The 2016g release of the tz code and data is available. It reflects the
following changes, which were either circulated on the tz mailing list
or are relatively minor technical or administrative changes:
Changes to future time stamps
Turkey switched from EET/EEST (+02/+03) to permanent +03,
effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather
than an invented abbreviation for the new time.
New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52.
(Thanks to Tim Parenti.)
Changes to past time stamps
For America/Los_Angeles, spring-forward transition times have been
corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in
For zones using Soviet time on 1919-07-01, transitions to UT-based
time were at 00:00 UT, not at 02:00 local time. The affected
zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and
Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.)
Changes to past and future time zone abbreviations
The Factory zone now uses the time zone abbreviation -00 instead
of a long English-language string, as -00 is now the normal way to
represent an undefined time zone.
Several zones in Antarctica and the former Soviet Union, along
with zones intended for ships at sea that cannot use POSIX TZ
strings, now use numeric time zone abbreviations instead of
invented or obsolete alphanumeric abbreviations. The affected
zones are Antarctica/Casey, Antarctica/Davis,
Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera,
Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok,
Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita,
Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga,
Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin,
Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi,
Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg,
Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11,
Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5,
Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2,
Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8,
Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad,
Europe/Minsk, Europe/Samara, Europe/Volgograd, and
Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM
was replaced by +05, whereas MSK and MSD were kept as they are not
our invention and are widely used.
Changes to zone names
Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link.
(Thanks to David Massoud.)
Changes to code
zic no longer generates binary files containing POSIX TZ-like
strings that disagree with the local time type after the last
explicit transition in the data. This fixes a bug with
Africa/Casablanca and Africa/El_Aaiun in some year-2037 time
stamps on the reference platform. (Thanks to Alexander Belopolsky
for reporting the bug and suggesting a way forward.)
If the installed localtime and/or posixrules files are symbolic
links, zic now keeps them symbolic links when updating them, for
compatibility with platforms like OpenSUSE where other programs
configure these files as symlinks.
zic now avoids hard linking to symbolic links, avoids some
unnecessary mkdir and stat system calls, and uses shorter file
zdump has a new -i option to generate transitions in a
more-compact but still human-readable format. This option is
experimental, and the output format may change in future versions.
(Thanks to Jon Skeet for suggesting that an option was needed,
and thanks to Tim Parenti and Chris Rovick for further comments.)
Changes to build procedure
An experimental distribution format is available, in addition
to the traditional format which will continue to be distributed.
The new format is a tarball tzdb-VERSION.tar.lz with signature
file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory
tzdb-VERSION containing the code and data of the traditional
two-tarball format, along with extra data that may be useful.
(Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others
for comments about the experimental format.)
The release version number is now more accurate in the usual case
where releases are built from a Git repository. For example, if
23 commits and some working-file changes have been made since
release 2016g, the version number is now something like
'2016g-23-g50556e3-dirty' instead of the misleading '2016g'.
Official releases uses the same version number format as before,
e.g., '2016g'. To support the more-accurate version number, its
specification has moved from a line in the Makefile to a new
source file 'version'.
The experimental distribution contains a file to2050.tzs that
contains what should be the output of 'zdump -i -c 2050' on
primary zones. If this file is available, 'make check' now checks
that zdump generates this output.
'make check_web' now works on Fedora-like distributions.
Changes to documentation and commentary
tzfile.5 now documents the new restriction on POSIX TZ-like
strings that is now implemented by zic.
Comments now cite URLs for some 1917-1921 Russian DST decrees.
(Thanks to Alexander Belopolsky.)
tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J
(thanks to Meno Hochschild) and ThreeTen-Extra, and its
description of Java 8 has been brought up to date (thanks to
Stephen Colebourne). Its description of local time on Mars has
been updated to match current practice, and URLs have been updated
and some obsolete ones removed.
Here are links to the release files:
The files are also available via HTTP as follows: