1605 lines
60 KiB
Plaintext
1605 lines
60 KiB
Plaintext
# @(#)northamerica 7.53
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# also includes Central America and the Caribbean
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# $FreeBSD$
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# This data is by no means authoritative; if you think you know better,
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# go ahead and edit the file (and please send any changes to
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# tz@elsie.nci.nih.gov for general use in the future).
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# From Paul Eggert <eggert@twinsun.com> (1999-03-22):
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# A reliable and entertaining source about time zones is
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# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
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###############################################################################
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# United States
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# From Paul Eggert (1999-03-31):
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# Howse writes (pp 121-125) that time zones were invented by
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# Professor Charles Ferdinand Dowd (1825-1904),
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# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
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# His pamphlet ``A System of National Time for Railroads'' (1870)
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# was the result of his proposals at the Convention of Railroad Trunk Lines
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# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
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# but in 1872-05 he moved the proposed origin to Greenwich.
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# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
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# and the most of the country soon followed suit.
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# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
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# A good source for time zone historical data in the US is
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# Thomas G. Shanks, The American Atlas (5th edition),
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# San Diego: ACS Publications, Inc. (1991).
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# Make sure you have the errata sheet; the book is somewhat useless without it.
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# It is the source for the US and Puerto Rico entries below.
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# From Paul Eggert (1996-06-12):
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# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
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# in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784).
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# Not everyone is happy with the results:
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#
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# I don't really care how time is reckoned so long as there is some
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# agreement about it, but I object to being told that I am saving
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# daylight when my reason tells me that I am doing nothing of the kind.
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# I even object to the implication that I am wasting something
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# valuable if I stay in bed after the sun has risen. As an admirer
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# of moonlight I resent the bossy insistence of those who want to
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# reduce my time for enjoying it. At the back of the Daylight Saving
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# scheme I detect the bony, blue-fingered hand of Puritanism, eager
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# to push people into bed earlier, and get them up earlier, to make
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# them healthy, wealthy and wise in spite of themselves.
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#
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# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday
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# From Arthur David Olson:
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# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
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# See, for example, the front page of the Saturday, 1974-10-26
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# and Sunday, 1974-10-27 editions of the Washington Post.
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# From Arthur David Olson:
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# Before the Uniform Time Act of 1966 took effect in 1967, observance of
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# Daylight Saving Time in the US was by local option, except during wartime.
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# From Arthur David Olson (2000-09-25):
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# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
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# In the introduction, Oboler spoke of "Eastern Peace Time."
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# An AltaVista search turned up
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# <a href="http://rowayton.org/rhs/hstaug45.html">:
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# "When the time is announced over the radio now, it is 'Eastern Peace
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# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
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# </a> (August 1945) by way of confirmation.
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# From Joseph Gallant <notquite@hotmail.com>, citing
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# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
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# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
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# to switch to London for Atlee's address, but the American people
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# never got to hear his speech live. According to one press account,
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# CBS' Bob Trout was first to announce the word of Japan's surrender,
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# but a few seconds later, NBC, ABC and Mutual also flashed the word
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# of surrender, all of whom interrupting the bells of Big Ben in
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# London which were to precede Mr. Atlee's speech.
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# From Paul Eggert (2000-10-02):
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# Shanks says that DST was called "War Time" in the US in 1919.
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# In the light of the above, this seems suspect;
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# but we have no better authority yet.
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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Rule US 1918 1919 - Mar lastSun 2:00 1:00 W # War
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Rule US 1918 1919 - Oct lastSun 2:00 0 S
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Rule US 1942 only - Feb 9 2:00 1:00 W # War
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Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
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Rule US 1945 only - Sep 30 2:00 0 S
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Rule US 1967 max - Oct lastSun 2:00 0 S
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Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
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Rule US 1974 only - Jan 6 2:00 1:00 D
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Rule US 1975 only - Feb 23 2:00 1:00 D
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Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
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Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
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# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:">
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# H.R.177
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# </a> (introduced 1999-01-06) would change April to March in the above rule.
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# From Bob Devine (1988-01-28):
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# ...Alaska (and Hawaii) had the timezone names changed in 1967.
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# old new
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# Pacific Standard Time(PST) -same-
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# Yukon Standard Time(YST) -same-
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# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
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# Nome Standard Time (NT) Bering Standard Time (BST)
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#
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# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
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# The YST zone now covers nearly all of the state, AHST just part
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# of the Aleutian islands. No DST.
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# From Paul Eggert (1995-12-19):
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# The tables below use `NST', not `NT', for Nome Standard Time.
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# I invented `CAWT' for Central Alaska War Time.
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# From U. S. Naval Observatory (1989-01-19):
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# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
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# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
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# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
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# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
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# USA MOUNTAIN 7 H BEHIND UTC DENVER
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# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
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# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
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# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
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# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
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# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
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# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
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# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
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# USA HAWAII 10 H BEHIND UTC
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# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
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# From Arthur David Olson (1989-01-21):
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# The above dates are for 1988.
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# Note the "AKST" and "AKDT" abbreviations, the claim that there's
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# no DST in Samoa, and the claim that there is DST in Alaska and the
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# Aleutians.
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# From Arthur David Olson (1988-02-13):
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# Legal standard time zone names, from United States Code (1982 Edition and
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# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
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# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
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# took effect), as explained in sections 263 and 261:
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# (none)
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# United States standard eastern time
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# United States standard mountain time
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# United States standard central time
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# United States standard Pacific time
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# (none)
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# United States standard Alaska time
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# (none)
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# Next, names from 1967-04-01 until 1983-11-30 (the date for
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# public law 98-181):
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# Atlantic standard time
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# eastern standard time
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# central standard time
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# mountain standard time
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# Pacific standard time
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# Yukon standard time
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# Alaska-Hawaii standard time
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# Bering standard time
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# And after 1983-11-30:
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# Atlantic standard time
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# eastern standard time
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# central standard time
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# mountain standard time
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# Pacific standard time
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# Alaska standard time
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# Hawaii-Aleutian standard time
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# Samoa standard time
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# The law doesn't give abbreviations.
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#
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# From Paul Eggert (1995-12-19):
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# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
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# Go with Shanks.
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# US Eastern time, represented by New York
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# Connecticut, Delaware, District of Columbia, most of Florida,
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# Georgia, far southeastern Indiana, eastern Kentucky, Maine,
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# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North
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# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern
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# Tennessee, Vermont, Virginia, West Virginia
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
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Rule NYC 1920 only - Oct lastSun 2:00 0 S
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Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
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Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
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Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00
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-5:00 US E%sT 1920
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-5:00 NYC E%sT 1942
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-5:00 US E%sT 1946
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-5:00 NYC E%sT 1967
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-5:00 US E%sT
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# US Central time, represented by Chicago
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# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
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# corners, Iowa, most of Kansas, western Kentucky, Louisiana,
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# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North
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# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of
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# Texas, Wisconsin
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule Chicago 1920 only - Jun 13 2:00 1:00 D
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Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
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Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
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Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
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Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
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Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00
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-6:00 US C%sT 1920
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-6:00 Chicago C%sT 1936 Mar 1 2:00
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-5:00 - EST 1936 Nov 15 2:00
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-6:00 Chicago C%sT 1942
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-6:00 US C%sT 1946
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-6:00 Chicago C%sT 1967
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-6:00 US C%sT
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# US Mountain time, represented by Denver
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#
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# Colorado, southern Idaho, far western Kansas, Montana, western
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# Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon,
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# western South Dakota, far western Texas, Utah, Wyoming
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#
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
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Rule Denver 1920 only - Oct lastSun 2:00 0 S
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Rule Denver 1921 only - May 22 2:00 0 S
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Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
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Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00
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-7:00 US M%sT 1920
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-7:00 Denver M%sT 1942
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-7:00 US M%sT 1946
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-7:00 Denver M%sT 1967
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-7:00 US M%sT
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# US Pacific time, represented by Los Angeles
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#
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# California, northern Idaho, Nevada, most of Oregon, and Washington
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#
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule CA 1948 only - Mar 14 2:00 1:00 D
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Rule CA 1949 only - Jan 1 2:00 0 S
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Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
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Rule CA 1950 1961 - Sep lastSun 2:00 0 S
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Rule CA 1962 1966 - Oct lastSun 2:00 0 S
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00
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-8:00 US P%sT 1946
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-8:00 CA P%sT 1967
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-8:00 US P%sT
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# Alaska
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# AK%sT is the modern abbreviation for -9:00 per USNO.
