53 lines
2.4 KiB
Plaintext
53 lines
2.4 KiB
Plaintext
README for the tz distribution
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"Where do I set the hands of the clock?" -- Les Tremayne as The King
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"Oh that--you can set them any place you want." -- Frank Baxter as The Scientist
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(from the Bell System film "About Time")
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The Time Zone Database (called tz, tzdb 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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See <https://www.iana.org/time-zones/repository/tz-link.html> or the
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file tz-link.html for how to acquire the code and data. Once acquired,
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read the comments in the file '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/usr/bin/zdump -v America/Los_Angeles
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See the file tz-how-to.html for examples of how to read the data files.
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This database of historical local time information has several goals:
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* Provide a compendium of data about the history of civil time that
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is useful even if not 100% accurate.
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* Give an idea of the variety of local time rules that have existed
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in the past and thus may be expected in the future.
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* Test the generality of the local time rule description 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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-----
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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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