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1.7       christos    1: README for the tz distribution
1.4       jtc         3: "What time is it?" -- Richard Deacon as The King
                      4: "Any time you want it to be." -- Frank Baxter as The Scientist
                      5:                                        (from the Bell System film "About Time")
                      6:! pgoyette    7: The Time Zone Database (called tz, tzdb or zoneinfo) contains code and
1.8       christos    8: data that represent the history of local time for many representative
                      9: locations around the globe.  It is updated periodically to reflect
                     10: changes made by political bodies to time zone boundaries, UTC offsets,
                     11: and daylight-saving rules.
1.12      christos   13: See <https://www.iana.org/time-zones/repository/tz-link.html> or the
1.13      christos   14: file tz-link.html for how to acquire the code and data.  Once acquired,
1.12      christos   15: read the comments in the file 'Makefile' and make any changes needed
1.5       kleink     16: to make things right for your system, especially if you are using some
                     17: platform other than GNU/Linux.  Then run the following commands,
                     18: substituting your desired installation directory for "$HOME/tzdir":
                     20:        make TOPDIR=$HOME/tzdir install
1.13      christos   21:        $HOME/tzdir/usr/bin/zdump -v America/Los_Angeles
1.4       jtc        22:! pgoyette   23: This database of historical local time information has several goals:
1.6       mlelstv    24:! pgoyette   25:  * Provide a compendium of data about the history of civil time that
        !            26:    is useful even if not 100% accurate.
1.4       jtc        27:! pgoyette   28:  * Give an idea of the variety of local time rules that have existed
        !            29:    in the past and thus may be expected in the future.
1.4       jtc        30:! pgoyette   31:  * Test the generality of the local time rule description system.
1.4       jtc        32:
                     33: The information in the time zone data files is by no means authoritative;
1.9       christos   34: fixes and enhancements are welcome.  Please see the file CONTRIBUTING
                     35: for details.
1.4       jtc        36:
1.9       christos   37: Thanks to these Time Zone Caballeros who've made major contributions to the
                     38: time conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz;
1.4       jtc        39: Guy Harris; Mark Horton; John Mackin; and Bradley White.  Thanks also to
                     40: Michael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales
                     41: for testing work, and to Gwillim Law for checking local mean time data.
1.8       christos   42: Thanks in particular to Arthur David Olson, the project's founder and first
1.9       christos   43: maintainer, to whom the time zone community owes the greatest debt of all.
1.4       jtc        44: None of them are responsible for remaining errors.
1.10      christos   46: -----
                     48: This file is in the public domain, so clarified as of 2009-05-17 by
                     49: Arthur David Olson.  The other files in this distribution are either
                     50: public domain or BSD licensed; see the file LICENSE for details.

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