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#
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# From Paul Eggert (1995-12-19):
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# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
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# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
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# This was on 1867-10-18. We omit this transition, since we can't represent
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# changes from Julian to Gregorian.
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#
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Juneau -8:57:41 - LMT 1900 Aug 20 12:00
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-8:00 - PST 1942
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-8:00 US P%sT 1946
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-8:00 - PST 1969
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-8:00 US P%sT 1983 Oct 30 2:00
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-9:00 US AK%sT
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Zone America/Yakutat -9:18:55 - LMT 1900 Aug 20 12:00
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-9:00 - YST 1942
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-9:00 US Y%sT 1946
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-9:00 - YST 1969
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-9:00 US Y%sT 1983 Oct 30 2:00
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-9:00 US AK%sT
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Zone America/Anchorage -9:59:36 - LMT 1900 Aug 20 12:00
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-10:00 - CAT 1942
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-10:00 US CAT/CAWT 1946
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-10:00 - CAT 1967 Apr
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-10:00 - AHST 1969
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-10:00 US AH%sT 1983 Oct 30 2:00
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-9:00 US AK%sT
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Zone America/Nome -11:01:38 - LMT 1900 Aug 20 12:00
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-11:00 - NST 1942
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-11:00 US N%sT 1946
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-11:00 - NST 1967 Apr
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-11:00 - BST 1969
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-11:00 US B%sT 1983 Oct 30 2:00
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-9:00 US AK%sT
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Zone America/Adak -11:46:38 - LMT 1900 Aug 20 12:00
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-11:00 - NST 1942
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-11:00 US N%sT 1946
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-11:00 - NST 1967 Apr
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-11:00 - BST 1969
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-11:00 US B%sT 1983 Oct 30 2:00
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-10:00 US HA%sT
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# Shanks writes that part of southwest Alaska (e.g. Aniak)
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# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
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# and another part (e.g. Akiak) made the same switch five weeks later.
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# These switches don't quite make our 1970 cutoff.
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# Hawaii
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#
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# From Arthur David Olson:
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# And then there's Hawaii.
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# DST was observed for one day in 1933;
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# standard time was changed by half an hour in 1947;
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# it's always standard as of 1986.
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#
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# From Paul Eggert:
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# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks.
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#
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Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00
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-10:30 - HST 1933 Apr 30 2:00
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-10:30 1:00 HDT 1933 May 21 2:00
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-10:30 US H%sT 1947 Jun 8 2:00
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-10:00 - HST
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# Now we turn to US areas that have diverged from the consensus since 1970.
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# Arizona mostly uses MST.
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Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00
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-7:00 US M%sT 1944 Jan 1 00:01
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-7:00 - MST 1944 Mar 17 00:01
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-7:00 US M%sT 1944 Oct 1 00:01
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-7:00 - MST 1967
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-7:00 US M%sT 1968
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-7:00 - MST
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# From Arthur David Olson (1988-02-13):
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# A writer from the Inter Tribal Council of Arizona, Inc.,
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# notes in private correspondence dated 12/28/87 that "Presently, only the
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# Navajo Nation participates in the Daylight Saving Time policy, due to its
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# large size and location in three states." (The "only" means that other
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# tribal nations don't use DST.)
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Link America/Denver America/Shiprock
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# Southern Idaho and eastern Oregon switched four weeks late in 1974.
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00
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-8:00 US P%sT 1923 May 13 2:00
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-7:00 US M%sT 1974
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-7:00 - MST 1974 Feb 3 2:00
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-7:00 US M%sT
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# Indiana
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#
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# For a map of Indiana's time zone regions, see:
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# <a href="http://www.mccsc.edu/time.html">
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# What time is it in Indiana?
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# </a> (1999-04-06)
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#
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# From Paul Eggert (1995-12-19):
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# Indiana generally observes either EST all year, or CST/CDT,
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# but areas near Cincinnati and Louisville use those cities' timekeeping
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# and in 1969 and 1970 the whole state observed daylight time;
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# and there are other exceptions as noted below.
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# Shanks partitions Indiana into 345 regions, each with its own time history,
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# and writes ``Even newspaper reports present contradictory information.''
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# Fortunately, most of the complexity occurred before our cutoff date of 1970.
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#
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# Since 1970, EST-only Indiana has been like America/Indianapolis,
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# with exceptions noted below for Crawford, Starke, and Switzerland counties.
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# The parts of Indiana not listed below have been like America/Chicago,
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# America/Louisville, or America/New_York.
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#
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# Other than Indianapolis, the Indiana place names are so nondescript
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# that they would be ambiguous if we left them at the `America' level.
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# So we reluctantly put them all in a subdirectory `America/Indiana'.
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#
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# Most of EST-only Indiana last observed DST in 1970.
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
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Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
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Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00
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-6:00 US C%sT 1920
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-6:00 Indianapolis C%sT 1942
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-6:00 US C%sT 1946
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-6:00 Indianapolis C%sT 1955 Apr 24 2:00
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-5:00 - EST 1957 Sep 29 2:00
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-6:00 - CST 1958 Apr 27 2:00
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-5:00 - EST 1969
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-5:00 US E%sT 1971
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-5:00 - EST
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Link America/Indianapolis America/Indiana/Indianapolis
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#
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# Part of Crawford County, Indiana, last observed DST in 1975,
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# and left its clocks alone in 1974.
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
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Rule Marengo 1951 only - Sep lastSun 2:00 0 S
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Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
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Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
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# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00
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-6:00 US C%sT 1951
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-6:00 Marengo C%sT 1961 Apr 30 2:00
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-5:00 - EST 1969
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-5:00 US E%sT 1974 Jan 6 2:00
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-6:00 1:00 CDT 1974 Oct 27 2:00
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-5:00 US E%sT 1976
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-5:00 - EST
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#
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# Starke County, Indiana
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# From Arthur David Olson (1991-10-28):
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# An article on page A3 of the Sunday, 1991-10-27 Washington Post
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# notes that Starke County switched from Central time to Eastern time as of
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# 1991-10-27.
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# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
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Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
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Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
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Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
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Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
