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        Description

        2013e TZdata:

        The 2013e release of the tz code and data is available. It reflects
        the following changes circulated on the tz mailing list:

          Changes affecting near-future time stamps

            This year Fiji will start DST on October 27, not October 20.
            (Thanks to David Wheeler for the heads-up.) For now, guess that
            Fiji will continue to spring forward the Sunday before the fourth
            Monday in October.

          Changes affecting current and future time zone abbreviations

            Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
            time zone abbreviations since 1932. (Thanks to George Ziegler,
            Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
            Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
            Asia/Makassar, and Asia/Pontianak.

            Use ART (UTC-3, standard time), rather than WARST (also UTC-3, but
            daylight saving time) for San Luis, Argentina since 2009.

          Changes affecting Godthab time stamps after 2037 if version mismatch

            Allow POSIX-like TZ strings where the transition time's hour can
            range from -167 through 167, instead of the POSIX-required 0
            through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
            new Fiji rules. This is a more-compact way to represent
            far-future time stamps for America/Godthab, America/Santiago,
            Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
            Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by
            this change. (Derived from a suggestion by Arthur David Olson.)

            Allow POSIX-like TZ strings where daylight saving time is in
            effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western
            Argentina Summer Time all year. This supports a more-compact way
            to represent the 2013d data for America/Argentina/San_Luis.
            Because of the change for San Luis noted above this change does not
            affect the current data. (Thanks to Andrew Main (Zefram) for
            suggestions that improved this change.)

            Where these two TZ changes take effect, there is a minor extension
            to the tz file format in that it allows new values for the
            embedded TZ-format string, and the tz file format version number
            has therefore been increased from 2 to 3 as a precaution.
            Version-2-based client code should continue to work as before for
            all time stamps before 2038. Existing version-2-based client code
            (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
            files, and typically works in practice even for time stamps after
            2037; the only known exception is America/Godthab.

          Changes affecting time stamps before 1970

            Pacific/Johnston is now a link to Pacific/Honolulu. This corrects
            some errors before 1947.

            Some zones have been turned into links, when they differ from
            existing zones only in older data that was likely invented or that
            differs only in LMT or transition from LMT. These changes affect
            only time stamps before 1943. The affected zones are:
            Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
            America/Grenada, America/Guadeloupe, America/Marigot,
            America/Montserrat, America/St_Barthelemy, America/St_Kitts,
            America/St_Lucia, America/St_Thomas, America/St_Vincent,
            America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for
            confirming that the old Europe/Vaduz zone was wrong and the new
            link is better for WWII-era times.)

            Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects
            America/Cayman, America/Jamaica and America/Grand_Turk time stamps
            from 1890 to 1912.

            Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
            This affects Europe/Zurich time stamps from 1853 to 1894. (Thanks
            to Alois Treindl).

            Change the date of the circa-1850 Zurich transition from 1849-09-12
            to 1853-07-16, overriding Shanks with data from Messerli about
            postal and telegraph time in Switzerland.

          Changes affecting time zone abbreviations before 1970

            For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
            as Jakarta was called Batavia back then.

          Changes affecting API

            The 'zic' command now outputs a dummy transition when far-future
            data can't be summarized using a TZ string, and uses a 402-year
            window rather than a 400-year window. For the current data, this
            affects only the Asia/Tehran file. It does not affect any of the
            time stamps that this file represents, so zdump outputs the same
            information as before. (Thanks to Andrew Main (Zefram).)

            The 'date' command has a new '-r' option, which lets you specify
            the integer time to display, a la FreeBSD.

            The 'tzselect' command has two new options '-c' and '-n', which lets you
            select a zone based on latitude and longitude.

            The 'zic' command's '-v' option now warns about constructs that
            require the new version-3 binary file format. (Thanks to Arthur
            David Olson for the suggestion.)

