"What time is it?" -- Richard Deacon as The King "Any time you want it to be." -- Frank Baxter as The Scientist (from the Bell System film "About Time") The Time Zone Database (often called tz or zoneinfo) contains code and data that represent the history of local time for many representative locations around the globe. It is updated periodically to reflect changes made by political bodies to time zone boundaries, UTC offsets, and daylight-saving rules.
Unless otherwise specified, all files in the tz code and data are in
the public domain, so clarified as of 2009-05-17 by Arthur David Olson.
The few exceptions are code derived from BSD, which uses the BSD license.
Here is a recipe for acquiring, building, installing, and testing the tz distribution on a GNU/Linux or similar host. mkdir tz cd tz wget --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz' gzip -dc tzcode-latest.tar.gz | tar -xf - gzip -dc tzdata-latest.tar.gz | tar -xf - Be sure to read the comments in "Makefile" and make any changes needed
Guy Harris; Mark Horton; John Mackin; and Bradley White. Thanks also to Michael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales for testing work, and to Gwillim Law for checking local mean time data. Thanks in particular to Arthur David Olson, the project's founder and first maintainer, to whom the time zone community owes the greatest debt of all. None of them are responsible for remaining errors. Look in <ftp://ftp.iana.org/tz/releases/> for updated versions of these files. Please send comments or information to firstname.lastname@example.org.
This file is in the public domain, so clarified as of 2009-05-17 by
Arthur David Olson. The other files in this distribution are either
public domain or BSD licensed; see the file LICENSE for details.