|
|
Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00
|
|
-6:00 US C%sT 1947
|
|
-6:00 Starke C%sT 1962 Apr 29 2:00
|
|
-5:00 - EST 1963 Oct 27 2:00
|
|
-6:00 US C%sT 1991 Oct 27 2:00
|
|
-5:00 - EST
|
|
#
|
|
# Switzerland County, Indiana, last observed DST in 1972.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00
|
|
-6:00 US C%sT 1954 Apr 25 2:00
|
|
-5:00 - EST 1969
|
|
-5:00 US E%sT 1973
|
|
-5:00 - EST
|
|
|
|
# Part of Kentucky left its clocks alone in 1974.
|
|
# This also includes a part of Indiana immediately adjacent to Louisville.
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
|
|
Rule Louisville 1921 only - May 1 2:00 1:00 D
|
|
Rule Louisville 1921 only - Sep 1 2:00 0 S
|
|
Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
|
|
Rule Louisville 1941 only - Sep lastSun 2:00 0 S
|
|
Rule Louisville 1946 only - Jun 2 2:00 0 S
|
|
Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
|
|
Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00
|
|
-6:00 US C%sT 1921
|
|
-6:00 Louisville C%sT 1942
|
|
-6:00 US C%sT 1946
|
|
-6:00 Louisville C%sT 1961 Jul 23 2:00
|
|
-5:00 - EST 1968
|
|
-5:00 US E%sT 1974 Jan 6 2:00
|
|
-6:00 1:00 CDT 1974 Oct 27 2:00
|
|
-5:00 US E%sT
|
|
Link America/Louisville America/Kentucky/Louisville
|
|
#
|
|
# Wayne, Clinton, and Russell Counties, Kentucky
|
|
#
|
|
# From
|
|
# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
|
|
# Lake Cumberland LIFE
|
|
# </a> (1999-01-29) via WKYM-101.7:
|
|
# Clinton County has joined Wayne County in asking the DoT to change from
|
|
# the Central to the Eastern time zone.... The Wayne County government made
|
|
# the same request in December. And while Russell County officials have not
|
|
# taken action, the majority of respondents to a poll conducted there in
|
|
# August indicated they would like to change to "fast time" also.
|
|
# The three Lake Cumberland counties are the farthest east of any U.S.
|
|
# location in the Central time zone.
|
|
#
|
|
# From Rich Wales (2000-08-29):
|
|
# After prolonged debate, and despite continuing deep differences of opinion,
|
|
# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
|
|
# (-0500) time. They won't "fall back" this year. See:
|
|
# <a href="http://www.nandotimes.com/nation/story/body/0,1037,500244845-500362432-502132762-0,00.html">
|
|
# Sara Shipley, the difference an hour makes (2000-08-29 15:33 -0400)
|
|
# </a>
|
|
Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00
|
|
-6:00 US C%sT 1946
|
|
-6:00 - CST 1968
|
|
-6:00 US C%sT 2000 Oct 29 2:00
|
|
-5:00 US E%sT
|
|
|
|
|
|
# From Rives McDow (2000-08-30):
|
|
# Here ... are all the changes in the US since 1985.
|
|
# Kearny County, KS (put all of county on central;
|
|
# previously split between MST and CST) ... 1990-10
|
|
# Starke County, IN (from CST to EST) ... 1991-10
|
|
# Oliver County, ND (from MST to CST) ... 1992-10
|
|
# West Wendover, NV (from PST TO MST) ... 1999-10
|
|
# Wayne County, KY (from CST to EST) ... 2000-10
|
|
# There is another change in the offing; Mercer County, ND is looking
|
|
# to change from MT to CT. It is possible that two other ND counties
|
|
# (Sioux and Morton) will look to change also. If made, the earliest
|
|
# a change would be effective is October 2001.
|
|
#
|
|
# From Paul Eggert (2000-10-02):
|
|
# FIXME: I haven't yet had time to incorporate all the above changes.
|
|
|
|
# Michigan
|
|
#
|
|
# From Bob Devine (1988-01-28):
|
|
# Michigan didn't observe DST from 1968 to 1973.
|
|
#
|
|
# From Paul Eggert (1999-03-31):
|
|
# Shanks writes that Michigan started using standard time on 1885-09-18,
|
|
# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
|
|
# that Detroit kept
|
|
#
|
|
# local time until 1900 when the City Council decreed that clocks should
|
|
# be put back twenty-eight minutes to Central Standard Time. Half the
|
|
# city obeyed, half refused. After considerable debate, the decision
|
|
# was rescinded and the city reverted to Sun time. A derisive offer to
|
|
# erect a sundial in front of the city hall was referred to the
|
|
# Committee on Sewers. Then, in 1905, Central time was adopted
|
|
# by city vote.
|
|
#
|
|
# This story is too entertaining to be false, so go with Howse over Shanks.
|
|
#
|
|
# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
|
|
Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
|
|
Rule Detroit 1948 only - Sep lastSun 2:00 0 S
|
|
Rule Detroit 1967 only - Jun 14 2:00 1:00 D
|
|
Rule Detroit 1967 only - Oct lastSun 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Detroit -5:32:11 - LMT 1905
|
|
-6:00 - CST 1915 May 15 2:00
|
|
-5:00 - EST 1942
|
|
-5:00 US E%sT 1946
|
|
-5:00 Detroit E%sT 1973
|
|
-5:00 US E%sT 1975
|
|
-5:00 - EST 1975 Apr 27 2:00
|
|
-5:00 US E%sT
|
|
#
|
|
# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
|
|
Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
|
|
Rule Menominee 1946 only - Sep lastSun 2:00 0 S
|
|
Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
|
|
Rule Menominee 1966 only - Oct lastSun 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
|
|
-6:00 US C%sT 1946
|
|
-6:00 Menominee C%sT 1969 Apr 27 2:00
|
|
-5:00 - EST 1973 Apr 29 2:00
|
|
-6:00 US C%sT
|
|
|
|
# Navassa
|
|
# claimed by US under the provisions of the 1856 Guano Islands Act
|
|
# also claimed by Haiti
|
|
# occupied 1857/1900 by the Navassa Phosphate Co
|
|
# US lighthouse 1917/1997-01
|
|
# currently uninhabited
|
|
# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
|
|
# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
|
|
# Jimmy Skaggs, _The Great Guano Rush_ (1994).
|
|
|
|
# Old names, for S5 users
|
|
|
|
# Link LINK-FROM LINK-TO
|
|
Link America/New_York EST5EDT
|
|
Link America/Chicago CST6CDT
|
|
Link America/Denver MST7MDT
|
|
Link America/Los_Angeles PST8PDT
|
|
Link America/Indianapolis EST
|
|
Link America/Phoenix MST
|
|
Link Pacific/Honolulu HST
|
|
|
|
################################################################################
|
|
|
|
|
|
# From Paul Eggert <eggert@twinsun.com> (1999-10-29):
|
|
# A good source for time zone historical data outside the US is
|
|
# Thomas G. Shanks, The International Atlas (5th edition),
|
|
# San Diego: ACS Publications, Inc. (1999).
|
|
#
|
|
# Gwillim Law <Gwil_Law@bridge-point.com> writes that a good source
|
|
# for recent time zone data is the International Air Transport
|
|
# Association's Standard Schedules Information Manual (IATA SSIM),
|
|
# published semiannually. Law sent in several helpful summaries
|
|
# of the IATA's data after 1990.
|
|
#
|
|
# Except where otherwise noted, Shanks is the source for entries through 1990,
|
|
# and IATA SSIM is the source for entries after 1990.
|
|
#
|
|
# Another source occasionally used is Edward W. Whitman, World Time Differences,
|
|
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
|
|
# I found in the UCLA library.
|
|
#
|
|
# See the `europe' file for Greenland.
|
|
|
|
# Canada
|
|
|
|
# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14):