            Support for floating-point time_t has been removed.
            It was always dicey, and POSIX no longer requires it.
            (Thanks to Eric Blake for suggesting to the POSIX committee to
            remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
            Heninger, Arthur David Olson, and Alois Treindl, for reporting
            bugs and elucidating some of the corners of the old floating-point
            implementation.)

            The signatures of 'offtime', 'timeoff', and 'gtime' have been
            changed back to the old practice of using 'long' to represent UT
            offsets. This had been inadvertently and mistakenly changed to
            'int_fast32_t'. (Thanks to Christos Zoulos.)

            The code avoids undefined behavior on integer overflow in some
            more places, including gmtime, localtime, mktime and zdump.

          Changes affecting the zdump utility

            zdump now outputs "UT" when referring to Universal Time, not "UTC".
            "UTC" does not make sense for time stamps that predate the introduction
            of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
            for clarifying UT vs UTC.)

          Data changes affecting behavior of tzselect and similar programs

            Country code BQ is now called the more-common name "Caribbean Netherlands"
            rather than the more-official "Bonaire, St Eustatius & Saba".

            Remove from zone.tab the names America/Montreal, America/Shiprock,
            and Antarctica/South_Pole, as they are equivalent to existing
            same-country-code zones for post-1970 time stamps. The data for
            these names are unchanged, so the names continue to work as before.

          Changes affecting code internals

            zic -c now runs way faster on 64-bit hosts when given large numbers.

            zic now uses vfprintf to avoid allocating and freeing some memory.

            tzselect now computes the list of continents from the data,
            rather than have it hard-coded.

            Minor changes pacify GCC 4.7.3 and GCC 4.8.1.

          Changes affecting the build procedure

            The 'leapseconds' file is now generated automatically from a
            new file 'leap-seconds.list', which is a copy of
            <ftp://time.nist.gov/pub/leap-seconds.list>.
            A new source file 'leapseconds.awk' implements this.
            The goal is simplification of the future maintenance of 'leapseconds'.

            When building the 'posix' or 'right' subdirectories, if the
            subdirectory would be a copy of the default subdirectory, it is
            now made a symbolic link if that is supported. This saves about
            2 MB of file system space.

            The links America/Shiprock and Antarctica/South_Pole have been
            moved to the 'backward' file. This affects only nondefault builds
            that omit 'backward'.

          Changes affecting version-control only

            .gitignore now ignores 'date'.

          Changes affecting documentation and commentary

            Changes to the 'tzfile' man page

              It now mentions that the binary file format may be extended in
              future versions by appending data.

              It now refers to the 'zdump' and 'zic' man pages.

            Changes to the 'zic' man page

              It lists conditions that elicit a warning with '-v'.

              It says that the behavior is unspecified when duplicate names
              are given, or if the source of one link is the target of another.

              Its examples are updated to match the latest data.

              The definition of white space has been clarified slightly.
              (Thanks to Michael Deckers.)

            Changes to the 'Theory' file

              There is a new section about the accuracy of the tz database,
              describing the many ways that errors can creep in, and
              explaining why so many of the pre-1970 time stamps are wrong or
              misleading (thanks to Steve Allen, Lester Caine, and Garrett
              Wollman for discussions that contributed to this).

              The 'Theory' file describes LMT better (this follows a
              suggestion by Guy Harris).

              It refers to the 2013 edition of POSIX rather than the 2004 edition.

              It's mentioned that excluding 'backward' should not affect the
              other data, and it suggests at least one zone.tab name per
              inhabited country (thanks to Stephen Colebourne).

              Some longstanding restrictions on names are documented, e.g.,
              'America/New_York' precludes 'America/New_York/Bronx'.

              It gives more reasons for the 1970 cutoff.

              It now mentions which time_t variants are supported, such as
              signed integer time_t. (Thanks to Paul Goyette for reporting
              typos in an experimental version of this change.)

              (Thanks to Philip Newton for correcting typos in these changes.)

