is to document
|
||
tzdb theory more accessibly.
|
||
|
||
The zic man page now documents abbreviation rules.
|
||
|
||
tz-link.htm now covers how to apply tzdata changes to clients.
|
||
(Thanks to Jorge Fábregas for the AIX link.) It also mentions MySQL.
|
||
|
||
The leap-seconds.list URL has been updated to something that is
|
||
more reliable for tzdb. (Thanks to Tim Parenti and Brian Inglis.)
|
||
|
||
Release 2017b - 2017-03-17 07:30:38 -0700
|
||
|
||
Briefly: Haiti has resumed DST.
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01.
|
||
|
||
Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430"
|
||
is one byte over the POSIX limit. (Problem reported by Derick Rethans.)
|
||
|
||
Changes to code
|
||
|
||
The reference localtime implementation now falls back on the
|
||
current US daylight-saving transition rules rather than the
|
||
1987-2006 rules. This fallback occurs only when (1) the TZ
|
||
environment variable has a value like "AST4ADT" that asks
|
||
for daylight saving time but does not specify the rules, (2) there
|
||
is no file by that name, and (3) the TZDEFRULES file cannot be
|
||
loaded. (Thanks to Tom Lane.)
|
||
|
||
|
||
Release 2017a - 2017-02-28 00:05:36 -0800
|
||
|
||
Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia
|
||
discontinues DST.
|
||
|
||
Changes to future timestamps
|
||
|
||
Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.)
|
||
|
||
Chile's Region of Magallanes moves from -04/-03 to -03 year-round.
|
||
Its clocks diverge from America/Santiago starting 2017-05-13 at
|
||
23:00, hiving off a new zone America/Punta_Arenas. Although the
|
||
Chilean government says this change expires in May 2019, for now
|
||
assume it's permanent. (Thanks to Juan Correa and Deborah
|
||
Goldsmith.) This also affects Antarctica/Palmer.
|
||
|
||
Changes to past timestamps
|
||
|
||
Fix many entries for historical timestamps for Europe/Madrid
|
||
before 1979, to agree with tables compiled by Pere Planesas of the
|
||
National Astronomical Observatory of Spain. As a side effect,
|
||
this changes some timestamps for Africa/Ceuta before 1929, which
|
||
are probably guesswork anyway. (Thanks to Steve Allen and
|
||
Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for
|
||
correcting the 1901 transition.)
|
||
|
||
Ecuador observed DST from 1992-11-28 to 1993-02-05.
|
||
(Thanks to Alois Treindl.)
|
||
|
||
Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21.
|
||
(Thanks to Stepan Golosunov.)
|
||
|
||
Changes to past and future time zone abbreviations
|
||
|
||
Switch to numeric time zone abbreviations for South America, as
|
||
part of the ongoing project of removing invented abbreviations.
|
||
This avoids the need to invent an abbreviation for the new Chilean
|
||
new zone. Similarly, switch from invented to numeric time zone
|
||
abbreviations for Afghanistan, American Samoa, the Azores,
|
||
Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei,
|
||
Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is,
|
||
Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland,
|
||
Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia,
|
||
the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia,
|
||
Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau,
|
||
Papua New Guinea, the Philippines, Pitcairn, Qatar, Réunion, St
|
||
Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore,
|
||
Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and
|
||
Xinjiang; for 20-minute daylight saving time in Ghana before 1943;
|
||
for half-hour daylight saving time in Belize before 1944 and in
|
||
the Dominican Republic before 1975; and for Canary Islands before
|
||
1946, for Guinea-Bissau before 1975, for Iceland before 1969, for
|
||
Indian Summer Time before 1942, for Indonesia before around 1964,
|
||
for Kenya before 1960, for Liberia before 1973, for Madeira before
|
||
1967, for Namibia before 1943, for the Netherlands in 1937-9, for
|
||
Pakistan before 1971, for Western Sahara before 1977, and for
|
||
Zaporozhye in 1880-1924.
|
||
|
||
For Alaska time from 1900 through 1967, instead of "CAT" use the
|
||
abbreviation "AST", the abbreviation commonly used at the time
|
||
(Atlantic Standard Time had not been standardized yet). Use "AWT"
|
||
and "APT" instead of the invented abbreviations "CAWT" and "CAPT".
|
||
|
||
Use "CST" and "CDT" instead of invented abbreviations for Macau
|
||
before 1999 and Taiwan before 1938, and use "JST" instead of the
|
||
invented abbreviation "JCST" for Japan and Korea before 1938.
|
||
|
||
Change to database entry category
|
||
|
||
Move the Pacific/Johnston link from 'australasia' to 'backward',
|
||
since Johnston is now uninhabited.
|
||
|
||
Changes to code
|
||
|
||
zic no longer mishandles some transitions in January 2038 when it
|
||
attempts to work around Qt bug 53071. This fixes a bug affecting
|
||
Pacific/Tongatapu that was introduced in zic 2016e. localtime.c
|
||
now contains a workaround, useful when loading a file generated by
|
||
a buggy zic. (Problem and localtime.c fix reported by Bradley
|
||
White.)
|
||
|
||
zdump -i now outputs non-hour numeric time zone abbreviations
|
||
without a colon, e.g., "+0530" rather than "+05:30". This agrees
|
||
with zic %z and with common practice, and simplifies auditing of
|
||
zdump output.
|
||
|
||
zdump is now buildable again with -DUSE_LTZ=0.
|
||
(Problem reported by Joseph Myers.)
|
||
|
||
zdump.c now always includes private.h, to avoid code duplication
|
||
with private.h. (Problem reported by Kees Dekker.)
|
||
|
||
localtime.c no longer mishandles early or late timestamps
|
||
when TZ is set to a POSIX-style string that specifies DST.
|
||
(Problem reported by Kees Dekker.)
|
||
|
||
date and strftime now cause %z to generate "-0000" instead of
|
||
"+0000" when the UT offset is zero and the time zone abbreviation
|
||
begins with "-".
|
||
|
||
Changes to documentation and commentary
|
||
|
||
The 'Theory' file now better documents choice of historical time
|
||
zone abbreviations. (Problems reported by Michael Deckers.)
|
||
|
||
tz-link.htm now covers leap smearing, which is popular in clouds.
|
||
|
||
|
||
Release 2016j - 2016-11-22 23:17:13 -0800
|
||
|
||
Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04.
|
||
|
||
Changes to future timestamps
|
||
|
||
Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00.
|
||
This hives off a new zone Europe/Saratov from Europe/Volgograd.
|
||
(Thanks to Yuri Konotopov and Stepan Golosunov.)
|
||
|
||
Changes to past timestamps
|
||
|
||
The new zone Asia/Atyrau for Atyraū Region, Kazakhstan, is like
|
||
Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring
|
||
1999, not fall 1994. (Thanks to Stepan Golosunov.)
|
||
|
||
Changes to past time zone abbreviations
|
||
|
||
Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote
|
||
summer time before 1948. The old use of "EET" was a typo.
|
||
|
||
Changes to code
|
||
|
||
zic no longer mishandles file systems that lack hard links, fixing
|
||
bugs introduced in 2016g. (Problems reported by Tom Lane.)
|
||
Also, when the destination already contains symbolic links, zic
|
||
should now work better on systems where the 'link' system call
|
||
does not follow symbolic links.
|
||
|
||
Changes to documentation and commentary
|
||
|
||
tz-link.htm now documents the relationship between release version
|
||
numbers and development-repository commit tags. (Suggested by
|
||
Paul Koning.)
|
||
|
||
The 'Theory' file now documents UT.
|
||
|
||
iso3166.tab now accents "Curaçao", and commentary now mentions
|
||
the names "Cabo Verde" and "Czechia". (Thanks to Jiří Boháč.)
|
||
|
||
|
||
Release 2016i - 2016-11-01 23:19:52 -0700
|
||
|
||
Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga
|
||
reintroduces DST on 2016-11-06.
|
||
|
||
Changes to future timestamps
|
||
|
||
Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on
|
||
2017-01-15 at 03:00. Assume future observances in Tonga will be
|
||
from the first Sunday in November through the third Sunday in
|
||
January, like Fiji. (Thanks to Pulu ʻAnau.) Switch to numeric
|
||
time zone abbreviations for this zone.
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Northern Cyprus is now +03 year round, causing a split in Cyprus
|
||
time zones starting 2016-10-30 at 04:00. This creates a zone
|
||
Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.)
|
||
|
||
Antarctica/Casey switched from +08 to +11 on 2016-10-22.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
Changes to past timestamps
|
||
|
||
Several corrections were made for pre-1975 timestamps in Italy.
|
||
These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and
|
||
Europe/Vatican.
|
||
|
||
First, the 1893-11-01 00:00 transition in Italy used the new UT
|
||
offset (+01), not the old (+00:49:56). (Thanks to Michael
|
||
Deckers.)
|
||
|
||
Second, rules for daylight saving in Italy were changed to agree
|
||
with Italy's National Institute of Metrological Research (INRiM)
|
||
except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian
|
||
Inglis, and Michael Deckers):
|
||
|
||
The 1916-06-03 transition was at 24:00, not 00:00.
|
||
|
||
The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at
|
||
00:00, not 01:00.
|
||
|
||
The 1917-09-30 and 1918-10-06 transitions were at 24:00, not
|
||
01:00.
|
||
|
||
The 1944-09-17 transition was at 03:00, not 01:00. This
|
||
particular change is taken from Italian law as INRiM's table,
|
||
(which says 02:00) appears to have a typo here. Also, keep the
|
||
1944-04-03 transition for Europe/Rome, as Rome was controlled by
|
||
Germany then.
|
||
|
||
The 1967-1970 and 1972-1974 fallback transitions were at 01:00,
|
||
not 00:00.
|
||
|
||
Changes to code
|
||
|
||
The code should now be buildable on AmigaOS merely by setting the
|
||
appropriate Makefile variables. (From a patch by Carsten Larsen.)
|
||
|
||
|
||
Release 2016h - 2016-10-19 23:17:57 -0700
|
||
|
||
Changes to future timestamps
|
||
|
||
Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not
|
||
2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that
|
||
future fall transitions will be on the last Saturday of October
|
||
at 01:00, which is consistent with predicted spring transitions
|
||
on the last Saturday of March. (Thanks to Tim Parenti.)
|
||
|
||
Changes to past timestamps
|
||
|
||
In Turkey, transitions in 1986-1990 were at 01:00 standard time
|
||
not at 02:00, and the spring 1994 transition was on March 20, not
|
||
March 27. (Thanks to Kıvanç Yazan.)
|
||
|
||
Changes to past and future time zone abbreviations
|
||
|
||
Asia/Colombo now uses numeric time zone abbreviations like "+0530"
|
||
instead of alphabetic ones like "IST" and "LKT". Various
|
||
English-language sources use "IST", "LKT" and "SLST", with no
|
||
working consensus. (Usage of "SLST" mentioned by Sadika
|
||
Sumanapala.)
|
||
|
||
Changes to code
|
||
|
||
zic no longer mishandles relativizing file names when creating
|
||
symbolic links like /etc/localtime, when these symbolic links
|
||
are outside the usual directory hierarchy. This fixes a bug
|
||
introduced in 2016g. (Problem reported by Andreas Stieger.)
|
||
|
||
Changes to build procedure
|
||
|
||
New rules 'traditional_tarballs' and 'traditional_signatures' for
|
||
building just the traditional-format distribution. (Requested by
|
||
Deborah Goldsmith.)
|
||
|
||
The file 'version' is now put into the tzdata tarball too.
|
||
(Requested by Howard Hinnant.)
|
||
|
||
Changes to documentation and commentary
|
||
|
||
The 'Theory' file now has a section on interface stability.
|
||
(Requested by Paul Koning.) It also mentions features like
|
||
tm_zone and localtime_rz that have long been supported by the
|
||
reference code.
|
||
|
||
tz-link.htm has improved coverage of time zone boundaries suitable
|
||
for geolocation. (Thanks to heads-ups from Evan Siroky and Matt
|
||
Johnson.)
|
||
|
||
The US commentary now mentions Allen and the "day of two noons".
|
||
|
||
The Fiji commentary mentions the government's 2016-10-03 press
|
||
release. (Thanks to Raymond Kumar.)
|
||
|
||
|
||
Release 2016g - 2016-09-13 08:56:38 -0700
|
||
|
||
Changes to future timestamps
|
||
|
||
Turkey switched from EET/EEST (+02/+03) to permanent +03,
|
||
effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather
|
||
than an invented abbreviation for the new time.
|
||
|
||
New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52.
|
||
(Thanks to Tim Parenti.)
|
||
|
||
Changes to past timestamps
|
||
|
||
For America/Los_Angeles, spring-forward transition times have been
|
||
corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in
|
||
1950-1966.
|
||
|
||
For zones using Soviet time on 1919-07-01, transitions to UT-based
|
||
time were at 00:00 UT, not at 02:00 local time. The affected
|
||
zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and
|
||
Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.)
|
||
|
||
Changes to past and future time zone abbreviations
|
||
|
||
The Factory zone now uses the time zone abbreviation -00 instead
|
||
of a long English-language string, as -00 is now the normal way to
|
||
represent an undefined time zone.
|
||
|
||
Several zones in Antarctica and the former Soviet Union, along
|
||
with zones intended for ships at sea that cannot use POSIX TZ
|
||
strings, now use numeric time zone abbreviations instead of
|
||
invented or obsolete alphanumeric abbreviations. The affected
|
||
zones are Antarctica/Casey, Antarctica/Davis,
|
||
Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera,
|
||
Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok,
|
||
Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita,
|
||
Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga,
|
||
Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin,
|
||
Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi,
|
||
Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg,
|
||
Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11,
|
||
Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5,
|
||
Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2,
|
||
Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8,
|
||
Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad,
|
||
Europe/Minsk, Europe/Samara, Europe/Volgograd, and
|
||
Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM
|
||
was replaced by +05, whereas MSK and MSD were kept as they are not
|
||
our invention and are widely used.
|
||
|
||
Changes to zone names
|
||
|
||
Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link.
|
||
(Thanks to David Massoud.)
|
||
|
||
Changes to code
|
||
|
||
zic no longer generates binary files containing POSIX TZ-like
|
||
strings that disagree with the local time type after the last
|
||
explicit transition in the data. This fixes a bug with
|
||
Africa/Casablanca and Africa/El_Aaiun in some year-2037 timestamps
|
||
on the reference platform. (Thanks to Alexander Belopolsky for
|
||
reporting the bug and suggesting a way forward.)
|
||
|
||
If the installed localtime and/or posixrules files are symbolic
|
||
links, zic now keeps them symbolic links when updating them, for
|
||
compatibility with platforms like OpenSUSE where other programs
|
||
configure these files as symlinks.
|
||
|
||
zic now avoids hard linking to symbolic links, avoids some
|
||
unnecessary mkdir and stat system calls, and uses shorter file
|
||
names internally.
|
||
|
||
zdump has a new -i option to generate transitions in a
|
||
more-compact but still human-readable format. This option is
|
||
experimental, and the output format may change in future versions.
|
||
(Thanks to Jon Skeet for suggesting that an option was needed,
|
||
and thanks to Tim Parenti and Chris Rovick for further comments.)
|
||
|
||
Changes to build procedure
|
||
|
||
An experimental distribution format is available, in addition
|
||
to the traditional format which will continue to be distributed.
|
||
The new format is a tarball tzdb-VERSION.tar.lz with signature
|
||
file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory
|
||
tzdb-VERSION containing the code and data of the traditional
|
||
two-tarball format, along with extra data that may be useful.
|
||
(Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others
|
||
for comments about the experimental format.)
|
||
|
||
The release version number is now more accurate in the usual case
|
||
where releases are built from a Git repository. For example, if
|
||
23 commits and some working-file changes have been made since
|
||
release 2016g, the version number is now something like
|
||
'2016g-23-g50556e3-dirty' instead of the misleading '2016g'.
|
||
Tagged releases use the same version number format as before,
|
||
e.g., '2016g'. To support the more-accurate version number, its
|
||
specification has moved from a line in the Makefile to a new
|
||
source file 'version'.
|
||
|
||
The experimental distribution contains a file to2050.tzs that
|
||
contains what should be the output of 'zdump -i -c 2050' on
|
||
primary zones. If this file is available, 'make check' now checks
|
||
that zdump generates this output.
|
||
|
||
'make check_web' now works on Fedora-like distributions.
|
||
|
||
Changes to documentation and commentary
|
||
|
||
tzfile.5 now documents the new restriction on POSIX TZ-like
|
||
strings that is now implemented by zic.
|
||
|
||
Comments now cite URLs for some 1917-1921 Russian DST decrees.
|
||
(Thanks to Alexander Belopolsky.)
|
||
|
||
tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J
|
||
(thanks to Meno Hochschild) and ThreeTen-Extra, and its
|
||
description of Java 8 has been brought up to date (thanks to
|
||
Stephen Colebourne). Its description of local time on Mars has
|
||
been updated to match current practice, and URLs have been updated
|
||
and some obsolete ones removed.
|
||
|
||
|
||
Release 2016f - 2016-07-05 16:26:51 +0200
|
||
|
||
Changes affecting future timestamps
|
||
|
||
The Egyptian government changed its mind on short notice, and
|
||
Africa/Cairo will not introduce DST starting 2016-07-07 after all.
|
||
(Thanks to Mina Samuel.)
|
||
|
||
Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00.
|
||
(Thanks to Stepan Golosunov.)
|
||
|
||
Changes to past and future timestamps
|
||
|
||
Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone
|
||
abbreviations instead of invented ones.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00.
|
||
(Thanks to Stepan Golosunov.)
|
||
|
||
|
||
Release 2016e - 2016-06-14 08:46:16 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Africa/Cairo observes DST in 2016 from July 7 to the end of October.
|
||
Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.)
|
||
For future years, guess April's last Thursday to October's last
|
||
Thursday except for Ramadan.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Locations while uninhabited now use '-00', not 'zzz', as a
|
||
placeholder time zone abbreviation. This is inspired by Internet
|
||
RFC 3339 and is more consistent with numeric time zone
|
||
abbreviations already used elsewhere. The change affects several
|
||
arctic and antarctic locations, e.g., America/Cambridge_Bay before
|
||
1920 and Antarctica/Troll before 2005.
|
||
|
||
Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was
|
||
at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.)
|
||
|
||
Changes to code
|
||
|
||
zic now outputs a dummy transition at time 2**31 - 1 in zones
|
||
whose POSIX-style TZ strings contain a '<'. This mostly works
|
||
around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>.
|
||
(Thanks to Zhanibek Adilbekov for reporting the Qt bug.)