|
|
# I post here the time zone abbreviations standardized in Canada
|
|
# for both English and French in the CAN/CSA-Z234.4-89 standard....
|
|
#
|
|
# UTC Standard time Daylight savings time
|
|
# offset French English French English
|
|
# -2:30 - - HAT NDT
|
|
# -3 - - HAA ADT
|
|
# -3:30 HNT NST - -
|
|
# -4 HNA AST HAE EDT
|
|
# -5 HNE EST HAC CDT
|
|
# -6 HNC CST HAR MDT
|
|
# -7 HNR MST HAP PDT
|
|
# -8 HNP PST HAY YDT
|
|
# -9 HNY YST - -
|
|
#
|
|
# HN: Heure Normale ST: Standard Time
|
|
# HA: Heure Avanc<e'>e DT: Daylight saving Time
|
|
#
|
|
# A: de l'Atlantique Atlantic
|
|
# C: du Centre Central
|
|
# E: de l'Est Eastern
|
|
# M: Mountain
|
|
# N: Newfoundland
|
|
# P: du Pacifique Pacific
|
|
# R: des Rocheuses
|
|
# T: de Terre-Neuve
|
|
# Y: du Yukon Yukon
|
|
#
|
|
# From Paul Eggert <eggert@twinsun.com> (1994-11-22):
|
|
# Alas, this sort of thing must be handled by localization software.
|
|
|
|
# Unless otherwise specified, the data for Canada are all from Shanks.
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# H. David Matthews and Mary Vincent's map
|
|
# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm">
|
|
# "It's about TIME", _Canadian Geographic_ (September-October 1998)
|
|
# </a> contains detailed boundaries for regions observing nonstandard
|
|
# time and daylight saving time arrangements in Canada circa 1998.
|
|
#
|
|
# INMS, the Institute for National Measurement Standards in Ottawa, has
|
|
# <a href="http://www.nrc.ca/inms/time/tze.html">
|
|
# information about standard and daylight saving time zones in Canada.
|
|
# </a> (updated periodically).
|
|
# Its unofficial information is often taken from Matthews and Vincent.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Canada 1918 only - Apr 14 2:00 1:00 D
|
|
Rule Canada 1918 only - Oct 31 2:00 0 S
|
|
Rule Canada 1942 only - Feb 9 2:00 1:00 D
|
|
Rule Canada 1945 only - Sep 30 2:00 0 S
|
|
Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Canada 1974 max - Oct lastSun 2:00 0 S
|
|
Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
|
|
|
|
# Newfoundland (and far southeast Labrador)
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
|
|
# but the only part of Labrador that follows the rules is the
|
|
# southeast corner, including Port Hope Simpson and Mary's Harbour,
|
|
# but excluding, say, Black Tickle.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
|
|
Rule StJohns 1917 only - Sep 17 2:00 0 S
|
|
Rule StJohns 1918 only - Oct 31 2:00 0 S
|
|
# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
|
|
Rule StJohns 1919 only - May 5 23:00 1:00 D
|
|
Rule StJohns 1919 only - Aug 12 23:00 0 S
|
|
# For 1931-1935 Whitman gives Apr same date; go with Shanks.
|
|
Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
|
|
Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
|
|
# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
|
|
Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D
|
|
Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S
|
|
# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
|
|
Rule StJohns 1942 only - Mar 1 0:00 1:00 D
|
|
Rule StJohns 1942 only - Dec 31 0:00 0 S
|
|
Rule StJohns 1943 only - May 30 0:00 1:00 D
|
|
Rule StJohns 1943 only - Sep 5 0:00 0 S
|
|
Rule StJohns 1944 only - Jul 10 0:00 1:00 D
|
|
Rule StJohns 1944 only - Sep 2 0:00 0 S
|
|
Rule StJohns 1945 only - Jan 1 0:00 1:00 D
|
|
Rule StJohns 1945 only - Oct 7 2:00 0 S
|
|
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
|
|
# Apr 30 - Sep 24; go with Shanks.
|
|
Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
|
|
Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
|
|
Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
|
|
Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
|
|
# From Paul Eggert (2000-10-02):
|
|
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
|
|
# at 00:01 local time. For now, assume it started in 1987.
|
|
Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
|
|
Rule StJohns 1987 max - Oct lastSun 0:01 0 S
|
|
Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
|
|
Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D
|
|
# St John's has an apostrophe, but Posix file names can't have apostrophes.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/St_Johns -3:30:52 - LMT 1884
|
|
-3:30:52 StJohns N%sT 1935 Mar 30
|
|
-3:30 StJohns N%sT
|
|
|
|
|
|
# most of east Labrador
|
|
|
|
# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
|
|
-3:30:52 StJohns NST 1919
|
|
-3:30:52 - NST 1935 Mar 30
|
|
-3:30 - NST 1936
|
|
-3:30 StJohns N%sT 1966 Mar 15 2:00
|
|
-4:00 StJohns A%sT
|
|
|
|
|
|
# west Labrador, New Brunswick, Nova Scotia, Prince Edward I
|
|
|
|
# From Paul Eggert (1996-06-12):
|
|
# Shanks writes that since 1970 most of this region has been like Halifax.
|
|
# Many locales did not observe peacetime DST until 1972;
|
|
# Glace Bay, NS is the largest that we know of.
|
|
# Shanks also writes that Liverpool, NS was the only town in Canada to observe
|
|
# DST in 1971 but not 1970; for now we'll assume this is a typo.
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
|
|
# at 00:01 local time. FIXME: verify and create a new Zone for this.
|
|
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Halifax 1916 only - Apr 1 0:00 1:00 D
|
|
Rule Halifax 1916 only - Oct 1 0:00 0 S
|
|
Rule Halifax 1918 only - Apr 14 2:00 1:00 D
|
|
Rule Halifax 1918 only - Oct 31 2:00 0 S
|
|
Rule Halifax 1920 only - May 9 0:00 1:00 D
|
|
Rule Halifax 1920 only - Aug 29 0:00 0 S
|
|
Rule Halifax 1921 only - May 6 0:00 1:00 D
|
|
Rule Halifax 1921 1922 - Sep 5 0:00 0 S
|
|
Rule Halifax 1922 only - Apr 30 0:00 1:00 D
|
|
Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
|
|
Rule Halifax 1923 only - Sep 4 0:00 0 S
|
|
Rule Halifax 1924 only - Sep 15 0:00 0 S
|
|
Rule Halifax 1925 only - Sep 28 0:00 0 S
|
|
Rule Halifax 1926 only - May 16 0:00 1:00 D
|
|
Rule Halifax 1926 only - Sep 13 0:00 0 S
|
|
Rule Halifax 1927 only - May 1 0:00 1:00 D
|
|
Rule Halifax 1927 only - Sep 26 0:00 0 S
|
|
Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
|
|
Rule Halifax 1928 only - Sep 9 0:00 0 S
|
|
Rule Halifax 1929 only - Sep 3 0:00 0 S
|
|
Rule Halifax 1930 only - Sep 15 0:00 0 S
|
|
Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
|
|
Rule Halifax 1933 only - Apr 30 0:00 1:00 D
|
|
Rule Halifax 1933 only - Oct 2 0:00 0 S
|
|
Rule Halifax 1934 only - May 20 0:00 1:00 D
|
|
Rule Halifax 1934 only - Sep 16 0:00 0 S
|
|
Rule Halifax 1935 only - Jun 2 0:00 1:00 D
|
|
Rule Halifax 1935 only - Sep 30 0:00 0 S
|
|
Rule Halifax 1936 only - Jun 1 0:00 1:00 D
|
|
Rule Halifax 1936 only - Sep 14 0:00 0 S
|
|
Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
|
|
Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
|
|
Rule Halifax 1939 only - May 28 0:00 1:00 D
|
|
Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
|
|
Rule Halifax 1942 only - Feb 9 2:00 1:00 D
|
|
Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S
|
|
Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D
|
|
Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Halifax 1962 max - Oct lastSun 2:00 0 S
