11.7SchristosREADME for the tz distribution 21.7Schristos 31.15Schristos"Where do I set the hands of the clock?" -- Les Tremayne as The King 41.15Schristos"Oh that--you can set them any place you want." -- Frank Baxter as The Scientist 51.4Sjtc (from the Bell System film "About Time") 61.4Sjtc 71.14SchristosThe Time Zone Database (called tz, tzdb or zoneinfo) contains code and 81.8Schristosdata that represent the history of local time for many representative 91.8Schristoslocations around the globe. It is updated periodically to reflect 101.8Schristoschanges made by political bodies to time zone boundaries, UTC offsets, 111.8Schristosand daylight-saving rules. 121.8Schristos 131.12SchristosSee <https://www.iana.org/time-zones/repository/tz-link.html> or the 141.17Schristosfile tz-link.html for how to acquire the code and data. 151.5Skleink 161.17SchristosOnce acquired, read the leading comments in the file "Makefile" 171.17Schristosand make any changes needed to make things right for your system, 181.17Schristosespecially when using a platform other than current GNU/Linux. 191.17Schristos 201.17SchristosThen run the following commands, substituting your desired 211.17Schristosinstallation directory for "$HOME/tzdir": 221.17Schristos 231.17Schristos make TOPDIR="$HOME/tzdir" install 241.17Schristos "$HOME/tzdir/usr/bin/zdump" -v America/Los_Angeles 251.4Sjtc 261.16SchristosSee the file tz-how-to.html for examples of how to read the data files. 271.16Schristos 281.14SchristosThis database of historical local time information has several goals: 291.6Smlelstv 301.14Schristos * Provide a compendium of data about the history of civil time that 311.14Schristos is useful even if not 100% accurate. 321.4Sjtc 331.14Schristos * Give an idea of the variety of local time rules that have existed 341.14Schristos in the past and thus may be expected in the future. 351.4Sjtc 361.14Schristos * Test the generality of the local time rule description system. 371.4Sjtc 381.4SjtcThe information in the time zone data files is by no means authoritative; 391.9Schristosfixes and enhancements are welcome. Please see the file CONTRIBUTING 401.9Schristosfor details. 411.4Sjtc 421.9SchristosThanks to these Time Zone Caballeros who've made major contributions to the 431.9Schristostime conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz; 441.4SjtcGuy Harris; Mark Horton; John Mackin; and Bradley White. Thanks also to 451.4SjtcMichael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales 461.4Sjtcfor testing work, and to Gwillim Law for checking local mean time data. 471.8SchristosThanks in particular to Arthur David Olson, the project's founder and first 481.9Schristosmaintainer, to whom the time zone community owes the greatest debt of all. 491.4SjtcNone of them are responsible for remaining errors. 501.4Sjtc 511.10Schristos----- 521.10Schristos 531.10SchristosThis file is in the public domain, so clarified as of 2009-05-17 by 541.10SchristosArthur David Olson. The other files in this distribution are either 551.10Schristospublic domain or BSD licensed; see the file LICENSE for details. 56