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
tz-link.htm says why governments should give plenty of notice for
|
||
time zone or DST changes, and refers to Matt Johnson's blog post.
|
||
|
||
tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.)
|
||
|
||
|
||
Release 2016d - 2016-04-17 22:50:29 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30.
|
||
(Thanks to Alexander Krivenyshev for the heads-up.)
|
||
|
||
Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00.
|
||
(Thanks to Alexander Krivenyshev and Matt Johnson.)
|
||
|
||
New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers
|
||
Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29
|
||
at 02:00. (Thanks to Stepan Golosunov.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
New zone Europe/Kirov, split off from Europe/Volgograd. It covers
|
||
Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on
|
||
1989-03-26 at 02:00, roughly a year after Europe/Volgograd made
|
||
the same change. (Thanks to Stepan Golosunov.)
|
||
|
||
Russia and nearby locations had daylight-saving transitions on
|
||
1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on
|
||
1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan
|
||
Golosunov.)
|
||
|
||
Many corrections to historical time in Kazakhstan from 1991
|
||
through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's
|
||
invented time zone abbreviations with numeric abbreviations.
|
||
|
||
Changes to commentary
|
||
|
||
Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references).
|
||
|
||
|
||
Release 2016c - 2016-03-23 00:51:27 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.)
|
||
|
||
Chile reverts from permanent to seasonal DST. (Thanks to Juan
|
||
Correa for the heads-up, and to Tim Parenti for corrections.)
|
||
Guess that future transitions are August's and May's second
|
||
Saturdays at 24:00 mainland time. Also, call the period from
|
||
2014-09-07 through 2016-05-14 daylight saving time instead of
|
||
standard time, as that seems more appropriate now.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to
|
||
+02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed
|
||
from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26.
|
||
(Thanks to Stepan Golosunov.)
|
||
|
||
Changes to commentary
|
||
|
||
Several updates and URLs for historical and proposed Russian changes.
|
||
(Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.)
|
||
|
||
|
||
Release 2016b - 2016-03-12 17:30:14 -0800
|
||
|
||
Compatibility note
|
||
|
||
Starting with release 2016b, some data entries cause zic implementations
|
||
derived from tz releases 2005j through 2015e to issue warnings like
|
||
"time zone abbreviation differs from POSIX standard (+03)".
|
||
These warnings should not otherwise affect zic's output and can safely be
|
||
ignored on today's platforms, as the warnings refer to a restriction in
|
||
POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the
|
||
warnings is to upgrade to zic derived from tz releases 2015f and later.
|
||
|
||
Changes affecting future timestamps
|
||
|
||
New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and
|
||
Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on
|
||
2016-03-27 at 02:00 local time. They need distinct zones since their
|
||
post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and
|
||
Altai Republic, Russia, which will switch from +06 to +07 on the same date
|
||
and local time. The Astrakhan change is already official; the others have
|
||
passed the first reading in the State Duma and are extremely likely.
|
||
Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00.
|
||
(Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson
|
||
and Stepan Golosunov for followup.)
|
||
|
||
As a trial of a new system that needs less information to be made up,
|
||
the new zones use numeric time zone abbreviations like "+04"
|
||
instead of invented abbreviations like "ASTT".
|
||
|
||
Haiti will not observe DST in 2016. (Thanks to Jean Antoine via
|
||
Steffen Thorsen.)
|
||
|
||
Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00.
|
||
(Thanks to Hannah Kreitem.) Guess future transitions will be March's last
|
||
Saturday at 01:00, not March's last Friday at 24:00.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Europe/Chisinau observed DST during 1990, and switched from +04 to
|
||
+03 at 1990-05-06 02:00, instead of switching from +03 to +02.
|
||
(Thanks to Stepan Golosunov.)
|
||
|
||
1991 abbreviations in Europe/Samara should be SAMT/SAMST, not
|
||
KUYT/KUYST. (Thanks to Stepan Golosunov.)
|
||
|
||
Changes to code
|
||
|
||
tzselect's diagnostics and checking, and checktab.awk's checking,
|
||
have been improved. (Thanks to J William Piggott.)
|
||
|
||
tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.)
|
||
|
||
tzselect now tests Julian-date TZ settings more accurately.
|
||
(Thanks to J William Piggott.)
|
||
|
||
Changes to commentary
|
||
|
||
Comments in zone tables have been improved. (Thanks to J William Piggott.)
|
||
|
||
tzselect again limits its menu comments so that menus fit on a
|
||
24×80 alphanumeric display.
|
||
|
||
A new web page tz-how-to.html. (Thanks to Bill Seymour.)
|
||
|
||
In the Theory file, the description of possible time zone abbreviations in
|
||
tzdata has been cleaned up, as the old description was unclear and
|
||
inconsistent. (Thanks to Alain Mouette for reporting the problem.)
|
||
|
||
|
||
Release 2016a - 2016-01-26 23:28:02 -0800
|
||
|
||
Changes affecting future timestamps
|
||
|
||
America/Cayman will not observe daylight saving this year after all.
|
||
Revert our guess that it would. (Thanks to Matt Johnson.)
|
||
|
||
Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00.
|
||
(Thanks to Alexander Krivenyshev.)
|
||
|
||
Asia/Tehran now has DST predictions for the year 2038 and later,
|
||
to be March 21 00:00 to September 21 00:00. This is likely better
|
||
than predicting no DST, albeit off by a day every now and then.
|
||
|
||
Changes affecting past and future timestamps
|
||
|
||
America/Metlakatla switched from PST all year to AKST/AKDT on
|
||
2015-11-01 at 02:00. (Thanks to Steffen Thorsen.)
|
||
|
||
America/Santa_Isabel has been removed, and replaced with a
|
||
backward compatibility link to America/Tijuana. Its contents were
|
||
apparently based on a misreading of Mexican legislation.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Asia/Karachi's two transition times in 2002 were off by a minute.
|
||
(Thanks to Matt Johnson.)
|
||
|
||
Changes affecting build procedure
|
||
|
||
An installer can now combine leap seconds with use of the backzone file,
|
||
e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'.
|
||
The old 'make posix_packrat' rule is now marked as obsolescent.
|
||
(Thanks to Ian Abbott for an initial implementation.)
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
A new file LICENSE makes it easier to see that the code and data
|
||
are mostly public-domain. (Thanks to James Knight.) The three
|
||
non-public-domain files now use the current (3-clause) BSD license
|
||
instead of older versions of that license.
|
||
|
||
tz-link.htm mentions the BDE library (thanks to Andrew Paprocki),
|
||
CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section
|
||
on editing tz source files (with a mention of Sublime zoneinfo,
|
||
thanks to Gilmore Davidson).
|
||
|
||
The Theory and asia files now mention the 2015 book "The Global
|
||
Transformation of Time, 1870-1950", and cite a couple of reviews.
|
||
|
||
The America/Chicago entry now documents the informal use of US
|
||
central time in Fort Pierre, South Dakota. (Thanks to Rick
|
||
McDermid, Matt Johnson, and Steve Jones.)
|
||
|
||
|
||
Release 2015g - 2015-10-01 00:39:51 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25.
|
||
(Thanks to Fatih.)
|
||
|
||
Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time.
|
||
(Thanks to Alexander Krivenyshev.)
|
||
|
||
Fiji's 2016 fall-back transition is scheduled for January 17, not 24.
|
||
(Thanks to Ken Rylander.)
|
||
|
||
Fort Nelson, British Columbia will not fall back on 2015-11-01. It has
|
||
effectively been on MST (-0700) since it advanced its clocks on 2015-03-08.
|
||
New zone America/Fort_Nelson. (Thanks to Matt Johnson.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00.
|
||
|
||
Changes affecting code
|
||
|
||
localtime no longer mishandles America/Anchorage after 2037.
|
||
(Thanks to Bradley White for reporting the bug.)
|
||
|
||
On hosts with signed 32-bit time_t, localtime no longer mishandles
|
||
Pacific/Fiji after 2038-01-16 14:00 UTC.
|
||
|
||
The localtime module allows the variables 'timezone', 'daylight',
|
||
and 'altzone' to be in common storage shared with other modules,
|
||
and declares them in case the system <time.h> does not.
|
||
(Problems reported by Kees Dekker.)
|
||
|
||
On platforms with tm_zone, strftime.c now assumes it is not NULL.
|
||
This simplifies the code and is consistent with zdump.c.
|
||
(Problem reported by Christos Zoulas.)
|
||
|
||
Changes affecting documentation
|
||
|
||
The tzfile man page now documents that transition times denote the
|
||
starts (not the ends) of the corresponding time periods.
|
||
(Ambiguity reported by Bill Seymour.)
|
||
|
||
|
||
Release 2015f - 2015-08-10 18:06:56 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.)
|
||
The abbreviation remains "KST". (Thanks to Robert Elz.)
|
||
|
||
Uruguay no longer observes DST. (Thanks to Steffen Thorsen
|
||
and Pablo Camargo.)
|
||
|
||
Changes affecting past and future timestamps
|
||
|
||
Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC.
|
||
(Thanks to Roman Tudos.)
|
||
|
||
Changes affecting data format and code
|
||
|
||
zic's '-y YEARISTYPE' option is no longer documented. The TYPE
|
||
field of a Rule line should now be '-'; the old values 'even',
|
||
'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented.
|
||
Although the implementation has not changed, these features do not
|
||
work in the default installation, they are not used in the data,
|
||
and they are now considered obsolescent.
|
||
|
||
zic now checks that two rules don't take effect at the same time.
|
||
(Thanks to Jon Skeet and Arthur David Olson.) Constraints on
|
||
simultaneity are now documented.
|
||
|
||
The two characters '%z' in a zone format now stand for the UT
|
||
offset, e.g., '-07' for seven hours behind UT and '+0530' for
|
||
five hours and thirty minutes ahead. This better supports time
|
||
zone abbreviations conforming to POSIX.1-2001 and later.
|
||
|
||
Changes affecting installed data files
|
||
|
||
Comments for America/Halifax and America/Glace_Bay have been improved.
|
||
(Thanks to Brian Inglis.)
|
||
|
||
Data entries have been simplified for Atlantic/Canary, Europe/Simferopol,
|
||
Europe/Sofia, and Europe/Tallinn. This yields slightly smaller
|
||
installed data files for Europe/Simferopol and Europe/Tallinn.
|
||
It does not affect timestamps. (Thanks to Howard Hinnant.)
|
||
|
||
Changes affecting code
|
||
|
||
zdump and zic no longer warn about valid time zone abbreviations
|
||
like '-05'.
|
||
|
||
Some Visual Studio 2013 warnings have been suppressed.
|
||
(Thanks to Kees Dekker.)
|
||
|
||
'date' no longer sets the time of day and its -a, -d, -n and -t
|
||
options have been removed. Long obsolescent, the implementation
|
||
of these features had porting problems. Builders no longer need
|
||
to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H.
|
||
(Thanks to Kees Dekker for pointing out the problem.)
|
||
|
||
Changes affecting documentation
|
||
|
||
The Theory file mentions naming issues earlier, as these seem to be
|
||
poorly publicized (thanks to Gilmore Davidson for reporting the problem).
|
||
|
||
tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant).
|
||
|
||
Mention that Herbert Samuel introduced the term "Summer Time".
|
||
|
||
|
||
Release 2015e - 2015-06-13 10:56:02 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00,
|
||
not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.)
|
||
|
||
Assume Cayman Islands will observe DST starting next year, using US rules.
|
||
Although it isn't guaranteed, it is the most likely.
|
||
|
||
Changes affecting data format
|
||
|
||
The file 'iso3166.tab' now uses UTF-8, so that its entries can better
|
||
spell the names of Åland Islands, Côte d'Ivoire, and Réunion.
|
||
|
||
Changes affecting code
|
||
|
||
When displaying data, tzselect converts it to the current locale's
|
||
encoding if the iconv command works. (Problem reported by random832.)
|
||
|
||
tzselect no longer mishandles Dominica, fixing a bug introduced
|
||
in Release 2014f. (Problem reported by Owen Leibman.)
|
||
|
||
zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\".
|
||
This fixes a bug introduced in Release 2014f.
|
||
(Problem reported by Leonardo Chiquitto.)
|
||
|
||
|
||
Release 2015d - 2015-04-24 08:09:46 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Egypt will not observe DST in 2015 and will consider canceling it
|
||
permanently. For now, assume no DST indefinitely.
|
||
(Thanks to Ahmed Nazmy and Tim Parenti.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not
|
||
1966-07-01. Also, Yukon's time zone history is documented better.
|
||
(Thanks to Brian Inglis and Dennis Ferguson.)
|
||
|
||
Change affecting past and future time zone abbreviations
|
||
|
||
The abbreviations for Hawaii-Aleutian standard and daylight times
|
||
have been changed from HAST/HADT to HST/HDT, as per US Government
|
||
Printing Office style. This affects only America/Adak since 1983,
|
||
as America/Honolulu was already using the new style.
|
||
|
||
Changes affecting code
|
||
|
||
zic has some minor performance improvements.
|
||
|
||
|
||
Release 2015c - 2015-04-11 08:55:55 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Egypt's spring-forward transition is at 24:00 on April's last Thursday,
|
||
not 00:00 on April's last Friday. 2015's transition will therefore be on
|
||
Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes
|
||
apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
The following changes affect some pre-1991 Chile-related timestamps
|
||
in America/Santiago, Antarctica/Palmer, and Pacific/Easter.
|
||
|
||
The 1910 transition was January 10, not January 1.
|
||
|
||
The 1918 transition was September 10, not September 1.
|
||
|
||
The UT -04 time observed from 1932 to 1942 is now considered to
|
||
be standard time, not year-round DST.
|
||
|
||
Santiago observed DST (UT -03) from 1946-07-15 through
|
||
1946-08-31, then reverted to standard time, then switched to -05
|
||
on 1947-04-01.
|
||
|
||
Assume transitions before 1968 were at 00:00, since we have no data
|
||
saying otherwise.
|
||
|
||
The spring 1988 transition was 1988-10-09, not 1988-10-02.
|
||
The fall 1990 transition was 1990-03-11, not 1990-03-18.
|
||
|
||
Assume no UT offset change for Pacific/Easter on 1890-01-01,
|
||
and omit all transitions on Pacific/Easter from 1942 through 1946
|
||
since we have no data suggesting that they existed.
|
||
|
||
One more zone has been turned into a link, as it differed
|
||
from an existing zone only for older timestamps. As usual,
|
||
this change affects UT offsets in pre-1970 timestamps only.
|
||
The zone's old contents have been moved to the 'backzone' file.
|
||
The affected zone is America/Montreal.
|
||
|
||
Changes affecting commentary
|
||
|
||
Mention the TZUpdater tool.
|
||
|
||
Mention "The Time Now". (Thanks to Brandon Ramsey.)
|
||
|
||
|
||
Release 2015b - 2015-03-19 23:28:11 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Mongolia will start observing DST again this year, from the last
|
||
Saturday in March at 02:00 to the last Saturday in September at 00:00.
|
||
(Thanks to Ganbold Tsagaankhuu.)
|
||
|
||
Palestine will start DST on March 28, not March 27. Also,
|
||
correct the fall 2014 transition from September 26 to October 24.
|
||
Adjust future predictions accordingly. (Thanks to Steffen Thorsen.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a
|
||
regression. (Thanks to Stuart Bishop for reporting the problem.)
|
||
|
||
Some more zones have been turned into links, when they differed
|
||
from existing zones only for older timestamps. As usual,
|
||
these changes affect UT offsets in pre-1970 timestamps only.
|
||
Their old contents have been moved to the 'backzone' file.
|
||
The affected zones are: America/Antigua, America/Cayman,
|
||
Pacific/Midway, and Pacific/Saipan.
|
||
|
||
Changes affecting time zone abbreviations
|
||
|
||
Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD".
|
||
(Thanks to Hank W.)
|
||
|
||
Changes affecting code
|
||
|
||
Fix integer overflow bug in reference 'mktime' implementation.
|
||
(Problem reported by Jörg Richter.)
|
||
|
||
Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries
|
||
to be used in the same executable as standard-library time_t functions.
|
||
(Problems reported by Bradley White.)
|
||
|
||
Changes affecting commentary
|
||
|
||
Cite the recent Mexican decree changing Quintana Roo's time zone.
|
||
(Thanks to Carlos Raúl Perasso.)
|
||
|
||
Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.)