|
|
Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
|
|
-4:00 Halifax A%sT
|
|
Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
|
|
-4:00 Canada A%sT 1953
|
|
-4:00 Halifax A%sT 1954
|
|
-4:00 - AST 1972
|
|
-4:00 Halifax A%sT
|
|
|
|
|
|
# Ontario, Quebec
|
|
|
|
# From Paul Eggert (1996-06-12):
|
|
# Shanks writes that since 1970 most of this region has been like Montreal.
|
|
# Thunder Bay skipped DST in 1973.
|
|
# Many smaller locales did not observe peacetime DST until 1974;
|
|
# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
|
|
# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
|
|
|
|
# From Paul Eggert (1997-10-17):
|
|
# msb@sq.com writes that an article in the 1997-10-14 Toronto Star
|
|
# says that Atikokan, Ontario currently does not observe DST,
|
|
# but will vote on 11-10 whether to use EST/EDT.
|
|
# He also writes that the
|
|
# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
|
|
# Ontario Time Act (1990, Chapter T.9)
|
|
# </a>
|
|
# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
|
|
# Officially Atikokan is therefore on CST/CDT, and most likely this report
|
|
# concerns a non-official time observed as a matter of local practice.
|
|
# For what it's worth, Shanks says that Atikokan has agreed with
|
|
# Rainy River ever since standard time was introduced.
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
|
|
# New Osnaburgh observe CST all year, that Big Trout Lake observes
|
|
# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
|
|
# violation of the official Ontario rules.
|
|
# They also write that Quebec east of the -63 meridian is supposed to
|
|
# observe AST, but residents as far east as Natashquan use EST/EDT,
|
|
# and residents east of Natashquan use AST.
|
|
# We probably need Zones for far east Quebec and for Atikokan,
|
|
# but we don't know when their practices started.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Mont 1917 only - Mar 25 2:00 1:00 D
|
|
Rule Mont 1917 only - Apr 24 0:00 0 S
|
|
Rule Mont 1918 only - Apr 14 2:00 1:00 D
|
|
Rule Mont 1918 only - Oct 31 2:00 0 S
|
|
Rule Mont 1919 only - Mar 31 2:30 1:00 D
|
|
Rule Mont 1919 only - Oct 25 2:30 0 S
|
|
Rule Mont 1920 only - May 2 2:30 1:00 D
|
|
Rule Mont 1920 only - Oct 3 2:30 0 S
|
|
Rule Mont 1921 only - May 1 2:00 1:00 D
|
|
Rule Mont 1921 only - Oct 2 2:30 0 S
|
|
Rule Mont 1922 only - Apr 30 2:00 1:00 D
|
|
Rule Mont 1922 only - Oct 1 2:30 0 S
|
|
Rule Mont 1924 only - May 17 2:00 1:00 D
|
|
Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
|
|
Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
|
|
Rule Mont 1927 only - May 1 0:00 1:00 D
|
|
Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S
|
|
Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D
|
|
Rule Mont 1932 only - May 1 0:00 1:00 D
|
|
Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D
|
|
Rule Mont 1933 only - Oct 1 0:00 0 S
|
|
Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S
|
|
Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
|
|
Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
|
|
Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
|
|
Rule Mont 1957 max - Oct lastSun 2:00 0 S
|
|
Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Montreal -4:54:16 - LMT 1884
|
|
-5:00 Mont E%sT
|
|
Zone America/Thunder_Bay -5:57:00 - LMT 1895
|
|
-5:00 Canada E%sT 1970
|
|
-5:00 Mont E%sT 1973
|
|
-5:00 - EST 1974
|
|
-5:00 Canada E%sT
|
|
Zone America/Nipigon -5:53:04 - LMT 1895
|
|
-5:00 Canada E%sT
|
|
Zone America/Rainy_River -6:17:56 - LMT 1895
|
|
-6:00 Canada C%sT
|
|
|
|
|
|
# Manitoba
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Winn 1916 only - Apr 23 0:00 1:00 D
|
|
Rule Winn 1916 only - Sep 17 0:00 0 S
|
|
Rule Winn 1918 only - Apr 14 2:00 1:00 D
|
|
Rule Winn 1918 only - Oct 31 2:00 0 S
|
|
Rule Winn 1937 only - May 16 2:00 1:00 D
|
|
Rule Winn 1937 only - Sep 26 2:00 0 S
|
|
Rule Winn 1942 only - Feb 9 2:00 1:00 D
|
|
Rule Winn 1945 only - Sep lastSun 2:00 0 S
|
|
Rule Winn 1946 only - May 12 2:00 1:00 D
|
|
Rule Winn 1946 only - Oct 13 2:00 0 S
|
|
Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
|
|
Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
|
|
Rule Winn 1950 only - May 1 2:00 1:00 D
|
|
Rule Winn 1950 only - Sep 30 2:00 0 S
|
|
Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
|
|
Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
|
|
Rule Winn 1959 only - Oct lastSun 2:00 0 S
|
|
Rule Winn 1960 only - Sep lastSun 2:00 0 S
|
|
Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
|
|
Rule Winn 1963 only - Sep 22 2:00 0 S
|
|
Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Winn 1966 1986 - Oct lastSun 2:00 0 S
|
|
Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# From Paul Eggert (2000-10-02):
|
|
# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
|
|
# DST at 03:00 local time. For now, assume it started in 1987.
|
|
Rule Winn 1987 max - Oct lastSun 2:00s 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
|
|
-6:00 Winn C%sT
|
|
|
|
|
|
# Saskatchewan
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# Shanks writes that since 1970 most of this region has been like Regina.
|
|
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
|
|
# Other western towns (e.g. Lloydminster) are like Edmonton.
|
|
# Matthews and Vincent (1998) write that Denare Beach and Creighton
|
|
# are like Winnipeg, in violation of Saskatchewan law.
|
|
|
|
# From W. Jones <jones@skdad.usask.ca> (1992-11-06):
|
|
# The. . .below is based on information I got from our law library, the
|
|
# provincial archives, and the provincial Community Services department.
|
|
# A precise history would require digging through newspaper archives, and
|
|
# since you didn't say what you wanted, I didn't bother.
|
|
#
|
|
# Saskatchewan is split by a time zone meridian (105W) and over the years
|
|
# the boundary became pretty ragged as communities near it reevaluated
|
|
# their affiliations in one direction or the other. In 1965 a provincial
|
|
# referendum favoured legislating common time practices.
|
|
#
|
|
# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
|
|
# Saskatchewan 1978) was proclaimed, and established that the eastern
|
|
# part of Saskatchewan would use CST year round, that districts in
|
|
# northwest Saskatchewan would by default follow CST but could opt to
|
|
# follow Mountain Time rules (thus 1 hour difference in the winter and
|
|
# zero in the summer), and that districts in southwest Saskatchewan would
|
|
# by default follow MT but could opt to follow CST.
|
|
#
|
|
# It took a few years for the dust to settle (I know one story of a town
|
|
# on one time zone having its school in another, such that a mom had to
|
|
# serve her family lunch in two shifts), but presently it seems that only
|
|
# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
|
|
# rules any more; all other districts appear to have used CST year round
|
|
# since sometime in the 1960s.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Regina 1918 only - Apr 14 2:00 1:00 D
|
|
Rule Regina 1918 only - Oct 31 2:00 0 S
|
|
Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
|
|
Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
|
|
Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
|
|
Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
|
|
Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
|
|
Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
|
|
Rule Regina 1942 only - Feb 9 2:00 1:00 D
|
|
Rule Regina 1945 only - Sep lastSun 2:00 0 S
|
|
Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
|
|
Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
|
|
Rule Regina 1947 1959 - Apr lastSun 2:00 1:00 D
|
|
Rule Regina 1947 1958 - Sep lastSun 2:00 0 S
|
|
Rule Regina 1959 only - Oct lastSun 2:00 0 S
|
|
#
|
|
Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
|
|
Rule Swift 1957 only - Oct lastSun 2:00 0 S
|
|
Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
|
|
Rule Swift 1959 only - Oct lastSun 2:00 0 S
|
|
Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Regina -6:58:36 - LMT 1905 Sep
|
|
-7:00 Regina M%sT 1960 Apr lastSun 2:00
|
|
-6:00 - CST
|
|
Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
|
|
-7:00 Canada M%sT 1946 Apr lastSun 2:00
|
|
-7:00 Regina M%sT 1950
|
|
-7:00 Swift M%sT 1972 Apr lastSun 2:00
|
|
-6:00 - CST
|
|
|
|
|
|
# Alberta
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
|
|
Rule Edm 1918 only - Oct 31 2:00 0 S
|
|
Rule Edm 1919 only - May 27 2:00 0 S
|
|
Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
|
|
Rule Edm 1920 only - Oct lastSun 2:00 0 S
|
|
Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
|
|
Rule Edm 1942 only - Feb 9 2:00 1:00 D
|
|
Rule Edm 1945 only - Sep lastSun 2:00 0 S
|
|
Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
|
|
Rule Edm 1947 only - Sep lastSun 2:00 0 S
|
|
Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
|
|
Rule Edm 1967 only - Oct lastSun 2:00 0 S
|
|
Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
|
|
Rule Edm 1969 only - Oct lastSun 2:00 0 S
|
|
Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Edm 1972 max - Oct lastSun 2:00 0 S
|
|
Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Edmonton -7:33:52 - LMT 1906 Sep
|
|
-7:00 Edm M%sT
|
|
|
|
|
|
# British Columbia
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# Shanks writes that since 1970 most of this region has been like Vancouver.
