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Time zone database and code
C HTML Groff Makefile Shell Awk Perl

Fix comments re NK transition time, abbreviation

* asia (Asia/Pyongyang): Confirm 00:00 as transition time.
Fix commentary about abbreviation.
latest commit 2fba5e1535
@eggert authored
Failed to load latest commit information.
.gitignore * .gitignore: Ignore *.a files.
CONTRIBUTING * CONTRIBUTING: Prefer an https URL, as that's friendlier
Makefile Release tzcode2015f and tzdata2015f.
NEWS Release tzcode2015f and tzdata2015f.
README Reword so that it does not matter whether the word "data" is plural.
Theory North Korea changes to +0830 effective August 15
africa A few more instances of "No."
antarctica Propagate Chile changes to Antarctica/Palmer
asctime.c Fix EOVERFLOW-related problems noted by Chistos Zoulas.
asia Fix comments re NK transition time, abbreviation
australasia Move four out-of-scope zones to 'backzone'
backward Fix recently-introduced 'make check' failure
backzone Guess Cayman Is will observe DST starting 2016
checklinks.awk Check for links to links.
checktab.awk Move one out-of-scope zone to 'backzone'
date.1 Port 'date' better to POSIX 1003.1-2001 and later
date.c Remove support for setting the date
difftime.c Avoid unnecessary casts in difftime
etcetera Simplify use of URLs in text files.
europe * NEWS, europe: Mention Herbert Samuel.
factory Simplify use of URLs in text files.
iso3166.tab Spell Åland etc. with accents in iso3166.tab
leap-seconds.list No leap second on 2015-12-31.
leapseconds.awk * leapseconds.awk, NEWS: Also output expiration date comment.
localtime.c Port localtime.c's gmtime to Visual Studio 2013
newctime.3 Add documentation for the core NetBSD-inspired functions.
newstrftime.3 Document thread-safe functions in man pages.
newtzset.3 Fiji observes DST from 2014-11-02 02:00 to 2015-01-18 03:00.
northamerica A few more instances of "No."
pacificnew Switch back to ASCII for symbols.
private.h Port 'date' better to POSIX 1003.1-2001 and later
southamerica A few more instances of "No."
strftime.c Pacify Visual Studio 2013 'const' again
systemv Simplify use of URLs in text files.
time2posix.3 Document thread-safe functions in man pages.
tz-art.htm Fix HTML typo
tz-link.htm HTML link maintenance
tzfile.5 Reword so that it does not matter whether the word "data" is plural.
tzfile.h Use bool for boolean.
tzselect.8 Rename time.tab to zone1970.tab.
tzselect.ksh tzselect: port to POSIX sh and fix a typo
workman.sh Simplify use of URLs in text files.
yearistype.sh Distinguish hyphen from minus from dashes.
zdump.8 * zdump.8: Be more specific about when a year starts.
zdump.c Pacify Visual Studio 2013 'const' yet again
zic.8 Support %z in Zone formats
zic.c Fix sign of %z output, and add DST offset
zone.tab Improve comments for Halifax and Glace Bay
zone1970.tab Improve comments for Halifax and Glace Bay
zoneinfo2tdf.pl Rename fields of Link lines for clarity.

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.

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
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.

Look in <ftp://ftp.iana.org/tz/releases/> for updated versions of these files.

Please send comments or information to tz@iana.org.
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