|
||
|
||
Update info about Mars time.
|
||
|
||
|
||
Release 2015a - 2015-01-29 22:35:20 -0800
|
||
|
||
Changes affecting future timestamps
|
||
|
||
The Mexican state of Quintana Roo, represented by America/Cancun,
|
||
will shift from Central Time with DST to Eastern Time without DST
|
||
on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.)
|
||
|
||
Chile will not change clocks in April or thereafter; its new standard time
|
||
will be its old daylight saving time. This affects America/Santiago,
|
||
Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.)
|
||
|
||
New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
|
||
(Thanks to Tim Parenti.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Iceland observed DST in 1919 and 1921, and its 1939 fallback
|
||
transition was Oct. 29, not Nov. 29. Remove incorrect data from
|
||
Shanks about time in Iceland between 1837 and 1908.
|
||
|
||
Some more zones have been turned into links, when they differed
|
||
from existing zones only for older timestamps. As usual,
|
||
these changes affect UT offsets in pre-1970 timestamps only.
|
||
Their old contents have been moved to the 'backzone' file.
|
||
The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
|
||
and Asia/Muscat.
|
||
|
||
Changes affecting code
|
||
|
||
tzalloc now scrubs time zone abbreviations compatibly with the way
|
||
that tzset always has, by replacing invalid bytes with '_' and by
|
||
shortening too-long abbreviations.
|
||
|
||
tzselect ports to POSIX awk implementations, no longer mishandles
|
||
POSIX TZ settings when GNU awk is used, and reports POSIX TZ
|
||
settings to the user. (Thanks to Stefan Kuhn.)
|
||
|
||
Changes affecting build procedure
|
||
|
||
'make check' now checks for links to links in the data.
|
||
One such link (for Africa/Asmera) has been fixed.
|
||
(Thanks to Stephen Colebourne for pointing out the problem.)
|
||
|
||
Changes affecting commentary
|
||
|
||
The leapseconds file commentary now mentions the expiration date.
|
||
(Problem reported by Martin Burnicki.)
|
||
|
||
Update Mexican Library of Congress URL.
|
||
|
||
|
||
Release 2014j - 2014-11-10 17:37:11 -0800
|
||
|
||
Changes affecting current and future timestamps
|
||
|
||
Turks & Caicos' switch from US eastern time to UT -04 year-round
|
||
did not occur on 2014-11-02 at 02:00. It's currently scheduled
|
||
for 2015-11-01 at 02:00. (Thanks to Chris Walton.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Many pre-1989 timestamps have been corrected for Asia/Seoul and
|
||
Asia/Pyongyang, based on sources for the Korean-language Wikipedia
|
||
entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no
|
||
longer guess that Pyongyang mimicked Seoul time after World War II,
|
||
as this is politically implausible.
|
||
|
||
Some more zones have been turned into links, when they differed
|
||
from existing zones only for older timestamps. As usual,
|
||
these changes affect UT offsets in pre-1970 timestamps only.
|
||
Their old contents have been moved to the 'backzone' file.
|
||
The affected zones are: Africa/Addis_Ababa, Africa/Asmara,
|
||
Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala,
|
||
Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and
|
||
Indian/Mayotte.
|
||
|
||
Changes affecting commentary
|
||
|
||
The commentary is less enthusiastic about Shanks as a source,
|
||
and is more careful to distinguish UT from UTC.
|
||
|
||
|
||
Release 2014i - 2014-10-21 22:04:57 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00.
|
||
(Thanks to Ken Rylander for the heads-up.) Guess that future
|
||
years will use a similar pattern.
|
||
|
||
A new Zone Pacific/Bougainville, for the part of Papua New Guinea
|
||
that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00.
|
||
(Thanks to Kiley Walbom for the heads-up.)
|
||
|
||
Changes affecting time zone abbreviations
|
||
|
||
Since Belarus is not changing its clocks even though Moscow is,
|
||
the time zone abbreviation in Europe/Minsk is changing from FET
|
||
to its more-traditional value MSK on 2014-10-26 at 01:00.
|
||
(Thanks to Alexander Bokovoy for the heads-up about Belarus.)
|
||
|
||
The new abbreviation IDT stands for the pre-1976 use of UT +08 in
|
||
Indochina, to distinguish it better from ICT (+07).
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Many timestamps have been corrected for Asia/Ho_Chi_Minh before 1976
|
||
(thanks to Trần Ngọc Quân for an indirect pointer to Trần Tiến Bình's
|
||
authoritative book). Asia/Ho_Chi_Minh has been added to
|
||
zone1970.tab, to give tzselect users in Vietnam two choices,
|
||
since north and south Vietnam disagreed after our 1970 cutoff.
|
||
|
||
Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as
|
||
they differed from existing zones only for older timestamps. As
|
||
usual, these changes affect pre-1970 timestamps only. Their old
|
||
contents have been moved to the 'backzone' file.
|
||
|
||
Changes affecting code
|
||
|
||
The time-related library functions now set errno on failure, and
|
||
some crashes in the new tzalloc-related library functions have
|
||
been fixed. (Thanks to Christos Zoulas for reporting most of
|
||
these problems and for suggesting fixes.)
|
||
|
||
If USG_COMPAT is defined and the requested timestamp is standard time,
|
||
the tz library's localtime and mktime functions now set the extern
|
||
variable timezone to a value appropriate for that timestamp; and
|
||
similarly for ALTZONE, daylight saving time, and the altzone variable.
|
||
This change is a companion to the tzname change in 2014h, and is
|
||
designed to make timezone and altzone more compatible with tzname.
|
||
|
||
The tz library's functions now set errno to EOVERFLOW if they fail
|
||
because the result cannot be represented. ctime and ctime_r now
|
||
return NULL and set errno when a timestamp is out of range, rather
|
||
than having undefined behavior.
|
||
|
||
Some bugs associated with the new 2014g functions have been fixed.
|
||
This includes a bug that largely incapacitated the new functions
|
||
time2posix_z and posix2time_z. (Thanks to Christos Zoulas.)
|
||
It also includes some uses of uninitialized variables after tzalloc.
|
||
The new code uses the standard type 'ssize_t', which the Makefile
|
||
now gives porting advice about.
|
||
|
||
Changes affecting commentary
|
||
|
||
Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis).
|
||
|
||
|
||
Release 2014h - 2014-09-25 18:59:03 -0700
|
||
|
||
Changes affecting past timestamps
|
||
|
||
America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
|
||
|
||
Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
|
||
not 1920-01-06. The old entry was based on a misinterpretation of Shanks.
|
||
|
||
Some more zones have been turned into links, when they differed
|
||
from existing zones only for older timestamps. As usual,
|
||
these changes affect UT offsets in pre-1970 timestamps only.
|
||
Their old contents have been moved to the 'backzone' file.
|
||
The affected zones are: Africa/Blantyre, Africa/Bujumbura,
|
||
Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
|
||
Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.
|
||
|
||
Changes affecting code
|
||
|
||
zdump -V and -v now output gmtoff= values on all platforms,
|
||
not merely on platforms defining TM_GMTOFF.
|
||
|
||
The tz library's localtime and mktime functions now set tzname to a value
|
||
appropriate for the requested timestamp, and zdump now uses this
|
||
on platforms not defining TM_ZONE, fixing a 2014g regression.
|
||
(Thanks to Tim Parenti for reporting the problem.)
|
||
|
||
The tz library no longer sets tzname if localtime or mktime fails.
|
||
|
||
zdump -c no longer mishandles transitions near year boundaries.
|
||
(Thanks to Tim Parenti for reporting the problem.)
|
||
|
||
An access to uninitialized data has been fixed.
|
||
(Thanks to Jörg Richter for reporting the problem.)
|
||
|
||
When THREAD_SAFE is defined, the code ports to the C11 memory model.
|
||
A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
|
||
and two threads race to initialize data used by gmtime-like functions.
|
||
(Thanks to Andy Heninger for reporting the problems.)
|
||
|
||
Changes affecting build procedure
|
||
|
||
'make check' now checks better for properly-sorted data.
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
zdump's gmtoff=N output is now documented, and its isdst=D output
|
||
is now documented to possibly output D values other than 0 or 1.
|
||
|
||
zdump -c's treatment of years is now documented to use the
|
||
Gregorian calendar and Universal Time without leap seconds,
|
||
and its behavior at cutoff boundaries is now documented better.
|
||
(Thanks to Arthur David Olson and Tim Parenti for reporting the problems.)
|
||
|
||
Programs are now documented to use the proleptic Gregorian calendar.
|
||
(Thanks to Alan Barrett for the suggestion.)
|
||
|
||
Fractional-second GMT offsets have been documented for civil time
|
||
in 19th-century Chennai, Jakarta, and New York.
|
||
|
||
|
||
Release 2014g - 2014-08-28 12:31:23 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Turks & Caicos is switching from US eastern time to UT -04
|
||
year-round, modeled as a switch on 2014-11-02 at 02:00.
|
||
[As noted in 2014j, this switch was later delayed.]
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Time in Russia or the USSR before 1926 or so has been corrected by
|
||
a few seconds in the following zones: Asia/Irkutsk,
|
||
Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi,
|
||
Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For
|
||
Asia/Yekaterinburg the correction is a few minutes. (Thanks to
|
||
Vladimir Karpinsky.)
|
||
|
||
The Portuguese decree of 1911-05-26 took effect on 1912-01-01.
|
||
This affects 1911 timestamps in Africa/Bissau, Africa/Luanda,
|
||
Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912
|
||
GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32.
|
||
(Thanks to Stephen Colebourne for pointing to the decree.)
|
||
|
||
Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59.
|
||
|
||
A new file 'backzone' contains data which may appeal to
|
||
connoisseurs of old timestamps, although it is out of scope for
|
||
the tz database, is often poorly sourced, and contains some data
|
||
that is known to be incorrect. The new file is not recommended
|
||
for ordinary use and its entries are not installed by default.
|
||
(Thanks to Lester Caine for the high-quality Jersey, Guernsey, and
|
||
Isle of Man entries.)
|
||
|
||
Some more zones have been turned into links, when they differed
|
||
from existing zones only for older timestamps. As usual,
|
||
these changes affect UT offsets in pre-1970 timestamps only.
|
||
Their old contents have been moved to the 'backzone' file.
|
||
The affected zones are: Africa/Bangui, Africa/Brazzaville,
|
||
Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
|
||
Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo.
|
||
|
||
Changes affecting code
|
||
|
||
Unless NETBSD_INSPIRED is defined to 0, the tz library now
|
||
supplies functions for creating and using objects that represent
|
||
timezones. The new functions are tzalloc, tzfree, localtime_rz,
|
||
mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and
|
||
time2posix_z. They are intended for performance: for example,
|
||
localtime_rz (unlike localtime_r) is trivially thread-safe without
|
||
locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired
|
||
functions, and to Alan Barrett and Jonathan Lennox for helping to
|
||
debug the change.)
|
||
|
||
zdump now builds with the tz library unless USE_LTZ is defined to 0,
|
||
This lets zdump use tz features even if the system library lacks them.
|
||
To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0
|
||
TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='.
|
||
|
||
zdump now uses localtime_rz if available, as it's significantly faster,
|
||
and it can help zdump better diagnose invalid timezone names.
|
||
Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ
|
||
defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is
|
||
not available, zdump now uses localtime_r and tzset if available,
|
||
as this is a bit cleaner and faster than plain localtime. Compile
|
||
with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system
|
||
lacks these two functions.
|
||
|
||
If THREAD_SAFE is defined to 1, the tz library is now thread-safe.
|
||
Although not needed for tz's own applications, which are single-threaded,
|
||
this supports POSIX better if the tz library is used in multithreaded apps.
|
||
|
||
Some crashes have been fixed when zdump or the tz library is given
|
||
invalid or outlandish input.
|
||
|
||
The tz library no longer mishandles leap seconds on platforms with
|
||
unsigned time_t in timezones that lack ordinary transitions after 1970.
|
||
|
||
The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not
|
||
already defined, to make it easier to configure on common platforms.
|
||
Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this.
|
||
|
||
Unless the new macro UNINIT_TRAP is defined to 1, the tz code now
|
||
assumes that reading uninitialized memory yields garbage values
|
||
but does not cause other problems such as traps.
|
||
|
||
If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now
|
||
more likely to guess right for ambiguous timestamps near
|
||
transitions where tm_isdst does not change.
|
||
|
||
If HAVE_STRFTIME_L is defined to 1, the tz library now defines
|
||
strftime_l for compatibility with recent versions of POSIX.
|
||
Only the C locale is supported, though. HAVE_STRFTIME_L defaults
|
||
to 1 on recent POSIX versions, and to 0 otherwise.
|
||
|
||
tzselect -c now uses a hybrid distance measure that works better
|
||
in Africa. (Thanks to Alan Barrett for noting the problem.)
|
||
|
||
The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used,
|
||
or when time_tz is defined.
|
||
|
||
When HAVE_UTMPX_H is set the 'date' command now builds on systems
|
||
whose <utmpx.h> file does not define WTMPX_FILE, and when setting
|
||
the date it updates the wtmpx file if _PATH_WTMPX is defined.
|
||
This affects GNU/Linux and similar systems.
|
||
|
||
For easier maintenance later, some C code has been simplified,
|
||
some lint has been removed, and the code has been tweaked so that
|
||
plain 'make' is more likely to work.
|
||
|
||
The C type 'bool' is now used for boolean values, instead of 'int'.
|
||
|
||
The long-obsolete LOCALE_HOME code has been removed.
|
||
|
||
The long-obsolete 'gtime' function has been removed.
|
||
|
||
Changes affecting build procedure
|
||
|
||
'zdump' no longer links in ialloc.o, as it's not needed.
|
||
|
||
'make check_time_t_alternatives' no longer assumes GNU diff.
|
||
|
||
Changes affecting distribution tarballs
|
||
|
||
The files checktab.awk and zoneinfo2tdf.pl are now distributed in
|
||
the tzdata tarball instead of the tzcode tarball, since they help
|
||
maintain the data. The NEWS and Theory files are now also
|
||
distributed in the tzdata tarball, as they're relevant for data.
|
||
(Thanks to Alan Barrett for pointing this out.) Also, the
|
||
leapseconds.awk file is no longer distributed in the tzcode
|
||
tarball, since it belongs in the tzdata tarball (where 2014f
|
||
inadvertently also distributed it).
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for
|
||
suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms
|
||
for debugging it.)
|
||
|
||
The man pages have been updated to use function prototypes,
|
||
to document thread-safe variants like localtime_r, and to document
|
||
the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and
|
||
mktime_z.
|
||
|
||
The fields in Link lines have been renamed to be more descriptive
|
||
and more like the parameters of 'ln'. LINK-FROM has become TARGET,
|
||
and LINK-TO has become LINK-NAME.
|
||
|
||
tz-link.htm mentions the IETF's tzdist working group; Windows
|
||
Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab.
|
||
|
||
Some broken URLs have been fixed in the commentary. (Thanks to
|
||
Lester Caine.)
|
||
|
||
Commentary about Philippines DST has been updated, and commentary
|
||
on pre-1970 time in India has been added.
|
||
|
||
|
||
Release 2014f - 2014-08-05 17:42:36 -0700
|
||
|
||
Changes affecting future timestamps
|
||
|
||
Russia will subtract an hour from most of its time zones on 2014-10-26
|
||
at 02:00 local time. (Thanks to Alexander Krivenyshev.)
|
||
There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky
|
||
Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug
|
||
(Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast
|
||
(Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic
|
||
(Europe/Samara) are not changing their clocks. The changed zones are
|
||
Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd,
|
||
Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk,
|
||
Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga,
|
||
Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours
|
||
subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected,
|
||
but not its UTC offset. Two zones are added: Asia/Chita (split
|
||
from Asia/Yakutsk, and also with two hours subtracted) and
|
||
Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour
|
||
subtracted). (Thanks to Tim Parenti for much of the above.)
|
||
|
||
Changes affecting time zone abbreviations
|
||
|
||
Australian eastern time zone abbreviations are now AEST/AEDT not EST,
|
||
and similarly for the other Australian zones. That is, for eastern
|
||
standard and daylight saving time the abbreviations are AEST and AEDT
|
||
instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
|
||
and AWST/AWDT are now used instead of the former CST, CWST, and WST.
|
||
This change does not affect UT offsets, only time zone abbreviations.
|
||
(Thanks to Rich Tibbett and many others.)
|
||
|
||
Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07)
|
||
effective 2014-10-26 at 02:00 local time.
|
||
|
||
The time zone abbreviation for Xinjiang Time (observed in Ürümqi)
|
||
has been changed from URUT to XJT. (Thanks to Luther Ma.)
|
||
|
||
Prefer MSK/MSD for Moscow time in Russia, even in other cities.
|
||
Similarly, prefer EET/EEST for eastern European time in Russia.
|
||
|
||
Change time zone abbreviations in (western) Samoa to use "ST" and
|
||
"DT" suffixes, as this is more likely to match common practice.
|
||
Prefix "W" to (western) Samoa time when its standard-time offset
|
||
disagrees with that of American Samoa.
|
||
|
||
America/Metlakatla now uses PST, not MeST, to abbreviate its time zone.
|
||
|
||
Time zone abbreviations have been updated for Japan's two time
|
||
zones used 1896-1937. JWST now stands for Western Standard
|
||
Time, and JCST for Central Standard Time (formerly this was CJT).