|
|
# Dawson Creek uses MST. Much of east BC is like Edmonton.
|
|
# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Vanc 1918 only - Apr 14 2:00 1:00 D
|
|
Rule Vanc 1918 only - Oct 31 2:00 0 S
|
|
Rule Vanc 1942 only - Feb 9 2:00 1:00 D
|
|
Rule Vanc 1945 only - Sep 30 2:00 0 S
|
|
Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Vanc 1946 only - Oct 13 2:00 0 S
|
|
Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
|
|
Rule Vanc 1962 max - Oct lastSun 2:00 0 S
|
|
Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Vancouver -8:12:28 - LMT 1884
|
|
-8:00 Vanc P%sT
|
|
Zone America/Dawson_Creek -8:00:56 - LMT 1884
|
|
-8:00 Canada P%sT 1947
|
|
-8:00 Vanc P%sT 1972 Aug 30 2:00
|
|
-7:00 - MST
|
|
|
|
|
|
# Northwest Territories, Nunavut, Yukon
|
|
|
|
# From Paul Eggert (1999-10-29):
|
|
# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
|
|
# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs:
|
|
# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
|
|
# c. 7 defines Yukon standard time as UTC-9. This is still valid;
|
|
# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
|
|
# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
|
|
# * O.I.C. 1980/02 established DST.
|
|
# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
|
|
# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
|
|
|
|
# From Rives McDow (1999-09-04):
|
|
# Nunavut ... moved ... to incorporate the whole territory into one time zone.
|
|
# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
|
|
# Nunavut moves to single time zone Oct. 31
|
|
# </a>
|
|
#
|
|
# From Antoine Leca (1999-09-06):
|
|
# We then need to create a new timezone for the Kitikmeot region of Nunavut
|
|
# to differentiate it from the Yellowknife region.
|
|
|
|
# From Paul Eggert (1999-09-20):
|
|
# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
|
|
# Basic Facts: The New Territory
|
|
# </a> (1999) reports that Pangnirtung operates on Eastern time,
|
|
# and that Coral Harbour does not observe DST. We don't know when
|
|
# Pangnirtung switched to Eastern time; we'll guess 1995.
|
|
# We'll ignore the claim about Coral Harbour for now,
|
|
# since we have no further info.
|
|
|
|
# From Rives McDow (1999-11-08):
|
|
# On October 31, when the rest of Nunavut went to Central time,
|
|
# Pangnirtung wobbled. Here is the result of their wobble:
|
|
#
|
|
# The following businesses and organizations in Pangnirtung use Central Time:
|
|
#
|
|
# First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
|
|
# Eastern Arctic National Parks, A & D Specialist
|
|
#
|
|
# The following businesses and organizations in Pangnirtung use Eastern Time:
|
|
#
|
|
# Hamlet office, All other businesses, Both schools, Airport operator
|
|
#
|
|
# This has made for an interesting situation there, which warranted the news.
|
|
# No one there that I spoke with seems concerned, or has plans to
|
|
# change the local methods of keeping time, as it evidently does not
|
|
# really interfere with any activities or make things difficult locally.
|
|
# They plan to celebrate New Year's turn-over twice, one hour apart,
|
|
# so it appears that the situation will last at least that long.
|
|
# The Nunavut Intergovernmental Affairs hopes that they will "come to
|
|
# their senses", but the locals evidently don't see any problem with
|
|
# the current state of affairs.
|
|
|
|
# From Michaela Rodrigue, writing in the
|
|
# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
|
|
# Nunatsiaq News (1999-11-19)</a>:
|
|
# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
|
|
# central - or Nunavut time - for government offices, and eastern time
|
|
# for municipal offices and schools.... Igloolik [was similar but then]
|
|
# made the switch to central time on Saturday, Nov. 6.
|
|
|
|
# From Paul Eggert (2000-10-02):
|
|
# Matthews and Vincent (1998) say the following, but we lack histories
|
|
# for these potential new Zones.
|
|
#
|
|
# The Canadian Forces station at Alert uses Eastern Time while the
|
|
# handful of residents at the Eureka weather station [in the Central
|
|
# zone] skip daylight savings. Baffin Island, which is crossed by the
|
|
# Central, Eastern and Atlantic Time zones only uses Eastern Time.
|
|
# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
|
|
# Central Time and Southampton Island [in the Central zone] is not
|
|
# required to use daylight savings.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
|
|
Rule NT_YK 1918 only - Oct 27 2:00 0 S
|
|
Rule NT_YK 1919 only - May 25 2:00 1:00 D
|
|
Rule NT_YK 1919 only - Nov 1 0:00 0 S
|
|
Rule NT_YK 1942 only - Feb 9 2:00 1:00 D
|
|
Rule NT_YK 1945 only - Sep 30 2:00 0 S
|
|
Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
|
|
Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
|
|
Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule NT_YK 1980 max - Oct lastSun 2:00 0 S
|
|
Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Pangnirtung -4:22:56 - LMT 1884
