72 lines
2.8 KiB
Plaintext
72 lines
2.8 KiB
Plaintext
README for the tz distribution
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"What time is it?" -- Richard Deacon as The King
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"Any time you want it to be." -- Frank Baxter as The Scientist
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(from the Bell System film "About Time")
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The Time Zone Database (often called tz or zoneinfo) contains code and
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data that represent the history of local time for many representative
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locations around the globe. It is updated periodically to reflect
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changes made by political bodies to time zone boundaries, UTC offsets,
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and daylight-saving rules.
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Here is a recipe for acquiring, building, installing, and testing the
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tz distribution on a GNU/Linux or similar host.
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To acquire the distribution, run the following shell commands:
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mkdir tz
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cd tz
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wget --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz'
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gzip -dc tzcode-latest.tar.gz | tar -xf -
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gzip -dc tzdata-latest.tar.gz | tar -xf -
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Alternatively, the following shell commands acquire the same
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distribution, with extra data useful for regression testing:
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wget --retr-symlinks 'ftp://ftp.iana.org/tz/tzdb-latest.tar.lz'
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lzip -dc tzdb-latest.tar.lz | tar -xf -
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Be sure to read the comments in "Makefile" and make any changes needed
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to make things right for your system, especially if you are using some
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platform other than GNU/Linux. Then run the following commands,
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substituting your desired installation directory for "$HOME/tzdir":
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make TOPDIR=$HOME/tzdir install
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$HOME/tzdir/etc/zdump -v America/Los_Angeles
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Historical local time information has been included here to:
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* provide a compendium of data about the history of civil time
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that is useful even if not 100% accurate;
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* give an idea of the variety of local time rules that have
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existed in the past and thus an idea of the variety that may be
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expected in the future;
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* provide a test of the generality of the local time rule description
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system.
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The information in the time zone data files is by no means authoritative;
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fixes and enhancements are welcome. Please see the file CONTRIBUTING
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for details.
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Thanks to these Time Zone Caballeros who've made major contributions to the
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time conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz;
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Guy Harris; Mark Horton; John Mackin; and Bradley White. Thanks also to
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Michael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales
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for testing work, and to Gwillim Law for checking local mean time data.
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Thanks in particular to Arthur David Olson, the project's founder and first
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maintainer, to whom the time zone community owes the greatest debt of all.
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None of them are responsible for remaining errors.
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Look in <ftp://ftp.iana.org/tz/releases/> for updated versions of these files.
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Please send comments or information to tz@iana.org.
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-----
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This file is in the public domain, so clarified as of 2009-05-17 by
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Arthur David Olson. The other files in this distribution are either
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public domain or BSD licensed; see the file LICENSE for details.
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