|
||
These abbreviations are now used for time in Korea, Taiwan,
|
||
and Sakhalin while controlled by Japan.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
China's five zones have been simplified to two, since the post-1970
|
||
differences in the other three seem to have been imaginary. The
|
||
zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been
|
||
removed; backwards-compatibility links still work, albeit with
|
||
different behaviors for timestamps before May 1980. Asia/Urumqi's
|
||
1980 transition to UT +08 has been removed, so that it is now at
|
||
+06 and not +08. (Thanks to Luther Ma and to Alois Treindl;
|
||
Treindl sent helpful translations of two papers by Guo Qingsheng.)
|
||
|
||
Some zones have been turned into links, when they differed from existing
|
||
zones only for older UT offsets where data entries were likely invented.
|
||
These changes affect UT offsets in pre-1970 timestamps only. This is
|
||
similar to the change in release 2013e, except this time for western
|
||
Africa. The affected zones are: Africa/Bamako, Africa/Banjul,
|
||
Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,
|
||
Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and
|
||
Atlantic/St_Helena. This also affects the backwards-compatibility
|
||
link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne,
|
||
Tim Parenti, and David Patte for reporting problems in earlier
|
||
versions of this change.)
|
||
|
||
Asia/Shanghai's pre-standard-time UT offset has been changed from
|
||
8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its
|
||
transition to standard time has been changed from 1928 to 1901.
|
||
|
||
Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01,
|
||
then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945.
|
||
In 1946 it observed DST from 05-15 through 09-30; in 1947
|
||
from 04-15 through 10-31; and in 1979 from 07-01 through 09-30.
|
||
(Thanks to Yu-Cheng Chuang.)
|
||
|
||
Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950.
|
||
|
||
Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not
|
||
10-03 at 00:00. (Thanks to Konstantin Hyppönen.)
|
||
|
||
Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the
|
||
period from 1911 to 1950.
|
||
|
||
Pacific/Chatham has been changed to New Zealand standard time plus
|
||
45 minutes for the period before 1957, reflecting a 1956 remark in
|
||
the New Zealand parliament.
|
||
|
||
Europe/Budapest has several pre-1946 corrections: in 1918 the transition
|
||
out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in
|
||
1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08
|
||
not 04-06 at 02:00; and there was no DST in 1920.
|
||
|
||
Africa/Accra is now assumed to have observed DST from 1920 through 1935.
|
||
|
||
Time in Russia before 1927 or so has been corrected by a few seconds in
|
||
the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi,
|
||
Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and
|
||
Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0
|
||
point. (Thanks to Vladimir Karpinsky for the Moscow changes.)
|
||
|
||
Changes affecting data format
|
||
|
||
A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data.
|
||
The new file's extended format allows multiple country codes per zone.
|
||
The older file is still installed but is deprecated; its format is
|
||
not changing and it will still be distributed for a while, but new
|
||
applications should use the new file.
|
||
|
||
The new file format simplifies maintenance of obscure locations.
|
||
To test this, it adds coverage for the Crozet Islands and the
|
||
Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.)
|
||
|
||
The file 'iso3166.tab' is planned to switch from ASCII to UTF-8.
|
||
It is still ASCII now, but commentary about the switch has been added.
|
||
The new file 'zone1970.tab' already uses UTF-8.
|
||
|
||
Changes affecting code
|
||
|
||
'localtime', 'mktime', etc. now use much less stack space if ALL_STATE
|
||
is defined. (Thanks to Elliott Hughes for reporting the problem.)
|
||
|
||
'zic' no longer mishandles input when ignoring case in locales that
|
||
are not compatible with English, e.g., unibyte Turkish locales when
|
||
compiled with HAVE_GETTEXT.
|
||
|
||
Error diagnostics of 'zic' and 'yearistype' have been reworded so that
|
||
they no longer use ASCII '-' as if it were a dash.
|
||
|
||
'zic' now rejects output file names that contain '.' or '..' components.
|
||
(Thanks to Tim Parenti for reporting the problem.)
|
||
|
||
'zic -v' now warns about output file names that do not follow
|
||
POSIX rules, or that contain a digit or '.'. (Thanks to Arthur
|
||
David Olson for starting the ball rolling on this.)
|
||
|
||
Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0.
|
||
|
||
Changes affecting build procedure
|
||
|
||
'zic' no longer links in localtime.o and asctime.o, as they're not needed.
|
||
(Thanks to John Cochran.)
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
The 'Theory' file documents legacy names, the longstanding
|
||
exceptions to the POSIX-inspired file name rules.
|
||
|
||
The 'zic' documentation clarifies the role of time types when
|
||
interpreting dates. (Thanks to Arthur David Olson.)
|
||
|
||
Documentation and commentary now prefer UTF-8 to US-ASCII,
|
||
allowing the use of proper accents in foreign words and names.
|
||
Code and data have not changed because of this. (Thanks to
|
||
Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug
|
||
this.)
|
||
|
||
Non-HTML documentation and commentary now use plain-text URLs instead of
|
||
HTML insertions, and are more consistent about bracketing URLs when they
|
||
are not already surrounded by white space. (Thanks to suggestions by
|
||
Steffen Nurpmeso.)
|
||
|
||
There is new commentary about Xujiahui Observatory, the five time-zone
|
||
project in China from 1918 to 1949, timekeeping in Japanese-occupied
|
||
Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the
|
||
warlord Jin Shuren in the data.
|
||
|
||
Commentary about the coverage of each Russian zone has been standardized.
|
||
(Thanks to Tim Parenti.)
|
||
|
||
There is new commentary about contemporary timekeeping in Ethiopia.
|
||
|
||
Obsolete comments about a 2007 proposal for DST in Kuwait has been removed.
|
||
|
||
There is new commentary about time in Poland in 1919.
|
||
|
||
Proper credit has been given to DST inventor George Vernon Hudson.
|
||
|
||
Commentary about time in Metlakatla, AK and Resolute, NU has been
|
||
improved, with a new source for the former.
|
||
|
||
In zone.tab, Pacific/Easter no longer mentions Salas y Gómez, as it
|
||
is uninhabited.
|
||
|
||
Commentary about permanent Antarctic bases has been updated.
|
||
|
||
Several typos have been corrected. (Thanks to Tim Parenti for
|
||
contributing some of these fixes.)
|
||
|
||
tz-link.htm now mentions the JavaScript libraries Moment Timezone,
|
||
TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up
|
||
from Matt Johnson.) Also, it mentions the Go 'latlong' package.
|
||
(Thanks to a heads-up from Dirkjan Ochtman.)
|
||
|
||
The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998
|
||
have been removed. These obsolescent US Naval Observatory entries were no
|
||
longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.)
|
||
|
||
|
||
Release 2014e - 2014-06-12 21:53:52 -0700
|
||
|
||
Changes affecting near-future timestamps
|
||
|
||
Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
|
||
(Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily
|
||
switch to standard time at 24:00 the last Thursday before Ramadan, and
|
||
back to DST at 00:00 the first Friday after Ramadan.
|
||
|
||
Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks
|
||
to Milamber Space Network.) Guess that from 2015 on Morocco will
|
||
temporarily switch to standard time at 03:00 the last Saturday before
|
||
Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
|
||
|
||
Changes affecting past timestamps
|
||
|
||
The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of
|
||
"MSD" for Moscow's double daylight time in summer 1921. Also, a typo
|
||
"VLASST" has been repaired to be "VLAST" for Vladivostok summer time
|
||
in 1991. (Thanks to Hank W. for reporting the problems.)
|
||
|
||
Changes affecting commentary
|
||
|
||
tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the
|
||
draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and
|
||
removes stale pointers to World Time Explorer and WORLDTIME.
|
||
|
||
|
||
Release 2014d - 2014-05-27 21:34:40 -0700
|
||
|
||
Changes affecting code
|
||
|
||
zic no longer generates files containing timestamps before the Big Bang.
|
||
This works around GNOME glib bug 878
|
||
<https://gitlab.gnome.org/GNOME/glib/issues/878>
|
||
(Thanks to Leonardo Chiquitto for reporting the bug, and to
|
||
Arthur David Olson and James Cloos for suggesting improvements to the fix.)
|
||
|
||
Changes affecting documentation
|
||
|
||
tz-link.htm now mentions GNOME.
|
||
|
||
|
||
Release 2014c - 2014-05-13 07:44:13 -0700
|
||
|
||
Changes affecting near-future timestamps
|
||
|
||
Egypt observes DST starting 2014-05-15 at 24:00.
|
||
(Thanks to Ahmad El-Dardiry and Gunther Vermier.)
|
||
Details have not been announced, except that DST will not be observed
|
||
during Ramadan. Guess that DST will stop during the same Ramadan dates as
|
||
Morocco, and that Egypt's future spring and fall transitions will be the
|
||
same as 2010 when it last observed DST, namely April's last Friday at
|
||
00:00 to September's last Thursday at 23:00 standard time. Also, guess
|
||
that Ramadan transitions will be at 00:00 standard time.
|
||
|
||
Changes affecting code
|
||
|
||
zic now generates transitions for minimum time values, eliminating guesswork
|
||
when handling low-valued timestamps. (Thanks to Arthur David Olson.)
|
||
|
||
Port to Cygwin sans glibc. (Thanks to Arthur David Olson.)
|
||
|
||
Changes affecting commentary and documentation
|
||
|
||
Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.)
|
||
|
||
|
||
Release 2014b - 2014-03-24 21:28:50 -0700
|
||
|
||
Changes affecting near-future timestamps
|
||
|
||
Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
|
||
(Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU.
|
||
|
||
New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and
|
||
Bengt-Inge Larsson.) This is currently an approximation; a better version
|
||
will require the zic and localtime fixes mentioned below, and the plan is
|
||
to wait for a while until at least the zic fixes propagate.
|
||
|
||
Changes affecting code
|
||
|
||
'zic' and 'localtime' no longer reject locations needing four transitions
|
||
per year for the foreseeable future. (Thanks to Andrew Main (Zefram).)
|
||
Also, 'zic' avoids some unlikely failures due to integer overflow.
|
||
|
||
Changes affecting build procedure
|
||
|
||
'make check' now detects Rule lines defined but never used.
|
||
The NZAQ rules, an instance of this problem, have been removed.
|
||
|
||
Changes affecting commentary and documentation
|
||
|
||
Fix Tuesday/Thursday typo in description of time in Israel.
|
||
(Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
|
||
|
||
Microsoft Windows 8.1 doesn't support tz database names. (Thanks
|
||
to Donald MacQueen.) Instead, the Microsoft Windows Store app
|
||
library supports them.
|
||
|
||
Add comments about Johnston Island time in the 1960s.
|
||
(Thanks to Lyle McElhaney.)
|
||
|
||
Morocco's 2014 DST start will be as predicted.
|
||
(Thanks to Sebastien Willemijns.)
|
||
|
||
|
||
Release 2014a - 2014-03-07 23:30:29 -0800
|
||
|
||
Changes affecting near-future timestamps
|
||
|
||
Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for
|
||
the heads-up, and to Tim Parenti for simplifying the update.)
|
||
|
||
Changes affecting past timestamps
|
||
|
||
Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
Ukraine switched from Moscow to Eastern European time on 1990-07-01
|
||
(not 1992-01-01), and observed DST during the entire next winter.
|
||
(Thanks to Vladimir in Moscow via Alois Treindl.)
|
||
|
||
In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
|
||
(Thanks to Avigdor Finkelstein.)
|
||
|
||
Changes affecting code
|
||
|
||
A uninitialized-storage bug in 'localtime' has been fixed.
|
||
(Thanks to Logan Chien.)
|
||
|
||
Changes affecting the build procedure
|
||
|
||
The settings for 'make check_web' now default to Ubuntu 13.10.
|
||
|
||
Changes affecting commentary and documentation
|
||
|
||
The boundary of the US Pacific time zone is given more accurately.
|
||
(Thanks to Alan Mintz.)
|
||
|
||
Chile's 2014 DST will be as predicted. (Thanks to José Miguel Garrido.)
|
||
|
||
Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Raúl Perasso.)
|
||
|
||
Better descriptions of countries with same time zone history as
|
||
Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.)
|
||
|
||
Several changes affect tz-link.htm, the main web page.
|
||
|
||
Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
|
||
David Braverman).
|
||
|
||
Mention xCal (Internet RFC 6321) and jCal.
|
||
|
||
Microsoft has some support for tz database names.
|
||
|
||
CLDR data formats include both XML and JSON.
|
||
|
||
Mention Maggiolo's map of solar vs standard time.
|
||
(Thanks to Arthur David Olson.)
|
||
|
||
Mention TZ4Net. (Thanks to Matt Johnson.)
|
||
|
||
Mention the timezone-olson Haskell package.
|
||
|
||
Mention zeitverschiebung.net. (Thanks to Martin Jäger.)
|
||
|
||
Remove moribund links to daylight-savings-time.info and to
|
||
Simple Timer + Clocks.
|
||
|
||
Update two links. (Thanks to Oscar van Vlijmen.)
|
||
|
||
Fix some formatting glitches, e.g., remove random newlines from
|
||
abbr elements' title attributes.
|
||
|
||
|
||
Release 2013i - 2013-12-17 07:25:23 -0800
|
||
|
||
Changes affecting near-future timestamps:
|
||
|
||
Jordan switches back to standard time at 00:00 on December 20, 2013.
|
||
The 2006-2011 transition schedule is planned to resume in 2014.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
Changes affecting past timestamps:
|
||
|
||
In 2004, Cuba began DST on March 28, not April 4.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
Changes affecting code
|
||
|
||
The compile-time flag NOSOLAR has been removed, as nowadays the
|
||
benefit of slightly shrinking runtime table size is outweighed by the
|
||
cost of disallowing potential future updates that exceed old limits.
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
The files solar87, solar88, and solar89 are no longer distributed.
|
||
They were a negative experiment - that is, a demonstration that
|
||
tz data can represent solar time only with some difficulty and error.
|
||
Their presence in the distribution caused confusion, as Riyadh
|
||
civil time was generally not solar time in those years.
|
||
|
||
tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.)
|
||
|
||
|
||
Release 2013h - 2013-10-25 15:32:32 -0700
|
||
|
||
Changes affecting current and future timestamps:
|
||
|
||
Libya has switched its UT offset back to +02 without DST, instead
|
||
of +01 with DST. (Thanks to Even Scharning.)
|
||
|
||
Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
|
||
(Thanks to Gwillim Law.)
|
||
|
||
Changes affecting future timestamps:
|
||
|
||
Acre and (we guess) western Amazonas will switch from UT -04 to -05
|
||
on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
Add entries for DST transitions in Morocco in the year 2038.
|
||
This avoids some year-2038 glitches introduced in 2013g.
|
||
(Thanks to Yoshito Umaoka for reporting the problem.)
|
||
|
||
Changes affecting API
|
||
|
||
The 'tzselect' command no longer requires the 'select' command,
|
||
and should now work with /bin/sh on more platforms. It also works
|
||
around a bug in BusyBox awk before version 1.21.0. (Thanks to
|
||
Patrick 'P. J.' McDermott and Alan Barrett.)
|
||
|
||
Changes affecting code
|
||
|
||
Fix localtime overflow bugs with 32-bit unsigned time_t.
|
||
|
||
zdump no longer assumes sscanf returns maximal values on overflow.
|
||
|
||
Changes affecting the build procedure
|
||
|
||
The builder can specify which programs to use, if any, instead of
|
||
'ar' and 'ranlib', and libtz.a is now built locally before being
|
||
installed. (Thanks to Michael Forney.)
|
||
|
||
A dependency typo in the 'zdump' rule has been fixed.
|
||
(Thanks to Andrew Paprocki.)
|
||
|
||
The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
|
||
work as specified by POSIX.2-1992 or later; this is portable nowadays.
|
||
|
||
'make clean' no longer removes 'leapseconds', since it's
|
||
host-independent and is part of the distribution.
|
||
|
||
The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol
|
||
(thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
|
||
|
||
Update URLs in tz-link page. Add URLs for Microsoft Windows, since
|
||
8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no
|
||
longer maintained) and for old advisories. SOFA now does C.
|
||
|
||
Release 2013g - 2013-09-30 21:08:26 -0700
|
||
|
||
Changes affecting current and near-future timestamps
|
||
|
||
Morocco now observes DST from the last Sunday in March to the last
|
||
Sunday in October, not April to September respectively. (Thanks
|
||
to Steffen Thorsen.)
|
||
|
||
Changes affecting 'zic'
|
||
|
||
'zic' now runs on platforms that lack both hard links and symlinks.
|
||
(Thanks to Theo Veenker for reporting the problem, for MinGW.)
|
||
Also, fix some bugs on platforms that lack hard links but have symlinks.
|
||
|
||
'zic -v' again warns that Asia/Tehran has no POSIX environment variable
|
||
to predict the far future, fixing a bug introduced in 2013e.
|
||
|
||
Changes affecting the build procedure
|
||
|
||
The 'leapseconds' file is again put into the tzdata tarball.
|
||
Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to
|
||
Matt Burgess and Ian Abbott.) The timestamps of these and other
|
||
dependent files in tarballs are adjusted more consistently.