|
|
-4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
|
|
-5:00 Canada E%sT 1999 Oct 31 2:00
|
|
-6:00 Canada C%sT
|
|
Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987
|
|
-5:00 NT_YK E%sT 1999 Oct 31 2:00
|
|
-6:00 Canada C%sT
|
|
Zone America/Rankin_Inlet -6:08:40 - LMT 1884
|
|
-6:00 NT_YK C%sT
|
|
Zone America/Cambridge_Bay -7:00:20 - LMT 1884
|
|
-7:00 NT_YK M%sT 1999 Oct 31 2:00
|
|
-6:00 Canada C%sT
|
|
Zone America/Yellowknife -7:37:24 - LMT 1884
|
|
-7:00 NT_YK M%sT
|
|
Zone America/Inuvik -8:54:00 - LMT 1884
|
|
-8:00 NT_YK P%sT 1979 Apr lastSun 2:00
|
|
-7:00 NT_YK M%sT
|
|
Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
|
|
-9:00 NT_YK Y%sT 1966 Jul 1 2:00
|
|
-8:00 NT_YK P%sT
|
|
Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
|
|
-9:00 NT_YK Y%sT 1973 Oct 28 0:00
|
|
-8:00 NT_YK P%sT
|
|
|
|
|
|
###############################################################################
|
|
|
|
# Mexico
|
|
|
|
# Gwillim Law reports this source for daylight saving time in Mexico:
|
|
# <a href="http://www.spin.com.mx/verano/">
|
|
# Daylight saving time * SPIN-Internet (in Spanish)
|
|
# </a>
|
|
# Law (2000-03-09) translates it as follows:
|
|
#
|
|
# Standard time effective in Mexico takes its origin in the
|
|
# presidential decree of April 24, 1942. The time of the 120th
|
|
# meridian applies to the state of Baja California; of the 105th
|
|
# meridian to the states of Baja California Sur, Sonora, Sinaloa, and
|
|
# Nayarit; and the time of the 90th meridian to the rest of the
|
|
# country.
|
|
#
|
|
# In the country, there have been several attempts made to adapt
|
|
# standard time with the object of arriving at a better use of
|
|
# daylight for social and economic activities. In December, 1981 a
|
|
# permanent time zone was decreed for the states of Campeche, Yucatan,
|
|
# and Quintana Roo, displacing them from the 90th to the 75th
|
|
# meridian. This disposition was annulled on December 2, 1982.
|
|
#
|
|
# In 1988 a Summer Time was established for the states of Tamaulipas,
|
|
# Nuevo Leon, Coahuila, and Durango, which meant that from the first
|
|
# Sunday in April to the last [Sunday] of October those states
|
|
# displaced their time from the 90th to the 75th meridian. That
|
|
# disposition lasted for one year.
|
|
|
|
# From Paul Eggert (2000-07-26):
|
|
# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
|
|
# and 1988 DST experiments. Go with spin.com.mx.
|
|
|
|
# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15):
|
|
# A guy from our Mexico subsidiary finally found the Presidential Decree
|
|
# outlining the timezone changes in Mexico.
|
|
#
|
|
# ------------- Begin Forwarded Message -------------
|
|
#
|
|
# I finally got my hands on the Official Presidential Decree that sets up the
|
|
# rules for the DST changes. The rules are:
|
|
#
|
|
# 1. The country is divided in 3 timezones:
|
|
# - Baja California Norte (the Mexico/BajaNorte TZ)
|
|
# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
|
|
# - The rest of the country (the Mexico/General TZ)
|
|
#
|
|
# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
|
|
# at 2:00 AM, the times in each zone are as follows:
|
|
# BajaNorte: GMT+7
|
|
# BajaSur: GMT+6
|
|
# General: GMT+5
|
|
#
|
|
# 3. The rest of the year, the times are as follows:
|
|
# BajaNorte: GMT+8
|
|
# BajaSur: GMT+7
|
|
# General: GMT+6
|
|
#
|
|
# The Decree was published in Mexico's Official Newspaper on January 4th.
|
|
#
|
|
# -------------- End Forwarded Message --------------
|
|
# From Paul Eggert (1996-06-12):
|
|
# For an English translation of the decree, see
|
|
# <a href="http://mexico-travel.com/extra/timezone_eng.html">
|
|
# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
|
|
# </a>
|
|
|
|
# From Rives McDow (1998-10-08):
|
|
# The State of Quintana Roo has reverted back to central STD and DST times
|
|
# (i.e. UTC -0600 and -0500 as of 1998-08-02).
|
|
|
|
# From Rives McDow (2000-01-10):
|
|
# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
|
|
# zone 5 hours from the International Date Line, and will not observe daylight
|
|
# savings time so as to stay on the same time zone as the southern part of
|
|
# Arizona year round.
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Mexico 1939 only - Feb 5 0:00 1:00 D
|
|
Rule Mexico 1939 only - Jun 25 0:00 0 S
|
|
Rule Mexico 1940 only - Dec 9 0:00 1:00 D
|
|
Rule Mexico 1941 only - Apr 1 0:00 0 S
|
|
Rule Mexico 1943 only - Dec 16 0:00 1:00 D
|
|
Rule Mexico 1944 only - May 1 0:00 0 S
|
|
Rule Mexico 1950 only - Feb 12 0:00 1:00 D
|
|
Rule Mexico 1950 only - Jul 30 0:00 0 S
|
|
Rule Mexico 1996 max - Apr Sun>=1 2:00 1:00 D
|
|
Rule Mexico 1996 max - Oct lastSun 2:00 0 S
|
|
#
|
|
Rule BajaN 1954 1961 - Apr lastSun 2:00 1:00 D
|
|
Rule BajaN 1954 1961 - Sep lastSun 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
# Quintana Roo
|
|
Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
|
|
-6:00 - CST 1981 Dec
|
|
-5:00 - EST 1982 Dec 2
|
|
-6:00 - CST 1996
|
|
-6:00 Mexico C%sT 1997 Oct lastSun 2:00
|
|
-5:00 Mexico E%sT 1998 Aug 2 2:00
|
|
-6:00 Mexico C%sT
|
|
# Campeche, Yucatan
|
|
Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
|
|
-6:00 - CST 1981 Dec
|
|
-5:00 - EST 1982 Dec 2
|
|
-6:00 Mexico C%sT
|
|
# Coahuila, Durango, Nuevo Leon, Tamaulipas
|
|
Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 0:01:32
|
|
-6:00 - CST 1988
|
|
-6:00 US C%sT 1989
|
|
-6:00 Mexico C%sT
|
|
# Central Mexico
|
|
Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
|
|
-7:00 - MST 1927 Jun 10 23:00
|
|
-6:00 - CST 1930 Nov 15
|
|
-7:00 - MST 1931 May 1 23:00
|
|
-6:00 - CST 1931 Oct
|
|
-7:00 - MST 1932 Mar 30 23:00
|
|
-6:00 Mexico C%sT
|
|
# Chihuahua
|
|
Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
|
|
-7:00 - MST 1927 Jun 10 23:00
|
|
-6:00 - CST 1930 Nov 15
|
|
-7:00 - MST 1931 May 1 23:00
|
|
-6:00 - CST 1931 Oct
|
|
-7:00 - MST 1932 Mar 30 23:00
|
|
-6:00 - CST 1996
|
|
-6:00 Mexico C%sT 1998
|
|
-6:00 - CST 1998 Apr Sun>=1 3:00
|
|
-7:00 Mexico M%sT
|
|
# Sonora
|
|
Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
|
|
-7:00 - MST 1927 Jun 10 23:00
|
|
-6:00 - CST 1930 Nov 15
|
|
-7:00 - MST 1931 May 1 23:00
|
|
-6:00 - CST 1931 Oct
|
|
-7:00 - MST 1932 Mar 30 23:00
|
|
-6:00 - CST 1942 Apr 24
|
|
-7:00 - MST 1949 Jan 14
|
|
-8:00 - PST 1970
|
|
-7:00 Mexico M%sT 1999
|
|
-7:00 - MST
|
|
# Baja California Sur, Nayarit, Sinaloa
|
|
Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
|
|
-7:00 - MST 1927 Jun 10 23:00
|
|
-6:00 - CST 1930 Nov 15
|
|
-7:00 - MST 1931 May 1 23:00
|
|
-6:00 - CST 1931 Oct
|
|
-7:00 - MST 1932 Mar 30 23:00
|
|
-6:00 - CST 1942 Apr 24
|
|
-7:00 - MST 1949 Jan 14
|
|
-8:00 - PST 1970
|
|
-7:00 Mexico M%sT
|
|
# Baja California
|
|
Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
|
|
-8:00 - PST 1927 Jun 10 23:00
|
|
-7:00 - MST 1930 Nov 16
|
|
-8:00 - PST 1942 Apr 24
|
|
-7:00 - MST 1949 Jan 14
|
|
-8:00 BajaN P%sT 1976
|
|
-8:00 US P%sT 1996
|
|
-8:00 Mexico P%sT
|
|
#
|
|
# Revillagigedo Is
|
|
# no information
|
|
|
|
###############################################################################
|
|
|
|
# Anguilla
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
|
|
-4:00 - AST
|
|
|
|
# Antigua and Barbuda
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
|
|
-5:00 - EST 1951
|
|
-4:00 - AST
|
|
|
|
# Bahamas
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Bahamas 1964 max - Oct lastSun 2:00 0 S
|
|
Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D
|
|
Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
|
|
-5:00 Bahamas E%sT
|
|
|
|
# Barbados
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Barb 1977 only - Jun 12 2:00 1:00 D
|
|
Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
|
|
Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
|
|
Rule Barb 1979 only - Sep 30 2:00 0 S
|
|
Rule Barb 1980 only - Sep 25 2:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
