1ba2b2efdSGlen BarberREADME for the tz distribution 2ba2b2efdSGlen Barber 3ba2b2efdSGlen Barber"What time is it?" -- Richard Deacon as The King 4ba2b2efdSGlen Barber"Any time you want it to be." -- Frank Baxter as The Scientist 5ba2b2efdSGlen Barber (from the Bell System film "About Time") 6ba2b2efdSGlen Barber 7ba2b2efdSGlen BarberThe Time Zone Database (often called tz or zoneinfo) contains code and 8ba2b2efdSGlen Barberdata that represent the history of local time for many representative 9ba2b2efdSGlen Barberlocations around the globe. It is updated periodically to reflect 10ba2b2efdSGlen Barberchanges made by political bodies to time zone boundaries, UTC offsets, 11ba2b2efdSGlen Barberand daylight-saving rules. 12ba2b2efdSGlen Barber 13*e350c46aSBaptiste DaroussinSee <https://www.iana.org/time-zones/repository/tz-link.html> or the 14*e350c46aSBaptiste Daroussinfile tz-link.htm for how to acquire the code and data. Once acquired, 15*e350c46aSBaptiste Daroussinread the comments in the file 'Makefile' and make any changes needed 16ba2b2efdSGlen Barberto make things right for your system, especially if you are using some 17ba2b2efdSGlen Barberplatform other than GNU/Linux. Then run the following commands, 18ba2b2efdSGlen Barbersubstituting your desired installation directory for "$HOME/tzdir": 19ba2b2efdSGlen Barber 20ba2b2efdSGlen Barber make TOPDIR=$HOME/tzdir install 21ba2b2efdSGlen Barber $HOME/tzdir/etc/zdump -v America/Los_Angeles 22ba2b2efdSGlen Barber 23ba2b2efdSGlen BarberHistorical local time information has been included here to: 24ba2b2efdSGlen Barber 25ba2b2efdSGlen Barber* provide a compendium of data about the history of civil time 26ba2b2efdSGlen Barber that is useful even if not 100% accurate; 27ba2b2efdSGlen Barber 28ba2b2efdSGlen Barber* give an idea of the variety of local time rules that have 29ba2b2efdSGlen Barber existed in the past and thus an idea of the variety that may be 30ba2b2efdSGlen Barber expected in the future; 31ba2b2efdSGlen Barber 32ba2b2efdSGlen Barber* provide a test of the generality of the local time rule description 33ba2b2efdSGlen Barber system. 34ba2b2efdSGlen Barber 35ba2b2efdSGlen BarberThe information in the time zone data files is by no means authoritative; 36ba2b2efdSGlen Barberfixes and enhancements are welcome. Please see the file CONTRIBUTING 37ba2b2efdSGlen Barberfor details. 38ba2b2efdSGlen Barber 39ba2b2efdSGlen BarberThanks to these Time Zone Caballeros who've made major contributions to the 40ba2b2efdSGlen Barbertime conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz; 41ba2b2efdSGlen BarberGuy Harris; Mark Horton; John Mackin; and Bradley White. Thanks also to 42ba2b2efdSGlen BarberMichael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales 43ba2b2efdSGlen Barberfor testing work, and to Gwillim Law for checking local mean time data. 44ba2b2efdSGlen BarberThanks in particular to Arthur David Olson, the project's founder and first 45ba2b2efdSGlen Barbermaintainer, to whom the time zone community owes the greatest debt of all. 46ba2b2efdSGlen BarberNone of them are responsible for remaining errors. 47ba2b2efdSGlen Barber 48ba2b2efdSGlen Barber----- 49ba2b2efdSGlen Barber 50ba2b2efdSGlen BarberThis file is in the public domain, so clarified as of 2009-05-17 by 51ba2b2efdSGlen BarberArthur David Olson. The other files in this distribution are either 52ba2b2efdSGlen Barberpublic domain or BSD licensed; see the file LICENSE for details. 53