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
The README file is now part of the data tarball as well as the code.
|
||
It now states that files are public domain unless otherwise specified.
|
||
(Thanks to Andrew Main (Zefram) for asking for clarifications.)
|
||
Its details about the 1989 release moved to a place of honor near
|
||
the end of NEWS.
|
||
|
||
|
||
Release 2013f - 2013-09-24 23:37:36 -0700
|
||
|
||
Changes affecting near-future timestamps
|
||
|
||
Tocantins will very likely not observe DST starting this spring.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
Jordan will likely stay at UT +03 indefinitely, and will not fall
|
||
back this fall.
|
||
|
||
Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.)
|
||
|
||
Changes affecting API
|
||
|
||
The types of the global variables 'timezone' and 'altzone' (if present)
|
||
have been changed back to 'long'. This is required for 'timezone'
|
||
by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
|
||
These variables were originally 'long' in the tz code, but were
|
||
mistakenly changed to 'time_t' in 1987; nobody reported the
|
||
incompatibility until now. The difference matters on x32, where
|
||
'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)
|
||
|
||
Changes affecting the build procedure
|
||
|
||
Avoid long strings in leapseconds.awk to work around a mawk bug.
|
||
(Thanks to Cyril Baurand.)
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
New file 'NEWS' that contains release notes like this one.
|
||
|
||
Paraguay's law does not specify DST transition time; 00:00 is customary.
|
||
(Thanks to Waldemar Villamayor-Venialbo.)
|
||
|
||
Minor capitalization fixes.
|
||
|
||
Changes affecting version-control only
|
||
|
||
The experimental GitHub repository now contains annotated and
|
||
signed tags for recent releases, e.g., '2013e' for Release 2013e.
|
||
Releases are tagged starting with 2012e; earlier releases were
|
||
done differently, and tags would either not have a simple name or
|
||
not exactly match what was released.
|
||
|
||
'make set-timestamps' is now simpler and a bit more portable.
|
||
|
||
|
||
Release 2013e - 2013-09-19 23:50:04 -0700
|
||
|
||
Changes affecting near-future timestamps
|
||
|
||
This year Fiji will start DST on October 27, not October 20.
|
||
(Thanks to David Wheeler for the heads-up.) For now, guess that
|
||
Fiji will continue to spring forward the Sunday before the fourth
|
||
Monday in October.
|
||
|
||
Changes affecting current and future time zone abbreviations
|
||
|
||
Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
|
||
time zone abbreviations since 1932. (Thanks to George Ziegler,
|
||
Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
|
||
Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
|
||
Asia/Makassar, and Asia/Pontianak.
|
||
|
||
Use ART (UT -03, standard time), rather than WARST (also -03, but
|
||
daylight saving time) for San Luis, Argentina since 2009.
|
||
|
||
Changes affecting Godthåb timestamps after 2037 if version mismatch
|
||
|
||
Allow POSIX-like TZ strings where the transition time's hour can
|
||
range from -167 through 167, instead of the POSIX-required 0
|
||
through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
|
||
new Fiji rules. This is a more-compact way to represent
|
||
far-future timestamps for America/Godthab, America/Santiago,
|
||
Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
|
||
Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by
|
||
this change. (Derived from a suggestion by Arthur David Olson.)
|
||
|
||
Allow POSIX-like TZ strings where daylight saving time is in
|
||
effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western
|
||
Argentina Summer Time all year. This supports a more-compact way
|
||
to represent the 2013d data for America/Argentina/San_Luis.
|
||
Because of the change for San Luis noted above this change does not
|
||
affect the current data. (Thanks to Andrew Main (Zefram) for
|
||
suggestions that improved this change.)
|
||
|
||
Where these two TZ changes take effect, there is a minor extension
|
||
to the tz file format in that it allows new values for the
|
||
embedded TZ-format string, and the tz file format version number
|
||
has therefore been increased from 2 to 3 as a precaution.
|
||
Version-2-based client code should continue to work as before for
|
||
all timestamps before 2038. Existing version-2-based client code
|
||
(tzcode, GNU/Linux, Solaris) has been tested on version-3-format
|
||
files, and typically works in practice even for timestamps after
|
||
2037; the only known exception is America/Godthab.
|
||
|
||
Changes affecting timestamps before 1970
|
||
|
||
Pacific/Johnston is now a link to Pacific/Honolulu. This corrects
|
||
some errors before 1947.
|
||
|
||
Some zones have been turned into links, when they differ from existing
|
||
zones only in older data entries that were likely invented or that
|
||
differ only in LMT or transitions from LMT. These changes affect
|
||
only timestamps before 1943. The affected zones are:
|
||
Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
|
||
America/Grenada, America/Guadeloupe, America/Marigot,
|
||
America/Montserrat, America/St_Barthelemy, America/St_Kitts,
|
||
America/St_Lucia, America/St_Thomas, America/St_Vincent,
|
||
America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for
|
||
confirming that the old Europe/Vaduz zone was wrong and the new
|
||
link is better for WWII-era times.)
|
||
|
||
Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects
|
||
America/Cayman, America/Jamaica and America/Grand_Turk timestamps
|
||
from 1890 to 1912.
|
||
|
||
Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
|
||
This affects Europe/Zurich timestamps from 1853 to 1894. (Thanks
|
||
to Alois Treindl.)
|
||
|
||
Change the date of the circa-1850 Zurich transition from 1849-09-12
|
||
to 1853-07-16, overriding Shanks with data from Messerli about
|
||
postal and telegraph time in Switzerland.
|
||
|
||
Changes affecting time zone abbreviations before 1970
|
||
|
||
For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
|
||
as Jakarta was called Batavia back then.
|
||
|
||
Changes affecting API
|
||
|
||
The 'zic' command now outputs a dummy transition when far-future
|
||
data can't be summarized using a TZ string, and uses a 402-year
|
||
window rather than a 400-year window. For the current data, this
|
||
affects only the Asia/Tehran file. It does not affect any of the
|
||
timestamps that this file represents, so zdump outputs the same
|
||
information as before. (Thanks to Andrew Main (Zefram).)
|
||
|
||
The 'date' command has a new '-r' option, which lets you specify
|
||
the integer time to display, a la FreeBSD.
|
||
|
||
The 'tzselect' command has two new options '-c' and '-n', which lets you
|
||
select a zone based on latitude and longitude.
|
||
|
||
The 'zic' command's '-v' option now warns about constructs that
|
||
require the new version-3 binary file format. (Thanks to Arthur
|
||
David Olson for the suggestion.)
|
||
|
||
Support for floating-point time_t has been removed.
|
||
It was always dicey, and POSIX no longer requires it.
|
||
(Thanks to Eric Blake for suggesting to the POSIX committee to
|
||
remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
|
||
Heninger, Arthur David Olson, and Alois Treindl, for reporting
|
||
bugs and elucidating some of the corners of the old floating-point
|
||
implementation.)
|
||
|
||
The signatures of 'offtime', 'timeoff', and 'gtime' have been
|
||
changed back to the old practice of using 'long' to represent UT
|
||
offsets. This had been inadvertently and mistakenly changed to
|
||
'int_fast32_t'. (Thanks to Christos Zoulas.)
|
||
|
||
The code avoids undefined behavior on integer overflow in some
|
||
more places, including gmtime, localtime, mktime and zdump.
|
||
|
||
Changes affecting the zdump utility
|
||
|
||
zdump now outputs "UT" when referring to Universal Time, not "UTC".
|
||
"UTC" does not make sense for timestamps that predate the introduction
|
||
of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
|
||
for clarifying UT vs UTC.)
|
||
|
||
Data changes affecting behavior of tzselect and similar programs
|
||
|
||
Country code BQ is now called the more-common name "Caribbean Netherlands"
|
||
rather than the more-official "Bonaire, St Eustatius & Saba".
|
||
|
||
Remove from zone.tab the names America/Montreal, America/Shiprock,
|
||
and Antarctica/South_Pole, as they are equivalent to existing
|
||
same-country-code zones for post-1970 timestamps. The data entries for
|
||
these names are unchanged, so the names continue to work as before.
|
||
|
||
Changes affecting code internals
|
||
|
||
zic -c now runs way faster on 64-bit hosts when given large numbers.
|
||
|
||
zic now uses vfprintf to avoid allocating and freeing some memory.
|
||
|
||
tzselect now computes the list of continents from the data,
|
||
rather than have it hard-coded.
|
||
|
||
Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
|
||
|
||
Changes affecting the build procedure
|
||
|
||
The 'leapseconds' file is now generated automatically from a
|
||
new file 'leap-seconds.list', which is a copy of
|
||
<ftp://ftp.nist.gov/pub/time/leap-seconds.list>
|
||
A new source file 'leapseconds.awk' implements this.
|
||
The goal is simplification of the future maintenance of 'leapseconds'.
|
||
|
||
When building the 'posix' or 'right' subdirectories, if the
|
||
subdirectory would be a copy of the default subdirectory, it is
|
||
now made a symbolic link if that is supported. This saves about
|
||
2 MB of file system space.
|
||
|
||
The links America/Shiprock and Antarctica/South_Pole have been
|
||
moved to the 'backward' file. This affects only nondefault builds
|
||
that omit 'backward'.
|
||
|
||
Changes affecting version-control only
|
||
|
||
.gitignore now ignores 'date'.
|
||
|
||
Changes affecting documentation and commentary
|
||
|
||
Changes to the 'tzfile' man page
|
||
|
||
It now mentions that the binary file format may be extended in
|
||
future versions by appending data.
|
||
|
||
It now refers to the 'zdump' and 'zic' man pages.
|
||
|
||
Changes to the 'zic' man page
|
||
|
||
It lists conditions that elicit a warning with '-v'.
|
||
|
||
It says that the behavior is unspecified when duplicate names
|
||
are given, or if the source of one link is the target of another.
|
||
|
||
Its examples are updated to match the latest data.
|
||
|
||
The definition of white space has been clarified slightly.
|
||
(Thanks to Michael Deckers.)
|
||
|
||
Changes to the 'Theory' file
|
||
|
||
There is a new section about the accuracy of the tz database,
|
||
describing the many ways that errors can creep in, and
|
||
explaining why so many of the pre-1970 timestamps are wrong or
|
||
misleading (thanks to Steve Allen, Lester Caine, and Garrett
|
||
Wollman for discussions that contributed to this).
|
||
|
||
The 'Theory' file describes LMT better (this follows a
|
||
suggestion by Guy Harris).
|
||
|
||
It refers to the 2013 edition of POSIX rather than the 2004 edition.
|
||
|
||
It's mentioned that excluding 'backward' should not affect the
|
||
other data, and it suggests at least one zone.tab name per
|
||
inhabited country (thanks to Stephen Colebourne).
|
||
|
||
Some longstanding restrictions on names are documented, e.g.,
|
||
'America/New_York' precludes 'America/New_York/Bronx'.
|
||
|
||
It gives more reasons for the 1970 cutoff.
|
||
|
||
It now mentions which time_t variants are supported, such as
|
||
signed integer time_t. (Thanks to Paul Goyette for reporting
|
||
typos in an experimental version of this change.)
|
||
|
||
(Thanks to Philip Newton for correcting typos in these changes.)
|
||
|
||
Documentation and commentary is more careful to distinguish UT in
|
||
general from UTC in particular. (Thanks to Steve Allen.)
|
||
|
||
Add a better source for the Zurich 1894 transition.
|
||
(Thanks to Pierre-Yves Berger.)
|
||
|
||
Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)
|
||
|
||
|
||
Release 2013d - 2013-07-05 07:38:01 -0700
|
||
|
||
Changes affecting future timestamps:
|
||
|
||
Morocco's midsummer transitions this year are July 7 and August 10,
|
||
not July 9 and August 8. (Thanks to Andrew Paprocki.)
|
||
|
||
Israel now falls back on the last Sunday of October.
|
||
(Thanks to Ephraim Silverberg.)
|
||
|
||
Changes affecting past timestamps:
|
||
|
||
Specify Jerusalem's location more precisely; this changes the pre-1880
|
||
times by 2 s.
|
||
|
||
Changing affecting metadata only:
|
||
|
||
Fix typos in the entries for country codes BQ and SX.
|
||
|
||
Changes affecting code:
|
||
|
||
Rework the code to fix a bug with handling Australia/Macquarie on
|
||
32-bit hosts (thanks to Arthur David Olson).
|
||
|
||
Port to platforms like NetBSD, where time_t can be wider than long.
|
||
|
||
Add support for testing time_t types other than the system's.
|
||
Run 'make check_time_t_alternatives' to try this out.
|
||
Currently, the tests fail for unsigned time_t;
|
||
this should get fixed at some point.
|
||
|
||
Changes affecting documentation and commentary:
|
||
|
||
Deemphasize the significance of national borders.
|
||
|
||
Update the zdump man page.
|
||
|
||
Remove obsolete NOID comment (thanks to Denis Excoffier).
|
||
|
||
Update several URLs and comments in the web pages.
|
||
|
||
Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
|
||
|
||
Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
|
||
|
||
|
||
Release 2013c - 2013-04-19 16:17:40 -0700
|
||
|
||
Changes affecting current and future timestamps:
|
||
|
||
Palestine observed DST starting March 29, 2013. (Thanks to
|
||
Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST,
|
||
with the predicted rules being the last Thursday in March at 24:00
|
||
to the first Friday on or after September 21 at 01:00.
|
||
|
||
Assume that the recent change to Paraguay's DST rules is permanent,
|
||
by moving the end of DST to the 4th Sunday in March every year.
|
||
(Thanks to Carlos Raúl Perasso.)
|
||
|
||
Changes affecting past timestamps:
|
||
|
||
Fix some historical data for Palestine to agree with that of
|
||
timeanddate.com, as follows:
|
||
|
||
The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
|
||
00:00 Apr 1.
|
||
|
||
The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
|
||
02:00.
|
||
|
||
The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
|
||
|
||
The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
|
||
|
||
The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
|
||
|
||
The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
|
||
|
||
Fix times of habitation for Macquarie to agree with the Tasmania
|
||
Parks & Wildlife Service history, which indicates that permanent
|
||
habitation was 1899-1919 and 1948 on.
|
||
|
||
Changing affecting metadata only:
|
||
|
||
Macquarie Island is politically part of Australia, not Antarctica.
|
||
(Thanks to Tobias Conradi.)
|
||
|
||
Sort Macquarie more-consistently with other parts of Australia.
|
||
(Thanks to Tim Parenti.)
|
||
|
||
|
||
Release 2013b - 2013-03-10 22:33:40 -0700
|
||
|
||
Changes affecting current and future timestamps:
|
||
|
||
Haiti uses US daylight-saving rules this year, and presumably future years.
|
||
This changes timestamps starting today. (Thanks to Steffen Thorsen.)
|
||
|
||
Paraguay will end DST on March 24 this year.
|
||
(Thanks to Steffen Thorsen.) For now, assume it's just this year.
|
||
|
||
Morocco does not observe DST during Ramadan;
|
||
try to predict Ramadan in Morocco as best we can.
|
||
(Thanks to Erik Homoet for the heads-up.)
|
||
|
||
Changes affecting commentary:
|
||
|
||
Update URLs in tz-link page. Add URLs for webOS, BB10, iOS.
|
||
Update URL for Solaris. Mention Internet RFC 6557.
|
||
Update Internet RFCs 2445->5545, 2822->5322.
|
||
Switch from FTP to HTTP for Internet RFCs.
|
||
|
||
|
||
Release 2013a - 2013-02-27 09:20:35 -0800
|
||
|
||
Change affecting binary data format:
|
||
|
||
The zone offset at the end of version-2-format zone files is now
|
||
allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.)
|
||
|
||
Changes affecting current and future timestamps:
|
||
|
||
Chile's 2013 rules, and we guess rules for 2014 and later, will be
|
||
the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
|
||
(Thanks to Steffen Thorsen and Robert Elz.)
|
||
|
||
New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
|
||
(Thanks to Tobias Conradi and Arthur David Olson.)
|
||
|
||
Many changes affect historical timestamps before 1940.
|
||
These were deduced from: Milne J. Civil time. Geogr J. 1899
|
||
Feb;13(2):173-94 <https://www.jstor.org/stable/1774359>.
|
||
|
||
Changes affecting the code:
|
||
|
||
Fix zic bug that mishandled Egypt's 2010 changes (this also affected
|
||
the data). (Thanks to Arthur David Olson.)
|
||
|
||
Fix localtime bug when time_t is unsigned and data files were generated
|
||
by a signed time_t system. (Thanks to Doug Bailey for reporting and
|
||
to Arthur David Olson for fixing.)
|
||
|
||
Allow the email address for bug reports to be set by the packager.
|
||
The default is tz@iana.org, as before. (Thanks to Joseph S. Myers.)
|
||
|
||
Update HTML checking to be compatible with Ubuntu 12.10.
|
||
|
||
Check that files are a safe subset of ASCII. At some point we may
|
||
relax this requirement to a safe subset of UTF-8. Without the
|
||
check, some non-UTF-8 encodings were leaking into the distribution.
|
||
|
||
Commentary changes:
|
||
|
||
Restore a comment about copyright notices that was inadvertently deleted.
|
||
(Thanks to Arthur David Olson.)
|
||
|
||
Improve the commentary about which districts observe what times
|
||
in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson.)
|
||
|
||
Add web page links to tz.js.
|
||
|
||
Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.)
|
||
|
||
|
||
Release 2012j - 2012-11-12 18:34:49 -0800
|
||
|
||
Libya moved to CET this weekend, but with DST planned next year.
|
||
(Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
|
||
|
||
Signatures now have the extension .asc, not .sign, as that's more
|
||
standard. (Thanks to Phil Pennock.)
|
||
|
||
The output of 'zdump --version', and of 'zic --version', now
|
||
uses a format that is more typical for --version.
|
||
(Thanks to Joseph S. Myers.)
|
||
|
||
The output of 'tzselect --help', 'zdump --help', and 'zic --help'
|
||
now uses tz@iana.org rather than the old elsie address.