|
|
-3:58:28 - BMT 1932 # Bridgetown Mean Time
|
|
-4:00 Barb A%sT
|
|
|
|
# Belize
|
|
# Whitman entirely disagrees with Shanks; go with Shanks.
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
|
|
Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
|
|
Rule Belize 1973 only - Dec 5 0:00 1:00 D
|
|
Rule Belize 1974 only - Feb 9 0:00 0 S
|
|
Rule Belize 1982 only - Dec 18 0:00 1:00 D
|
|
Rule Belize 1983 only - Feb 12 0:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Belize -5:52:48 - LMT 1912 Apr
|
|
-6:00 Belize C%sT
|
|
|
|
# Bermuda
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
|
|
-4:00 - AST 1974 Apr 28 2:00
|
|
-4:00 Bahamas A%sT
|
|
|
|
# Cayman Is
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
|
|
-5:07:12 - KMT 1912 Feb # Kingston Mean Time
|
|
-5:00 - EST
|
|
|
|
# Costa Rica
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
|
|
Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
|
|
Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
|
|
# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
|
|
Rule CR 1991 only - Jul 1 0:00 0 S
|
|
Rule CR 1992 only - Mar 15 0:00 0 S
|
|
# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
|
|
-5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time
|
|
-6:00 CR C%sT
|
|
# Coco
|
|
# no information; probably like America/Costa_Rica
|
|
|
|
# Cuba
|
|
|
|
# From Arthur David Olson (1999-03-29):
|
|
# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
|
|
# the Cuban National Team and the Baltimore Orioles was carried live on
|
|
# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
|
|
# During the game, play-by-play announcer Jim Hunter noted that
|
|
# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
|
|
# Time today." (The "two hour" remark referred to losing one hour of
|
|
# sleep on 1999-03-28--when the announcers were in Cuba as it switched
|
|
# to DST--and one more hour on 1999-04-04--when the announcers will have
|
|
# returned to Baltimore, which switches on that date.)
|
|
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Cuba 1928 only - Jun 10 0:00 1:00 D
|
|
Rule Cuba 1928 only - Oct 10 0:00 0 S
|
|
Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
|
|
Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
|
|
Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
|
|
Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
|
|
Rule Cuba 1965 only - Jun 1 0:00 1:00 D
|
|
Rule Cuba 1965 only - Sep 30 0:00 0 S
|
|
Rule Cuba 1966 only - May 29 0:00 1:00 D
|
|
Rule Cuba 1966 only - Oct 2 0:00 0 S
|
|
Rule Cuba 1967 only - Apr 8 0:00 1:00 D
|
|
Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
|
|
Rule Cuba 1968 only - Apr 14 0:00 1:00 D
|
|
Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
|
|
Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
|
|
Rule Cuba 1972 1974 - Oct 8 0:00 0 S
|
|
Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
|
|
Rule Cuba 1978 only - May 7 0:00 1:00 D
|
|
Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
|
|
Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
|
|
Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
|
|
Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
|
|
Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
|
|
Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
|
|
Rule Cuba 1996 only - Oct 6 0:00s 0 S
|
|
Rule Cuba 1997 only - Oct 12 0:00s 0 S
|
|
Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
|
|
Rule Cuba 1998 max - Oct lastSun 0:00s 0 S
|
|
Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D
|
|
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Havana -5:29:28 - LMT 1890
|
|
-5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
|
|
-5:00 Cuba C%sT
|
|
|
|
# Dominica
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
|
|
-4:00 - AST
|
|
|
|
# Dominican Republic
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule DR 1966 only - Oct 30 0:00 1:00 D
|
|
Rule DR 1967 only - Feb 28 0:00 0 S
|
|
Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
|
|
Rule DR 1970 only - Feb 21 0:00 0 S
|
|
Rule DR 1971 only - Jan 20 0:00 0 S
|
|
Rule DR 1972 1974 - Jan 21 0:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Santo_Domingo -4:39:36 - LMT 1890
|
|
-4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
|
|
-5:00 DR E%sT 1974 Oct 27
|
|
-4:00 - AST
|
|
|
|
# El Salvador
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
|
|
Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
|
|
# There are too many San Salvadors elsewhere, so we'll use `El Salvador'.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
|
|
-6:00 Salv C%sT
|
|
|
|
# Grenada
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
|
|
-4:00 - AST
|
|
|
|
# Guadeloupe
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
|
|
-4:00 - AST
|
|
|
|
# Guatemala
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Guat 1973 only - Nov 25 0:00 1:00 D
|
|
Rule Guat 1974 only - Feb 24 0:00 0 S
|
|
Rule Guat 1983 only - May 21 0:00 1:00 D
|
|
Rule Guat 1983 only - Sep 22 0:00 0 S
|
|
Rule Guat 1991 only - Mar 23 0:00 1:00 D
|
|
Rule Guat 1991 only - Sep 7 0:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
|
|
-6:00 Guat C%sT
|
|
|
|
# Haiti
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Haiti 1983 only - May 8 0:00 1:00 D
|
|
Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
|
|
Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
|
|
# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA.
|
|
Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
|
|
Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Port-au-Prince -4:49:20 - LMT 1890
|
|
-4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
|
|
-5:00 Haiti E%sT
|
|
|
|
# Honduras
|
|
# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
|
|
-6:00 Salv C%sT
|
|
#
|
|
# Great Swan I ceded by US to Honduras in 1972
|
|
|
|
# Jamaica
|
|
|
|
# From Bob Devine (1988-01-28):
|
|
# Follows US rules.
|
|
|
|
# From U. S. Naval Observatory (1989-01-19):
|
|
# JAMAICA 5 H BEHIND UTC
|
|
|
|
# From Shanks:
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
|
|
-5:07:12 - KMT 1912 Feb # Kingston Mean Time
|
|
-5:00 - EST 1974 Apr 28 2:00
|
|
-5:00 US E%sT 1984
|
|
-5:00 - EST
|
|
|
|
# Martinique
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
|
|
-4:04 - FFMT 1911 May # Fort-de-France MT
|
|
-4:00 - AST 1980 Apr 6
|
|
-4:00 1:00 ADT 1980 Sep 28
|
|
-4:00 - AST
|
|
|
|
# Montserrat
|
|
# From Paul Eggert (1997-08-31):
|
|
# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
|
|
# Luckily, Olveston, the current de facto capital, has the same longitude.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
|
|
-4:00 - AST
|
|
|
|
# Nicaragua
|
|
#
|
|
# From Steffen Thorsen (1998-12-29):
|
|
# Nicaragua seems to be back at -6:00 but I have not been able to find when
|
|
# they changed from -5:00.
|
|
#
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
|
|
Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
|
|
Rule Nic 1992 only - Jan 1 4:00 1:00 D
|
|
Rule Nic 1992 only - Sep 24 0:00 0 S
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Managua -5:45:08 - LMT 1890
|
|
-5:45 - MMT 1934 Jun 23 # Managua Mean Time
|
|
-6:00 - CST 1973 May
|
|
-5:00 - EST 1975 Feb 16
|
|
-6:00 Nic C%sT 1993 Jan 1 4:00
|
|
-5:00 - EST 1998 Dec
|
|
-6:00 - CST
|
|
|
|
# Panama
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Panama -5:18:08 - LMT 1890
|
|
-5:20 - PMT 1908 Apr 22 # Panama Mean Time
|
|
-5:00 - EST
|
|
|
|
# Puerto Rico
|
|
# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
|
|
-4:00 - AST 1942 May 3
|
|
-4:00 1:00 AWT 1945 Sep 30 2:00
|
|
-4:00 - AST
|
|
|
|
# St Kitts-Nevis
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
|
|
-4:00 - AST
|
|
|
|
# St Lucia
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
|
|
-4:04 - CMT 1912 # Castries Mean Time
|
|
-4:00 - AST
|
|
|
|
# St Pierre and Miquelon
|
|
# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
|
|
-4:00 - AST 1980 May
|
|
-3:00 Mont PM%sT # Pierre & Miquelon Time
|
|
|
|
# St Vincent and the Grenadines
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
|
|
-4:04:56 - KMT 1912 # Kingstown Mean Time
|
|
-4:00 - AST
|
|
|
|
# Turks and Caicos
|
|
# From Paul Eggert (1998-08-06):
|
|
# Shanks says they use US DST rules, but IATA SSIM (1991/1998)
|
|
# says they switch at midnight. Go with IATA SSIM.
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
|
|
Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D
|
|
Rule TC 1979 max - Oct lastSun 0:00 0 S
|
|
Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Grand_Turk -4:44:32 - LMT 1890
|
|
-5:07:12 - KMT 1912 Feb # Kingston Mean Time
|
|
-5:00 TC E%sT
|
|
|
|
# British Virgin Is
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
|
|
-4:00 - AST
|
|
|
|
# Virgin Is
|
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
|
|
Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
|
|
-4:00 - AST
|