Time zone database and code
C HTML Roff Makefile Shell Awk Perl
Latest commit afdcaad Feb 16, 2017 @timparenti timparenti committed with No leap second on 2017-06-30.
Per IERS Bulletin C53 (2017-01-09), no leap second on 2017-06-30.
http://datacenter.iers.org/eop/-/somos/5Rgv/getTX/16/bulletinc-053.txt

* leap-seconds.list: Update file from NIST, retrieved from
<ftp://time.nist.gov/pub/leap-seconds.list>.
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.gitignore Go back to lz tarball; improve documentation Aug 30, 2016
CONTRIBUTING * CONTRIBUTING: Call the GitHub repository "development" Nov 11, 2016
LICENSE Go back to lz tarball; improve documentation Aug 30, 2016
Makefile Port zdump to -DUSE_LTZ=0 etc. Dec 21, 2016
NEWS Move Pacific/Johnston to 'backward' Feb 10, 2017
README Document the 'version' file Nov 9, 2016
Theory Document preferences for historical abbreviations Jan 16, 2017
africa Update comments to put Law in past tense Feb 10, 2017
antarctica Southern Chile moves from -04/-03 to -03 Dec 5, 2016
asctime.c Remove duplication between private.h and zdump.c Jan 17, 2017
asia Mongolia no longer observes DST Feb 8, 2017
australasia Move Pacific/Johnston to 'backward' Feb 10, 2017
backward Move Pacific/Johnston to 'backward' Feb 10, 2017
backzone Prefer UT +-NN notation for UT-offset time zones in comments. Aug 25, 2016
checklinks.awk Clarify licensing status Dec 8, 2015
checktab.awk checktab.awk: don't repeat missing comment errors Feb 13, 2016
date.1 date +%z now outputs -0000 for uninhabited Jan 15, 2017
date.c Use angle brackets for system includes Jan 17, 2017
difftime.c Avoid unnecessary casts in difftime Jul 27, 2015
etcetera Phase out alphanumeric abbrs from etcetera Aug 23, 2016
europe Update comments to put Law in past tense Feb 10, 2017
factory Spelling fixes Aug 24, 2016
iso3166.tab * iso3166.tab: Accent "Curaçao". (Thanks to Jiri Bohac.) Nov 16, 2016
leap-seconds.list No leap second on 2017-06-30. Feb 16, 2017
leapseconds.awk Update leap-seconds file expiration Feb 22, 2016
localtime.c Use angle brackets for system includes Jan 17, 2017
newctime.3 Add documentation for the core NetBSD-inspired functions. Aug 26, 2014
newstrftime.3 date +%z now outputs -0000 for uninhabited Jan 15, 2017
newtzset.3 Document TZ=<...> in newtzset.3 Aug 19, 2016
northamerica Move Pacific/Johnston to 'backward' Feb 10, 2017
pacificnew Switch back to ASCII for symbols. Jun 20, 2014
private.h Remove duplication between private.h and zdump.c Jan 17, 2017
southamerica Update NEWS and fix typo Jan 20, 2017
strftime.c Remove duplication between private.h and zdump.c Jan 17, 2017
systemv Simplify use of URLs in text files. Jun 16, 2014
time2posix.3 Document thread-safe functions in man pages. Aug 25, 2014
tz-art.htm * tz-art.htm (Comics): Add xkcd 1799 (thanks to Guy Harris). Feb 15, 2017
tz-how-to.html Call the new tarball experimental Sep 6, 2016
tz-link.htm * tz-link.htm: Mention geo-tz. (Thanks to Evan Siroky.) Dec 13, 2016
tzfile.5 Fix bug with Casablanca in late 2037 Aug 5, 2016
tzfile.h Remove duplication between private.h and zdump.c Jan 17, 2017
tzselect.8 Rename time.tab to zone1970.tab. Jul 31, 2014
tzselect.ksh tzselect: fix Julian-day TZ validation bug Mar 6, 2016
workman.sh Simplify use of URLs in text files. Jun 16, 2014
yearistype.sh Distinguish hyphen from minus from dashes. Jun 18, 2014
zdump.8 zdump -i omits ":" in numeric time zones Dec 19, 2016
zdump.c Remove duplication between private.h and zdump.c Jan 17, 2017
zic.8 Fix "-"s in zic man page with Bell Labs troff May 29, 2016
zic.c Use angle brackets for system includes Jan 17, 2017
zone.tab Move Pacific/Johnston to 'backward' Feb 10, 2017
zone1970.tab Southern Chile moves from -04/-03 to -03 Dec 5, 2016
zoneinfo2tdf.pl Rename fields of Link lines for clarity. Aug 17, 2014

README

README for the tz distribution

"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.

See <https://www.iana.org/time-zones/repository/tz-link.html> or the
file tz-link.htm for how to acquire the code and data.  Once acquired,
read the comments in the file 'Makefile' and make any changes needed
to make things right for your system, especially if you are using some
platform other than GNU/Linux.  Then run the following commands,
substituting your desired installation directory for "$HOME/tzdir":

	make TOPDIR=$HOME/tzdir install
	$HOME/tzdir/etc/zdump -v America/Los_Angeles

Historical local time information has been included here to:

*	provide a compendium of data about the history of civil time
	that is useful even if not 100% accurate;

*	give an idea of the variety of local time rules that have
	existed in the past and thus an idea of the variety that may be
	expected in the future;

*	provide a test of the generality of the local time rule description
	system.

The information in the time zone data files is by no means authoritative;
fixes and enhancements are welcome.  Please see the file CONTRIBUTING
for details.

Thanks to these Time Zone Caballeros who've made major contributions to the
time conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz;
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.

-----

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.