|
||
|
||
zic -v now complains about abbreviations that are less than 3
|
||
or more than 6 characters, as per Posix. Formerly, it checked
|
||
for abbreviations that were more than 3.
|
||
|
||
'make public' no longer puts its temporary directory under /tmp,
|
||
and uses the just-built zic rather than the system zic.
|
||
|
||
Various fixes to documentation and commentary.
|
||
|
||
|
||
Release 2012i - 2012-11-03 12:57:09 -0700
|
||
|
||
Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.)
|
||
|
||
Linker flags can now be specified via LDFLAGS.
|
||
AWK now defaults to 'awk', not 'nawk'.
|
||
The shell in tzselect now defaults to /bin/bash, but this can
|
||
be overridden by specifying KSHELL.
|
||
The main web page now mentions the unofficial GitHub repository.
|
||
(Thanks to Mike Frysinger.)
|
||
|
||
Tarball signatures can now be built by running 'make signatures'.
|
||
There are also new makefile rules 'tarballs', 'check_public', and
|
||
separate makefile rules for each tarball and signature file.
|
||
A few makefile rules are now more portable to strict POSIX.
|
||
|
||
The main web page now lists the canonical IANA URL.
|
||
|
||
|
||
Release 2012h - 2012-10-26 22:49:10 -0700
|
||
|
||
Bahia no longer has DST. (Thanks to Kelley Cook.)
|
||
|
||
Tocantins has DST. (Thanks to Rodrigo Severo.)
|
||
|
||
Israel has new DST rules next year. (Thanks to Ephraim Silverberg.)
|
||
|
||
Jordan stays on DST this winter. (Thanks to Steffen Thorsen.)
|
||
|
||
Web page updates.
|
||
|
||
More C modernization, except that at Arthur David Olson's suggestion
|
||
the instances of 'register' were kept.
|
||
|
||
|
||
Release 2012g - 2012-10-17 20:59:45 -0700
|
||
|
||
Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.)
|
||
|
||
Palestine fall 2012. (Thanks to Steffen Thorsen.)
|
||
|
||
Assume C89.
|
||
|
||
To attack the version-number problem, this release ships the file
|
||
'Makefile' (which contains the release number) in both the tzcode and
|
||
the tzdata tarballs. The two Makefiles are identical, and should be
|
||
identical in any matching pair of tarballs, so it shouldn't matter
|
||
which order you extract the tarballs. Perhaps we can come up with a
|
||
better version-number scheme at some point; this scheme does have the
|
||
virtue of not adding more files.
|
||
|
||
|
||
Release 2012f - 2012-09-12 23:17:03 -0700
|
||
|
||
* australasia (Pacific/Fiji): Fiji DST is October 21 through January
|
||
20 this year. (Thanks to Steffen Thorsen.)
|
||
|
||
|
||
Release 2012e - 2012-08-02 20:44:55 -0700
|
||
|
||
* australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14.
|
||
(Thanks to Steffen Thorsen.)
|
||
|
||
* Use a single version number for both code and data.
|
||
|
||
* .gitignore: New file.
|
||
|
||
* Remove trailing white space.
|
||
|
||
|
||
Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
|
||
|
||
Changes for Morocco's timestamps, which take effect in a couple of
|
||
hours, along with infrastructure changes to accommodate how the tz
|
||
code and data are released on IANA.
|
||
|
||
|
||
Release data2012c - 2012-03-27 12:17:25 -0400
|
||
|
||
africa
|
||
Summer time changes for Morocco (to start late April 2012)
|
||
|
||
asia
|
||
Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
|
||
|
||
northamerica
|
||
Haiti following US/Canada rules for 2012 (and we're assuming,
|
||
for now anyway, for the future).
|
||
|
||
|
||
Release 2012b - 2012-03-02 12:29:15 +0700
|
||
|
||
There is just one change to tzcode2012b (compared with 2012a):
|
||
the Makefile that was accidentally included with 2012a has been
|
||
replaced with the version that should have been there, which is
|
||
identical with the previous version (from tzcode2011i).
|
||
|
||
There are just two changes in tzdata2012b compared with 2012a.
|
||
|
||
Most significantly, summer time in Cuba has been delayed 3 weeks
|
||
(now starts April 1 rather than March 11). Since Mar 11 (the old start
|
||
date, as listed in 2012a) is just a little over a week away, this
|
||
change is urgent.
|
||
|
||
Less importantly, an excess tab in one of the changes in zone.tab
|
||
in 2012a has been removed.
|
||
|
||
|
||
Release 2012a - 2012-03-01 18:28:10 +0700
|
||
|
||
The changes in tzcode2012a (compared to the previous version, 2011i)
|
||
are entirely to the README and tz-art.htm and tz-link.htm files, if
|
||
none of those concern you, you can ignore the code update. The changes
|
||
reflect the changed addresses for the mailing list and the code and
|
||
data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
|
||
has been added to tz-link.htm).
|
||
|
||
In tzdata2012a (compared to the previous release, which was 2011n)
|
||
the major changes are:
|
||
Chile 2011/2012 and 2012/2013 summer time date adjustments.
|
||
Falkland Islands onto permanent summer time (we're assuming for the
|
||
foreseeable future, though 2012 is all we're fairly certain of.)
|
||
Armenia has abolished Summer Time.
|
||
Tokelau jumped the International Date Line back last December
|
||
(just the same as their near neighbour, Samoa).
|
||
America/Creston is a new zone for a small area of British Columbia
|
||
There will be a leapsecond 2012-06-30 23:59:60 UTC.
|
||
|
||
Other minor changes are:
|
||
Corrections to 1918 Canadian summer time end dates.
|
||
Updated URL for UK time zone history (in comments)
|
||
A few typos in Le Corre's list of free French place names (comments)
|
||
|
||
|
||
Release data2011n - 2011-10-30 14:57:54 +0700
|
||
|
||
There are three changes of note - most urgently, Cuba (America/Havana)
|
||
has extended summer time by two weeks, now to end on Nov 13, rather than
|
||
the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic
|
||
(Europe/Tiraspol) decided not to split from the rest of Moldova after
|
||
all, and consequently that zone has been removed (again) and reinstated
|
||
in the "backward" file as a link to Europe/Chisinau. And third, the
|
||
end date for Fiji's summer time this summer was moved forward from the
|
||
earlier planned Feb 26, to Jan 22.
|
||
|
||
Apart from that, Moldova (MD) returns to a single entry in zone.tab
|
||
(and the incorrect syntax that was in the 2011m version of that file
|
||
is so fixed - it would have been fixed in a different way had this
|
||
change not happened - that's the "missing" sccs version id).
|
||
|
||
|
||
Release data2011m - 2011-10-24 21:42:16 +0700
|
||
|
||
In particular, the typos in comments in the data (2011-11-17 should have
|
||
been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
|
||
Tim Parenti noted) have been fixed, and the change for Ukraine has been
|
||
made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
|
||
Tim Parenti, and also Denys Gavrysh)
|
||
|
||
In addition, I added Europe/Tiraspol to zone.tab.
|
||
|
||
This time, all the files have new version numbers... (including the files
|
||
otherwise unchanged in 2011m that were changed in 2011l but didn't get new
|
||
version numbers there...)
|
||
|
||
|
||
Release data2011l - 2011-10-10 11:15:43 +0700
|
||
|
||
There are just 2 changes that cause different generated tzdata files from
|
||
zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
|
||
is included, but commented out. Compared with the diff I sent out last week,
|
||
this version also includes attributions for the sources for the changes
|
||
(in much the same format as ado used, but the html tags have not been
|
||
checked, verified, or used in any way at all, so if there are errors there,
|
||
please let me know.)
|
||
|
||
|
||
Release data2011k - 2011-09-20 17:54:03 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2011j - 2011-09-12 09:22:49 -0400
|
||
|
||
(contemporary changes for Samoa; past changes for Kenya, Uganda, and
|
||
Tanzania); there are also two spelling corrections to comments in
|
||
the australasia file (with thanks to Christos Zoulas).
|
||
|
||
|
||
Release 2011i - 2011-08-29 05:56:32 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2011h - 2011-06-15 18:41:48 -0400
|
||
|
||
Russia and Curaçao changes
|
||
|
||
|
||
Release 2011g - 2011-04-25 09:07:22 -0400
|
||
|
||
update the rules for Egypt to reflect its abandonment of DST this year
|
||
|
||
|
||
Release 2011f - 2011-04-06 17:14:53 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2011e - 2011-03-31 16:04:38 -0400
|
||
|
||
Morocco, Chile, and tz-link changes
|
||
|
||
|
||
Release 2011d - 2011-03-14 09:18:01 -0400
|
||
|
||
changes that impact present-day timestamps in Cuba, Samoa, and Turkey
|
||
|
||
|
||
Release 2011c - 2011-03-07 09:30:09 -0500
|
||
|
||
These do affect current timestamps in Chile and Annette Island, Canada.
|
||
|
||
|
||
Release 2011b - 2011-02-07 08:44:50 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2011a - 2011-01-24 10:30:16 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2010o - 2010-11-01 09:18:23 -0400
|
||
|
||
change to the end of DST in Fiji in 2011
|
||
|
||
|
||
Release 2010n - 2010-10-25 08:19:17 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2010m - 2010-09-27 09:24:48 -0400
|
||
|
||
Hong Kong, Vostok, and zic.c changes
|
||
|
||
|
||
Release 2010l - 2010-08-16 06:57:25 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2010k - 2010-07-26 10:42:27 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2010j - 2010-05-10 09:07:48 -0400
|
||
|
||
changes for Bahía de Banderas and for version naming
|
||
|
||
|
||
Release data2010i - 2010-04-16 18:50:45 -0400
|
||
|
||
the end of DST in Morocco on 2010-08-08
|
||
|
||
|
||
Release data2010h - 2010-04-05 09:58:56 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2010g - 2010-03-24 11:14:53 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2010f - 2010-03-22 09:45:46 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2010e - 2010-03-08 14:24:27 -0500
|
||
|
||
corrects the Dhaka bug found by Danvin Ruangchan
|
||
|
||
|
||
Release data2010d - 2010-03-06 07:26:01 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2010c - 2010-03-01 09:20:58 -0500
|
||
|
||
changes including KRE's suggestion for earlier initialization of
|
||
"goahead" and "goback" structure elements
|
||
|
||
|
||
Release code2010a - 2010-02-16 10:40:04 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2010b - 2010-01-20 12:37:01 -0500
|
||
|
||
Mexico changes
|
||
|
||
|
||
Release data2010a - 2010-01-18 08:30:04 -0500
|
||
|
||
changes to Dhaka
|
||
|
||
|
||
Release data2009u - 2009-12-26 08:32:28 -0500
|
||
|
||
changes to DST in Bangladesh
|
||
|
||
|
||
Release 2009t - 2009-12-21 13:24:27 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2009s - 2009-11-14 10:26:32 -0500
|
||
|
||
(cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
|
||
|
||
|
||
Release 2009r - 2009-11-09 10:10:31 -0500
|
||
|
||
"antarctica" and "tz-link.htm" changes
|
||
|
||
|
||
Release 2009q - 2009-11-02 09:12:40 -0500
|
||
|
||
with two corrections as reported by Eric Muller and Philip Newton
|
||
|
||
|
||
Release data2009p - 2009-10-23 15:05:27 -0400
|
||
|
||
Argentina (including San Luis) changes (with the correction from
|
||
Mariano Absatz)
|
||
|
||
|
||
Release data2009o - 2009-10-14 16:49:38 -0400
|
||
|
||
Samoa (commentary only), Pakistan, and Bangladesh changes
|
||
|
||
|
||
Release data2009n - 2009-09-22 15:13:38 -0400
|
||
|
||
added commentary for Argentina and a change to the end of DST in
|
||
2009 in Pakistan
|
||
|
||
|
||
Release data2009m - 2009-09-03 10:23:43 -0400
|
||
|
||
Samoa and Palestine changes
|
||
|
||
|
||
Release data2009l - 2009-08-14 09:13:07 -0400
|
||
|
||
Samoa (comments only) and Egypt
|
||
|
||
|
||
Release 2009k - 2009-07-20 09:46:08 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2009j - 2009-06-15 06:43:59 -0400
|
||
|
||
Bangladesh change (with a short turnaround since the DST change is
|
||
impending)
|
||
|
||
|
||
Release 2009i - 2009-06-08 09:21:22 -0400
|
||
|
||
updating for DST in Bangladesh this year
|
||
|
||
|
||
Release 2009h - 2009-05-26 09:19:14 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2009g - 2009-04-20 16:34:07 -0400
|
||
|
||
Cairo
|
||
|
||
|
||
Release data2009f - 2009-04-10 11:00:52 -0400
|
||
|
||
correct DST in Pakistan
|
||
|
||
|
||
Release 2009e - 2009-04-06 09:08:11 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2009d - 2009-03-23 09:38:12 -0400
|
||
|
||
Morocco, Tunisia, Argentina, and American Astronomical Society changes
|
||
|
||
|
||
Release data2009c - 2009-03-16 09:47:51 -0400
|
||
|
||
change to the start of Cuban DST
|
||
|
||
|
||
Release 2009b - 2009-02-09 11:15:22 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2009a - 2009-01-21 10:09:39 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data2008i - 2008-10-21 12:10:25 -0400
|
||
|
||
southamerica and zone.tab files, with Argentina DST rule changes and
|
||
United States zone reordering and recommenting
|
||
|
||
|
||
Release 2008h - 2008-10-13 07:33:56 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2008g - 2008-10-06 09:03:18 -0400
|
||
|
||
Fix a broken HTML anchor and update Brazil's DST transitions;
|
||
there's also a slight reordering of information in tz-art.htm.
|
||
|
||
|
||
Release data2008f - 2008-09-09 22:33:26 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2008e - 2008-07-28 14:11:17 -0400
|
||
|
||
changes by Arthur David Olson and Jesper Nørgaard Welen
|
||
|
||
|
||
Release data2008d - 2008-07-07 09:51:38 -0400
|
||
|
||
changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
|
||
|
||
|
||
Release data2008c - 2008-05-19 17:48:03 -0400
|
||
|
||
Pakistan, Morocco, and Mongolia
|
||
|
||
|
||
Release data2008b - 2008-03-24 08:30:59 -0400
|
||
|
||
including renaming Asia/Calcutta to Asia/Kolkata, with a backward
|
||
link provided
|
||
|
||
|
||
Release 2008a - 2008-03-08 05:42:16 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 2007k - 2007-12-31 10:25:22 -0500
|
||
|
||
most importantly, changes to the "southamerica" file based on
|
||
Argentina's readoption of daylight saving time
|
||
|
||
|
||
Release 2007j - 2007-12-03 09:51:01 -0500
|
||
|
||
1. eliminate the "P" (parameter) macro;
|
||
|
||
2. the "noncontroversial" changes circulated on the time zone
|
||
mailing list (less the changes to "logwtmp.c");
|
||
|
||
3. eliminate "too many transition" errors when "min" is used in time
|
||
zone rules;
|
||
|
||
4. changes by Paul Eggert (including updated information for Venezuela).
|
||
|
||
|
||
Release data2007i - 2007-10-30 10:28:11 -0400
|
||
|
||
changes for Cuba and Syria
|
||
|
||
|
||
Release 2007h - 2007-10-01 10:05:51 -0400
|
||
|
||
changes by Paul Eggert, as well as an updated link to the ICU
|
||
project in tz-link.htm
|
||
|
||
|
||
Release 2007g - 2007-08-20 10:47:59 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
The "leapseconds" file has been updated to incorporate the most
|
||
recent International Earth Rotation and Reference Systems Service
|
||
(IERS) bulletin.
|
||
|
||
There's an addition to tz-art.htm regarding the television show "Medium".
|
||
|
||
|
||
Release 2007f - 2007-05-07 10:46:46 -0400
|
||
|
||
changes by Paul Eggert (including Haiti, Turks and Caicos, and New
|
||
Zealand)
|
||
|
||
changes to zic.c to allow hour values greater than 24 (along with
|
||
Paul's improved time value overflow checking)
|
||
|
||
|
||
Release 2007e - 2007-04-02 10:11:52 -0400
|
||
|
||
Syria and Honduras changes by Paul Eggert
|
||
|
||
zic.c variable renaming changes by Arthur David Olson
|
||
|
||
|
||
Release 2007d - 2007-03-20 08:48:30 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
the elimination of white space at the ends of lines
|
||
|
||
|
||
Release 2007c - 2007-02-26 09:09:37 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2007b - 2007-02-12 09:34:20 -0500
|
||
|
||
Paul Eggert's proposed change to the quotation handling logic in zic.c.
|
||
|
||
changes to the commentary in "leapseconds" reflecting the IERS
|
||
announcement that there is to be no positive leap second at the end
|
||
of June 2007.