            Documentation and commentary is more careful to distinguish UT in
            general from UTC in particular. (Thanks to Steve Allen.)

            Add a better source for the Zurich 1894 transition.
            (Thanks to Pierre-Yves Berger.)

            Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)


        Here are links to the release files:

          ftp://ftp.iana.org/tz/releases/tzcode2013e.tar.gz
          ftp://ftp.iana.org/tz/releases/tzdata2013e.tar.gz

        2013f tzdata:
        The 2013f 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 administrative changes:

          Changes affecting near-future time stamps

            Tocantins will very likely not observe DST starting this spring.
            (Thanks to Steffen Thorsen.)

            Jordan will likely stay at UTC+3 indefinitely, and will not fall
            back this fall.

            Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.)

          Changes affecting API

            The types of the global variables 'timezone' and 'altzone' (if present)
            have been changed back to 'long'. This is required for 'timezone'
            by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
            These variables were originally 'long' in the tz code, but were
            mistakenly changed to 'time_t' in 1987; nobody reported the
            incompatibility until now. The difference matters on x32, where
            'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)

          Changes affecting the build procedure

            Avoid long strings in leapseconds.awk to work around a mawk bug.
            (Thanks to Cyril Baurand.)

          Changes affecting documentation and commentary

            New file 'NEWS' that contains release notes like this one.

            Paraguay's law does not specify DST transition time; 00:00 is customary.
            (Thanks to Waldemar Villamayor-Venialbo.)

            Minor capitalization fixes.

          Changes affecting version-control only

            The experimental github repository now contains annotated and
            signed tags for recent releases, e.g., '2013e' for Release 2013e.
            Releases are tagged starting with 2012e; earlier releases were
            done differently, and tags would either not have a simple name or
            not exactly match what was released.

            'make set-timestamps' is now simpler and a bit more portable.


        Here are links to the release files:

          ftp://ftp.iana.org/tz/releases/tzcode2013f.tar.gz
          ftp://ftp.iana.org/tz/releases/tzdata2013f.tar.gz

        The files are also available via HTTP as follows:

          http://www.iana.org/time-zones/repository/releases/tzcode2013f.tar.gz
          http://www.iana.org/time-zones/repository/releases/tzdata2013f.tar.gz


        2013g tzdata:
        The 2013g 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 affecting current and near-future time stamps

            Morocco now observes DST from the last Sunday in March to the last
            Sunday in October, not April to September respectively. (Thanks
            to Steffen Thorsen.)

          Changes affecting 'zic'

            'zic' now runs on platforms that lack both hard links and symlinks.
            (Thanks to Theo Veenker for reporting the problem, for MinGW.)
            Also, fix some bugs on platforms that lack hard links but have symlinks.

            'zic -v' again warns that Asia/Tehran has no POSIX environment variable
            to predict the far future, fixing a bug introduced in 2013e.

          Changes affecting the build procedure

            The 'leapseconds' file is again put into the tzdata tarball.
            Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to
            Matt Burgess and Ian Abbott.) The timestamps of these and other
            dependent files in tarballs are adjusted more consistently.

          Changes affecting documentation and commentary

            The README file is now part of the data tarball as well as the code.
            It now states that files are public domain unless otherwise specified.
            (Thanks to Andrew Main (Zefram) for asking for clarifications.)
            Its details about the 1989 release moved to a place of honor near
            the end of NEWS.


        Here are links to the release files:

          ftp://ftp.iana.org/tz/releases/tzcode2013g.tar.gz
          ftp://ftp.iana.org/tz/releases/tzdata2013g.tar.gz

        The files are also available via HTTP as follows:

          http://www.iana.org/time-zones/repository/releases/tzcode2013g.tar.gz
          http://www.iana.org/time-zones/repository/releases/tzdata2013g.tar.gz

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                • Assignee:
                  aefimov Aleksej Efimov
                  Reporter:
                  aefimov Aleksej Efimov
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