|
||
|
||
|
||
Release 2007a - 2007-01-08 12:28:29 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
Derick Rethan's Asmara change
|
||
|
||
Oscar van Vlijmen's Easter Island local mean time change
|
||
|
||
symbolic link changes
|
||
|
||
|
||
Release 2006p - 2006-11-27 08:54:27 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2006o - 2006-11-06 09:18:07 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2006n - 2006-10-10 11:32:06 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2006m - 2006-10-02 15:32:35 -0400
|
||
|
||
changes for Uruguay, Palestine, and Egypt by Paul Eggert
|
||
|
||
(minimalist) changes to zic.8 to clarify "until" information
|
||
|
||
|
||
Release data2006l - 2006-09-18 12:58:11 -0400
|
||
|
||
Paul's best-effort work on this coming weekend's Egypt time change
|
||
|
||
|
||
Release 2006k - 2006-08-28 12:19:09 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2006j - 2006-08-21 09:56:32 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release code2006i - 2006-08-07 12:30:55 -0400
|
||
|
||
localtime.c fixes
|
||
|
||
Ken Pizzini's conversion script
|
||
|
||
|
||
Release code2006h - 2006-07-24 09:19:37 -0400
|
||
|
||
adds public domain notices to four files
|
||
|
||
includes a fix for transition times being off by a second
|
||
|
||
adds a new recording to the "arts" file (information courtesy Colin Bowern)
|
||
|
||
|
||
Release 2006g - 2006-05-08 17:18:09 -0400
|
||
|
||
northamerica changes by Paul Eggert
|
||
|
||
|
||
Release 2006f - 2006-05-01 11:46:00 -0400
|
||
|
||
a missing version number problem is fixed (with thanks to Bradley
|
||
White for catching the problem)
|
||
|
||
|
||
Release 2006d - 2006-04-17 14:33:43 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
added new items to tz-arts.htm that were found by Paul
|
||
|
||
|
||
Release 2006c - 2006-04-03 10:09:32 -0400
|
||
|
||
two sets of data changes by Paul Eggert
|
||
|
||
a fencepost error fix in zic.c
|
||
|
||
changes to zic.c and the "europe" file to minimize differences
|
||
between output produced by the old 32-bit zic and the new 64-bit
|
||
version
|
||
|
||
|
||
Release 2006b - 2006-02-20 10:08:18 -0500
|
||
[tz32code2006b + tz64code2006b + tzdata2006b]
|
||
|
||
64-bit code
|
||
|
||
All SCCS IDs were bumped to "8.1" for this release.
|
||
|
||
|
||
Release 2006a - 2006-01-30 08:59:31 -0500
|
||
|
||
changes by Paul Eggert (in particular, Indiana time zone moves)
|
||
|
||
an addition to the zic manual page to describe how special-case
|
||
transitions are handled
|
||
|
||
|
||
Release 2005r - 2005-12-27 09:27:13 -0500
|
||
|
||
Canadian changes by Paul Eggert
|
||
|
||
They also add "<pre>" directives to time zone data files and reflect
|
||
changes to warning message logic in "zdump.c" (but with calls to
|
||
"gettext" kept unbundled at the suggestion of Ken Pizzini).
|
||
|
||
|
||
Release 2005q - 2005-12-13 09:17:09 -0500
|
||
|
||
Nothing earth-shaking here:
|
||
1. Electronic mail addresses have been removed.
|
||
2. Casts of the return value of exit have been removed.
|
||
3. Casts of the argument of is.* macros have been added.
|
||
4. Indentation in one section of zic.c has been fixed.
|
||
5. References to dead URLs in the data files have been dealt with.
|
||
|
||
|
||
Release 2005p - 2005-12-05 10:30:53 -0500
|
||
|
||
"systemv", "tz-link.htm", and "zdump.c" changes
|
||
(less the casts of arguments to the is* macros)
|
||
|
||
|
||
Release 2005o - 2005-11-28 10:55:26 -0500
|
||
|
||
Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
|
||
|
||
zdump.c lint fixes by Arthur David Olson
|
||
|
||
|
||
Release 2005n - 2005-10-03 09:44:09 -0400
|
||
|
||
changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan
|
||
et al. changes)
|
||
|
||
|
||
Release 2005m - 2005-08-29 12:15:40 -0400
|
||
|
||
changes by Paul Eggert (with a small tweak to the tz-art change)
|
||
|
||
a declaration of an unused variable has been removed from zdump.c
|
||
|
||
|
||
Release 2005l - 2005-08-22 12:06:39 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
overflow/underflow checks by Arthur David Olson, minus changes to
|
||
the "Theory" file about the pending addition of 64-bit data (I grow
|
||
less confident of the changes being accepted with each passing day,
|
||
and the changes no longer increase the data files nine-fold--there's
|
||
less than a doubling in size by my local Sun's reckoning)
|
||
|
||
|
||
Release 2005k - 2005-07-14 14:14:24 -0400
|
||
|
||
The "leapseconds" file has been edited to reflect the recently
|
||
announced leap second at the end of 2005.
|
||
|
||
I've also deleted electronic mail addresses from the files as an
|
||
anti-spam measure.
|
||
|
||
|
||
Release 2005j - 2005-06-13 14:34:13 -0400
|
||
|
||
These reflect changes to limit the length of time zone abbreviations
|
||
and the characters used in those abbreviations.
|
||
|
||
There are also changes to handle POSIX-style "quoted" timezone
|
||
environment variables.
|
||
|
||
The changes were circulated on the time zone mailing list; the only
|
||
change since then was the removal of a couple of minimum-length of
|
||
abbreviation checks.
|
||
|
||
|
||
Release data2005i - 2005-04-21 15:04:16 -0400
|
||
|
||
changes (most importantly to Nicaragua and Haiti) by Paul Eggert
|
||
|
||
|
||
Release 2005h - 2005-04-04 11:24:47 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
minor changes to Makefile and zdump.c to produce more useful output
|
||
when doing a "make typecheck"
|
||
|
||
|
||
Release 2005g - 2005-03-14 10:11:21 -0500
|
||
|
||
changes by Paul Eggert (a change to current DST rules in Uruguay and
|
||
an update to a link to time zone software)
|
||
|
||
|
||
Release 2005f - 2005-03-01 08:45:32 -0500
|
||
|
||
data and documentation changes by Paul Eggert
|
||
|
||
|
||
Release 2005e - 2005-02-10 15:59:44 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release code2005d - 2005-01-31 09:21:47 -0500
|
||
|
||
make zic complain about links to links if the -v flag is used
|
||
|
||
have "make public" do more code checking
|
||
|
||
add an include to "localtime.c" for the benefit of gcc systems
|
||
|
||
|
||
Release 2005c - 2005-01-17 18:36:29 -0500
|
||
|
||
get better results when mktime runs on a system where time_t is double
|
||
|
||
changes to the data files (most importantly to Paraguay)
|
||
|
||
|
||
Release 2005b - 2005-01-10 09:19:54 -0500
|
||
|
||
Get localtime and gmtime working on systems with exotic time_t types.
|
||
|
||
Update the leap second commentary in the "leapseconds" file.
|
||
|
||
|
||
Release 2005a - 2005-01-01 13:13:44 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release code2004i - 2004-12-14 13:42:58 -0500
|
||
|
||
Deal with systems where time_t is unsigned.
|
||
|
||
|
||
Release code2004h - 2004-12-07 11:40:18 -0500
|
||
|
||
64-bit-time_t changes
|
||
|
||
|
||
Release 2004g - 2004-11-02 09:06:01 -0500
|
||
|
||
update to Cuba (taking effect this weekend)
|
||
|
||
other changes by Paul Eggert
|
||
|
||
correction of the spelling of Oslo
|
||
|
||
changed versions of difftime.c and private.h
|
||
|
||
|
||
Release code2004f - 2004-10-21 10:25:22 -0400
|
||
|
||
Cope with wide-ranging tm_year values.
|
||
|
||
|
||
Release 2004e - 2004-10-11 14:47:21 -0400
|
||
|
||
Brazil/Argentina/Israel changes by Paul Eggert
|
||
|
||
changes to tz-link.htm by Paul
|
||
|
||
one small fix to Makefile
|
||
|
||
|
||
Release 2004d - 2004-09-22 08:27:29 -0400
|
||
|
||
Avoid overflow problems when TM_YEAR_BASE is added to an integer.
|
||
|
||
|
||
Release 2004c - 2004-08-11 12:06:26 -0400
|
||
|
||
asctime-related changes
|
||
|
||
(variants of) some of the documentation changes suggested by Paul Eggert
|
||
|
||
|
||
Release 2004b - 2004-07-19 14:33:35 -0400
|
||
|
||
data changes by Paul Eggert - most importantly, updates for Argentina
|
||
|
||
|
||
Release 2004a - 2004-05-27 12:00:47 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
Handle DST transitions that occur at the end of a month in some
|
||
years but at the start of the following month in other years.
|
||
|
||
Add a copy of the correspondence that's the basis for claims about
|
||
DST in the Navajo Nation.
|
||
|
||
|
||
Release 2003e - 2003-12-15 09:36:47 -0500
|
||
|
||
changes by Arthur David Olson (primarily code changes)
|
||
|
||
changes by Paul Eggert (primarily data changes)
|
||
|
||
minor changes to "Makefile" and "northamerica" (in the latter case,
|
||
optimization of the "Toronto" rules)
|
||
|
||
|
||
Release 2003d - 2003-10-06 09:34:44 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2003c - 2003-09-16 10:47:05 -0400
|
||
|
||
Fix bad returns in zic.c's inleap function.
|
||
Thanks to Bradley White for catching the problem!
|
||
|
||
|
||
Release 2003b - 2003-09-16 07:13:44 -0400
|
||
|
||
Add a "--version" option (and documentation) to the zic and zdump commands.
|
||
|
||
changes to overflow/underflow checking in zic
|
||
|
||
a localtime typo fix.
|
||
|
||
Update the leapseconds and tz-art.htm files.
|
||
|
||
|
||
Release 2003a - 2003-03-24 09:30:54 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
a few additions and modifications to the tz-art.htm file
|
||
|
||
|
||
Release 2002d - 2002-10-15 13:12:42 -0400
|
||
|
||
changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
|
||
|
||
There's also a new time zone quote in "tz-art.htm".
|
||
|
||
|
||
Release 2002c - 2002-04-04 11:55:20 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
Change zic.c to avoid creating symlinks to files that don't exist.
|
||
|
||
|
||
Release 2002b - 2002-01-28 12:56:03 -0500
|
||
|
||
[These change notes are for Release 2002a, which was corrupted.
|
||
2002b was a corrected version of 2002a.]
|
||
|
||
changes by Paul Eggert
|
||
|
||
Update the "leapseconds" file to note that there'll be no leap
|
||
second at the end of June, 2002.
|
||
|
||
Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
|
||
|
||
Change to "difftime.c" to avoid sizeof problems.
|
||
|
||
|
||
Release 2001d - 2001-10-09 13:31:32 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2001c - 2001-06-05 13:59:55 -0400
|
||
|
||
changes by Paul Eggert and Andrew Brown
|
||
|
||
|
||
Release 2001b - 2001-04-05 16:44:38 -0400
|
||
|
||
changes by Paul Eggert (modulo jnorgard's typo fix)
|
||
|
||
tz-art.htm has been HTMLified.
|
||
|
||
|
||
Release 2001a - 2001-03-13 12:57:44 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
An addition to the "leapseconds" file: comments with the text of the
|
||
latest IERS leap second notice.
|
||
|
||
Trailing white space has been removed from data file lines, and
|
||
repeated spaces in "Rule Jordan" lines in the "asia" file have been
|
||
converted to tabs.
|
||
|
||
|
||
Release 2000h - 2000-12-14 15:33:38 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
one typo fix in the "art" file
|
||
|
||
With providence, this is the last update of the millennium.
|
||
|
||
|
||
Release 2000g - 2000-10-10 11:35:22 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
correction of John Mackin's name submitted by Robert Elz
|
||
|
||
Garry Shandling's Daylight Saving Time joke (!?!) from the recent
|
||
Emmy Awards broadcast.
|
||
|
||
|
||
Release 2000f - 2000-08-10 09:31:58 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
Added information in "tz-art.htm" on a Seinfeld reference to DST.
|
||
|
||
Error checking and messages in the "yearistype" script have been
|
||
improved.
|
||
|
||
|
||
Release 2000e - 2000-07-31 09:27:54 -0400
|
||
|
||
data changes by Paul Eggert
|
||
|
||
a change to the default value of the defined constant HAVE_STRERROR
|
||
|
||
the addition of a Dave Barry quote on DST to the tz-arts file
|
||
|
||
|
||
Release 2000d - 2000-04-20 15:43:04 -0400
|
||
|
||
changes to the documentation and code of strftime for C99 conformance
|
||
|
||
a bug fix for date.c
|
||
|
||
These are based on (though modified from) changes by Paul Eggert.
|
||
|
||
|
||
Release 2000c - 2000-03-04 10:31:43 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release 2000b - 2000-02-21 12:16:29 -0500
|
||
|
||
changes by Paul Eggert and Joseph Myers
|
||
|
||
modest tweaks to the tz-art.htm and tz-link.htm files
|
||
|
||
|
||
Release 2000a - 2000-01-18 09:21:26 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
The two hypertext documents have also been renamed.
|
||
|
||
|
||
Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
|
||
|
||
Paul Eggert's changes
|
||
|
||
additions to the "zic" manual page and the "Arts.htm" file
|
||
|
||
|
||
Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release data1999h - 1999-10-07 03:50:29 -0400
|
||
|
||
changes by Paul Eggert to "europe" (most importantly, fixing
|
||
Lithuania and Estonia)
|
||
|
||
|
||
Release 1999g - 1999-09-28 11:06:18 -0400
|
||
|
||
data changes by Paul Eggert (most importantly, the change for
|
||
Lebanon that buys correctness for this coming Sunday)
|
||
|
||
The "code" file contains changes to "Makefile" and "checktab.awk" to
|
||
allow better checking of time zone files before they are published.
|
||
|
||
|
||
Release 1999f - 1999-09-23 09:48:14 -0400
|
||
|
||
changes by Arthur David Olson and Paul Eggert
|
||
|
||
|
||
Release 1999e - 1999-08-17 15:20:54 -0400
|
||
|
||
changes circulated by Paul Eggert, although the change to handling
|
||
of DST-specifying timezone names has been commented out for now
|
||
(search for "XXX" in "localtime.c" for details). These files also
|
||
do not make any changes to the start of DST in Brazil.
|
||
|
||
In addition to Paul's changes, there are updates to "Arts.htm" and
|
||
cleanups of URLs.
|
||
|
||
|
||
Release 1999d - 1999-03-30 11:31:07 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
The Makefile's "make public" rule has also been changed to do a test
|
||
compile of each individual time zone data file (which should help
|
||
avoid problems such as the one we had with Nicosia).
|
||
|
||
|
||
Release 1999c - 1999-03-25 09:47:47 -0500
|
||
|
||
changes by Paul Eggert, most importantly the change for Chile.
|
||
|
||
|
||
Release 1999b - 1999-02-01 17:51:44 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
code changes (suggested by Mani Varadarajan, mani at be.com) for
|
||
correct handling of symbolic links when building using a relative directory
|
||
|
||
code changes to generate correct messages for failed links
|
||
|
||
updates to the URLs in Arts.htm
|
||
|
||
|
||
Release 1999a - 1999-01-19 16:20:29 -0500
|
||
|
||
error message internationalizations and corrections in zic.c and
|
||
zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
|
||
to whom thanks!)
|
||
|
||
|
||
Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
|
||
|
||
changes for Brazil, Chile, and Germany
|
||
|
||
support for use of "24:00" in the input files for the time zone compiler
|
||
|
||
|
||
Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
correction to a define in the "private.h" file
|
||
|
||
|
||
Release data1998g - 1998-08-11 03:28:35 -0000
|
||
[tzdata1998g.tar.gz is missing!]
|
||
|
||
Lithuanian change provided by mgedmin at pub.osf.it
|
||
|
||
Move creation of the GMT link with Etc/GMT to "etcetera" (from
|
||
"backward") to ensure that the GMT file is created even where folks
|
||
don't want the "backward" links (as suggested by Paul Eggert).
|
||
|
||
|
||
Release data1998f - 1998-07-20 13:50:00 -0000
|
||
[tzdata1998f.tar.gz is missing!]
|
||
|
||
Update the "leapseconds" file to include the newly-announced
|
||
insertion at the end of 1998.
|
||
|
||
|
||
Release code1998f - 1998-06-01 10:18:31 -0400
|
||
|
||
addition to localtime.c by Guy Harris
|
||
|
||
|
||
Release 1998e - 1998-05-28 09:56:26 -0400
|
||
|
||
The Makefile is changed to produce zoneinfo-posix rather than
|
||
zoneinfo/posix, and to produce zoneinfo-leaps rather than
|
||
zoneinfo/right.
|
||
|
||
data changes by Paul Eggert
|
||
|
||
changes from Guy Harris to provide asctime_r and ctime_r
|
||
|
||
A usno1998 file (substantially identical to usno1997) has been added.
|
||
|
||
|
||
Release 1998d - 1998-05-14 11:58:34 -0400
|
||
|
||
changes to comments (in particular, elimination of references to CIA maps).
|
||
"Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
|
||
where changes occur.
|
||
|
||
|
||
Release 1998c - 1998-02-28 12:32:26 -0500
|
||
|
||
changes by Paul Eggert (save the "French correction," on which I'll
|
||
wait for the dust to settle)
|
||
|
||
symlink changes
|
||
|
||
changes and additions to Arts.htm
|
||
|
||
|
||
Release 1998b - 1998-01-17 14:31:51 -0500
|
||
|
||
URL cleanups and additions
|
||
|
||
|
||
Release 1998a - 1998-01-13 12:37:35 -0500
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
|
||
|
||
changes by Paul Eggert, with minor modifications from Arthur David
|
||
Olson to make the files more browser friendly
|
||
|
||
|
||
Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
|
||
|
||
minor changes to put "TZif" at the start of each timezone information file
|
||
|
||
a rule has also been added to the Makefile so you can
|
||
make zones
|
||
to just recompile the zone information files (rather than doing a
|
||
full "make install" with its other effects).
|
||
|
||
|
||
Release data1997i - 1997-10-07 08:45:38 -0400
|
||
|
||
changes to Africa by Paul Eggert
|
||
|
||
|
||
Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
|
||
|
||
corrections for Uruguay (and other locations)
|
||
|
||
Arthur David Olson's simple-minded fix allowing mktime to both
|
||
correctly handle leap seconds and correctly handle tm_sec values
|
||
upon which arithmetic has been performed.
|
||
|
||
|
||
Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
|
||
|
||
Paul Eggert's updates
|
||
|
||
a small change to a function prototype;
|
||
|
||
"Music" has been renamed "Arts.htm", HTMLified, and augmented to
|
||
include information on Around the World in Eighty Days.
|
||
|
||
|
||
Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
|
||
|
||
fixes to zic's error handling
|
||
|
||
changes inspired by the item circulated on Slovenia
|
||
|
||
The description of Web resources has been HTMLified for browsing
|
||
convenience.
|
||
|
||
A new piece of tz-related music has been added to the "Music" file.
|
||
|
||
|
||
Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
|
||
|
||
Paul Eggert's latest suggestions
|
||
|
||
|
||
Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
|
||
|
||
changes to "zic.c" to correct performance of the "-s" option
|
||
|
||
a new file "usno1997"
|
||
|
||
|
||
Release data1997c - 1997-03-04 09:58:18 -0500
|
||
|
||
changes in Israel
|
||
|
||
|
||
Release 1997b - 1997-02-27 18:34:19 -0500
|
||
|
||
The data file incorporates the 1997 leap second.
|
||
|
||
The code file incorporates Arthur David Olson's take on the
|
||
zic/multiprocessor/directory-creation situation.
|
||
|
||
|
||
Release 1997a - 1997-01-21 09:11:10 -0500
|
||
|
||
Paul Eggert's Antarctica (and other changes)
|
||
|
||
Arthur David Olson finessed the "getopt" issue by checking against
|
||
both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
|
||
is returned while SunOS 5.5's manual says EOF is returned).
|
||
|
||
|
||
Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
|
||
|
||
Paul Eggert's latest changes
|
||
|
||
|
||
Release code1996n - 1996-12-16 09:42:02 -0500
|
||
|
||
link snapping fix from Bruce Evans (via Garrett Wollman)
|
||
|
||
|
||
Release data1996m - 1996-11-24 02:37:34 -0000
|
||
[tzdata1996m.tar.gz is missing!]
|
||
|
||
Paul Eggert's batch of changes
|
||
|
||
|
||
Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
|
||
|
||
No functional changes here; the files have simply been changed to
|
||
make more use of ISO style dates in comments. The names of the above
|
||
files now include the year in full.
|
||
|
||
|
||
Release code96l - 1996-09-08 17:12:20 -0400
|
||
|
||
tzcode96k was missing a couple of pieces.
|
||
|
||
|
||
Release 96k - 1996-09-08 16:06:22 -0400
|
||
|
||
the latest round of changes from Paul Eggert
|
||
|
||
the recent Year 2000 material
|
||
|
||
|
||
Release code96j - 1996-07-30 13:18:53 -0400
|
||
|
||
Set sp->typecnt as suggested by Timothy Patrick Murphy.
|
||
|
||
|
||
Release code96i - 1996-07-27 20:11:35 -0400
|
||
|
||
Paul's suggested patch for strftime %V week numbers
|
||
|
||
|
||
Release data96i - 1996-07-01 18:13:04 -0400
|
||
|
||
"northamerica" and "europe" changes by Paul Eggert
|
||
|
||
|
||
Release code96h - 1996-06-05 08:02:21 -0400
|
||
|
||
fix for handling transitions specified in Universal Time
|
||
|
||
Some "public domain" notices have also been added.
|
||
|
||
|
||
Release code96g - 1996-05-16 14:00:26 -0400
|
||
|
||
fix for the simultaneous-DST-and-zone-change challenge
|
||
|
||
|
||
Release data96h - 1996-05-09 17:40:51 -0400
|
||
|
||
changes by Paul Eggert
|
||
|
||
|
||
Release code96f-data96g - 1996-05-03 03:09:59 -0000
|
||
[tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
|
||
|
||
The changes get us some of the way to fixing the problems noted in Paul
|
||
Eggert's letter yesterday (in addition to a few others). The approach
|
||
has been to make zic a bit smarter about figuring out what time zone
|
||
abbreviations apply just after the time specified in the "UNTIL" part
|
||
of a zone line. Putting the smarts in zic means avoiding having
|
||
transition times show up in both "Zone" lines and "Rule" lines, which
|
||
in turn avoids multiple transition time entries in time zone files.
|
||
(This also makes the zic input files such as "europe" a bit shorter and
|
||
should ease maintenance.)
|
||
|
||
|
||
Release data96f - 1996-04-19 19:20:03 -0000
|
||
[tzdata96f.tar.gz is missing!]
|
||
|
||
The only changes are to the "northamerica" file; the time zone
|
||
abbreviation for Denver is corrected to MST (and MDT), and the
|
||
comments for Mexico have been updated.
|
||
|
||
|
||
Release data96e - 1996-03-19 17:37:26 -0500
|
||
|
||
Proposals by Paul Eggert, in particular the Portugal change that
|
||
comes into play at the end of this month.
|
||
|
||
|
||
Release data96d - 1996-03-18 20:49:39 -0500
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release code96e - 1996-02-29 15:43:27 -0000
|
||
[tzcode96e.tar.gz is missing!]
|
||
|
||
internationalization changes and the fix to the documentation for strftime
|
||
|
||
|
||
Release code96d-data96c - 1996-02-12 11:05:27 -0500
|
||
|
||
The "code" file simply updates Bob Kridle's electronic address.
|
||
|
||
The "data" file updates rules for Mexico.
|
||
|
||
|
||
Release data96b - 1996-01-27 15:44:42 -0500
|
||
|
||
Kiribati change
|
||
|
||
|
||
Release code96c - 1996-01-16 16:58:15 -0500
|
||
|
||
leap-year streamlining and binary-search changes
|
||
|
||
fix to newctime.3
|
||
|
||
|
||
Release code96b - 1996-01-10 20:42:39 -0500
|
||
|
||
fixes and enhancements from Paul Eggert, including code that
|
||
emulates the behavior of recent versions of the SunOS "date"
|
||
command.
|
||
|
||
|
||
Release 96a - 1996-01-06 09:08:24 -0500
|
||
|
||
Israel updates
|
||
|
||
fixes to strftime.c for correct ISO 8601 week number generation,
|
||
plus support for two new formats ('G' and 'g') to give ISO 8601 year
|
||
numbers (which are not necessarily the same as calendar year numbers)
|
||
|
||
|
||
Release code95i-data95m - 1995-12-21 12:46:47 -0500
|
||
|
||
The latest revisions from Paul Eggert are included, the usno1995
|
||
file has been updated, and a new file ("WWW") covering useful URLs
|
||
has been added.
|
||
|
||
|
||
Release code95h-data95l - 1995-12-19 18:10:12 -0500
|
||
|
||
A simplification of a macro definition, a change to data for Sudan,
|
||
and (for last minute shoppers) notes in the "Music" file on the CD
|
||
"Old Man Time".
|
||
|
||
|
||
Release code95g-data95k - 1995-10-30 10:32:47 -0500
|
||
|
||
(slightly reformatted) 8-bit-clean proposed patch
|
||
|
||
minor patch: US/Eastern -> America/New_York
|
||
|
||
snapshot of the USNO's latest data ("usno1995")
|
||
|
||
some other minor cleanups
|
||
|
||
|
||
Release code95f-data95j - 1995-10-28 21:01:34 -0000
|
||
[tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
|
||
|
||
European cleanups
|
||
|
||
support for 64-bit time_t's
|
||
|
||
optimization in localtime.c
|
||
|
||
|
||
Release code95e - 1995-10-13 13:23:57 -0400
|
||
|
||
the mktime change to scan from future to past when trying to find time zone
|
||
offsets
|
||
|
||
|
||
Release data95i - 1995-09-26 10:43:26 -0400
|
||
|
||
For Canada/Central, guess that the Sun customer's "one week too
|
||
early" was just a approximation, and the true error is one month
|
||
too early. This is consistent with the rest of Canada.
|
||
|
||
|
||
Release data95h - 1995-09-21 11:26:48 -0400
|
||
|
||
latest changes from Paul Eggert
|
||
|
||
|
||
Release code95d - 1995-09-14 11:14:45 -0400
|
||
|
||
the addition of a "Music" file, which documents four recorded
|
||
versions of the tune "Save That Time".
|
||
|
||
|
||
Release data95g - 1995-09-01 17:21:36 -0400
|
||
|
||
"yearistype" correction
|
||
|
||
|
||
Release data95f - 1995-08-28 20:46:56 -0400
|
||
|
||
Paul Eggert's change to the australasia file
|
||
|
||
|
||
Release data95e - 1995-07-08 18:02:34 -0400
|
||
|
||
The only change is a leap second at the end of this year.
|
||
Thanks to Bradley White for forwarding news on the leap second.
|
||
|
||
|
||
Release data95d - 1995-07-03 13:26:22 -0400
|
||
|
||
Paul Eggert's changes
|
||
|
||
|
||
Release data95c - 1995-07-02 19:19:28 -0400
|
||
|
||
changes to "asia", "backward", "europe", and "southamerica"
|
||
(read: northamericacentrics need not apply)
|
||
|
||
|
||
Release code95c - 1995-03-13 14:00:46 -0500
|
||
|
||
one-line fix for sign extension problems in detzcode
|
||
|
||
|
||
Release 95b - 1995-03-04 11:22:38 -0500
|
||
|
||
Minor changes in both:
|
||
|
||
The "code" file contains a workaround for the lack of "unistd.h" in
|
||
Microsoft C++ version 7.
|
||
|
||
The "data" file contains a fixed "Link" for America/Shiprock.
|
||
|
||
|
||
Release 94h - 1994-12-10 12:51:14 -0500
|
||
|
||
The files:
|
||
|
||
* incorporate the changes to "zdump" and "date" to make changes to
|
||
the "TZ" environment variable permanent;
|
||
|
||
* incorporate the table changes by Paul Eggert;
|
||
|
||
* include (and document) support for universal time specifications in
|
||
data files - but do not (yet) include use of this feature in the
|
||
data files.
|
||
|
||
Think of this as "TZ Classic" - the software has been set up not to break if
|
||
universal time shows up in its input, and data entries have been
|
||
left as is so as not to break existing implementations.
|
||
|
||
|
||
Release data94f - 1994-08-20 12:56:09 -0400
|
||
|
||
(with thanks!) the latest data updates from Paul Eggert
|
||
|
||
|
||
Release data94e - 1994-06-04 13:13:53 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release code94g - 1994-05-05 12:14:07 -0400
|
||
|
||
fix missing "optind.c" and a reference to it in the Makefile
|
||
|
||
|
||
Release code94f - 1994-05-05 13:00:33 -0000
|
||
[tzcode94f.tar.gz is missing!]
|
||
|
||
changes to avoid overflow in difftime, as well as changes to cope
|
||
with the 52/53 challenge in strftime
|
||
|
||
|
||
Release code94e - 1994-03-30 23:32:59 -0500
|
||
|
||
change for the benefit of PCTS
|
||
|
||
|
||
Release 94d - 1994-02-24 15:42:25 -0500
|
||
|
||
Avoid clashes with POSIX semantics for zones such as GMT+4.
|
||
|
||
Some other very minor housekeeping is also present.
|
||
|
||
|
||
Release code94c - 1994-02-10 08:52:40 -0500
|
||
|
||
Fix bug where mkdirs was broken unless you compile with
|
||
-fwritable-strings (which is generally losing to do).
|
||
|
||
|
||
Release 94b - 1994-02-07 10:04:33 -0500
|
||
|
||
work by Paul Eggert who notes:
|
||
|
||
I found another book of time zone histories by E W Whitman; it's not
|
||
as extensive as Shanks but has a few goodies of its own. I used it
|
||
to update the tables. I also fixed some more as a result of
|
||
correspondence with Adam David and Peter Ilieve, and move some stray
|
||
links from 'europe' to 'backward'. I corrected some scanning errors
|
||
in usno1989.
|
||
|
||
As far as the code goes, I fixed zic to allow years in the range
|
||
INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
|
||
And I cleaned up the zic documentation a little bit.
|
||
|
||
|
||
Release data94a - 1994-02-03 08:58:54 -0500
|
||
|
||
It simply incorporates the recently announced leap second into the
|
||
"leapseconds" file.
|
||
|
||
|
||
Release 93g - 1993-11-22 17:28:27 -0500
|
||
|
||
Paul Eggert has provided a good deal of historic information (based
|
||
on Shanks), and there are some code changes to deal with the buglets
|
||
that crawled out in dealing with the new information.
|
||
|
||
|
||
Release 93f - 1993-10-15 12:27:46 -0400
|
||
|
||
Paul Eggert's changes
|
||
|
||
|
||
Release 93e - 1993-09-05 21:21:44 -0400
|
||
|
||
This has updated data for Israel, England, and Kwajalein. There's
|
||
also an update to "zdump" to cope with Kwajalein's 24-hour jump.
|
||
Thanks to Paul Eggert and Peter Ilieve for the changes.
|
||
|
||
|
||
Release 93d - 1993-06-17 23:34:17 -0400
|
||
|
||
new fix and new data on Israel
|
||
|
||
|
||
Release 93c - 1993-06-06 19:31:55 -0400
|
||
|
||
[not summarized]
|
||
|
||
|
||
Release 93b - 1993-02-02 14:53:58 -0500
|
||
|
||
updated "leapseconds" file
|
||
|
||
|
||
Release 93 - 1993-01-08 07:01:06 -0500
|
||
|
||
At kre's suggestion, the package has been split in two - a code piece
|
||
(which also includes documentation) that's only of use to folks who
|
||
want to recompile things and a data piece useful to anyone who can
|
||
run "zic".
|
||
|
||
The new version has a few changes to the data files, a few
|
||
portability changes, and an off-by-one fix (with thanks to
|
||
Tom Karzes at deshaw.com for providing a description and a
|
||
solution).
|
||
|
||
|
||
Release 92c - 1992-11-21 17:35:36 -0000
|
||
[tz92c.tar.Z is missing!]
|
||
|
||
The fallout from the latest round of DST transitions.
|
||
|
||
There are changes for Portugal, Saskatchewan, and "Pacific-New";
|
||
there's also a change to "zic.c" that makes it portable to more systems.
|
||
|
||
|
||
Release 92 - 1992-04-25 18:17:03 -0000
|
||
[tz92.tar.Z is missing!]
|
||
|
||
By popular demand (well, at any rate, following a request by kre at munnari)
|
||
|
||
|
||
The 1989 update of the time zone package featured:
|
||
|
||
* POSIXization (including interpretation of POSIX-style TZ environment
|
||
variables, provided by Guy Harris),
|
||
* ANSIfication (including versions of "mktime" and "difftime"),
|
||
* SVIDulation (an "altzone" variable)
|
||
* MACHination (the "gtime" function)
|
||
* corrections to some time zone data (including corrections to the rules
|
||
for Great Britain and New Zealand)
|
||
* reference data from the United States Naval Observatory for folks who
|
||
want to do additional time zones
|
||
* and the 1989 data for Saudi Arabia.
|
||
|
||
(Since this code will be treated as "part of the implementation" in some
|
||
places and as "part of the application" in others, there's no good way to
|
||
name functions, such as timegm, that are not part of the proposed ANSI C
|
||
standard; such functions have kept their old, underscore-free names in this
|
||
update.)
|
||
|
||
And the "dysize" function has disappeared; it was present to allow
|
||
compilation of the "date" command on old BSD systems, and a version of "date"
|
||
is now provided in the package. The "date" command is not created when you
|
||
"make all" since it may lack options provided by the version distributed with
|
||
your operating system, or may not interact with the system in the same way
|
||
the native version does.
|
||
|
||
Since POSIX frowns on correct leap second handling, the default behavior of
|
||
the "zic" command (in the absence of a "-L" option) has been changed to omit
|
||
leap second information from its output files.
|
||
|
||
|
||
-----
|
||
Notes
|
||
|
||
This file contains copies of the part of each release announcement
|
||
that talks about the changes in that release. The text has been
|
||
adapted and reformatted for the purposes of this file.
|
||
|
||
Traditionally a release R consists of a pair of tarball files,
|
||
tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g.,
|
||
code2010a, data2012c) consist of just one or the other tarball, and a
|
||
few (e.g., code2012c-data2012d) have tarballs with mixed version
|
||
numbers. Recent releases also come in an experimental format
|
||
consisting of a single tarball tzdb-R.tar.lz with extra data.
|
||
|
||
Release timestamps are taken from the release's commit (for newer,
|
||
Git-based releases), from the newest file in the tarball (for older
|
||
releases, where this info is available) or from the email announcing
|
||
the release (if all else fails; these are marked with a time zone
|
||
abbreviation of -0000 and an "is missing!" comment).
|
||
|
||
Earlier versions of the code and data were not announced on the tz
|
||
list and are not summarized here.
|
||
|
||
This file is in the public domain.
|
||
|
||
Local Variables:
|
||
coding: utf-8
|
||
End:
|