Tzdata

Upstream version 2020e released 2020-12-22T23:14:34+00:00

Briefly:

Volgograd switches to Moscow time on 2020-12-27 at 02:00.

Changes to future timestamps

Volgograd changes time zone from +04 to +03 on 2020-12-27 at 02:00. (Thanks to
Alexander Krivenyshev and Stepan Golosunov.)

Changes to past timestamps

Correct many pre-1986 transitions, fixing entries originally derived from
Shanks. The fixes include:

- Australia: several 1917 through 1971 transitions
- Bahamas: several 1941 through 1945 transitions
- Bermuda: several 1917 through 1956 transitions
- Belize: several 1942 through 1968 transitions
- Ghana: several 1915 through 1956 transitions
- Israel and Palestine: several 1940 through 1985 transitions
- Kenya and adjacent: several 1908 through 1960 transitions
- Nigeria and adjacent: correcting LMT in Lagos, and several 1905 through 1919 transitions
- Seychelles: the introduction of standard time in 1907, not 1906
- Vanuatu: DST in 1973-1974, and a corrected 1984 transition

(Thanks to P Chan.)

Because of the Australia change, Australia/Currie (King Island) is no longer
needed, as it is identical to Australia/Hobart for all timestamps since 1970 and
was therefore created by mistake. Australia/Currie has been moved to the
'backward' file and its corrected data moved to the 'backzone' file.

Changes to past time zone abbreviations and DST flags

To better match legislation in Turks and Caicos, the 2015 shift to year-round
observance of -04 is now modeled as AST throughout before returning to Eastern
Time with US DST in 2018, rather than as maintaining EDT until 2015-11-01.
(Thanks to P Chan.)

Changes to documentation

The zic man page now documents zic's coalescing of transitions when a zone falls
back just before DST springs forward.

Upstream version 2020d released 2020-10-21T18:24:13+00:00

Briefly:

Palestine ends DST earlier than predicted, on 2020-10-24.

Changes to past and future timestamps

Palestine ends DST on 2020-10-24 at 01:00, instead of 2020-10-31 as previously
predicted (thanks to Sharef Mustafa.) Its 2019-10-26 fall-back was at 00:00,
not 01:00 (thanks to Steffen Thorsen.) Its 2015-10-23 transition was at 01:00
not 00:00, and its spring 2020 transition was on March 28 at 00:00, not March 27
(thanks to Pierre Cashon.) This affects Asia/Gaza and Asia/Hebron. Assume
future spring and fall transitions will be on the Saturday preceding the last
Sunday of March and October, respectively.

Relevant portion of the upstream changelog:

> Release 2020c - 2020-10-16 11:15:53 -0700
>
> Briefly:
> Fiji starts DST later than usual, on 2020-12-20.
>
> Changes to future timestamps
>
> Fiji will start DST on 2020-12-20, instead of 2020-11-08 as
> previously predicted. DST will still end on 2021-01-17.
> (Thanks to Raymond Kumar and Alan Mintz.) Assume for now that
> the later-than-usual start date is a one-time departure from the
> recent pattern.

Upstream changelog contents (only the data-related aspects of this apply):

Release notes are:

> Briefly:
> Revised predictions for Morocco's changes starting in 2023.
> Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08.
> Macquarie Island has stayed in sync with Tasmania since 2011.
> Casey, Antarctica is at +08 in winter and +11 in summer.
> zic no longer supports -y, nor the TYPE field of Rules.
>
> Changes to future timestamps
>
> Morocco's spring-forward after Ramadan is now predicted to occur
> no sooner than two days after Ramadan, instead of one day.
> (Thanks to Milamber.) The first altered prediction is for 2023,
> now predicted to spring-forward on April 30 instead of April 23.
>
> Changes to past and future timestamps
>
> Casey Station, Antarctica has been using +08 in winter and +11 in
> summer since 2018. The most recent transition from +08 to +11 was
> 2020-10-04 00:01. Also, Macquarie Island has been staying in
> sync with Tasmania since 2011. (Thanks to Steffen Thorsen.)
>
> Changes to past and future time zone abbreviations and DST flags
>
> Canada's Yukon, represented by America/Whitehorse and
> America/Dawson, changes its time zone rules from -08/-07 to
> permanent -07 on 2020-11-01, not on 2020-03-08 as 2020a had it.
> This change affects only the time zone abbreviation (MST vs PDT)
> and daylight saving flag for the period between the two dates.
> (Thanks to Andrew G. Smith.)
>
> Changes to past timestamps
>
> Correct several transitions for Hungary for 1918/1983.
> For example, the 1983-09-25 fall-back was at 01:00, not 03:00.
> (Thanks to Géza Nyáry.) Also, the 1890 transition to standard
> time was on 11-01, not 10-01 (thanks to Michael Deckers).
>
> The 1891 French transition was on March 16, not March 15. The
> 1911-03-11 French transition was at midnight, not a minute later.
> Monaco's transitions were on 1892-06-01 and 1911-03-29, not
> 1891-03-15 and 1911-03-11. (Thanks to Michael Deckers.)
>
> Changes to code
>
> Support for zic's long-obsolete '-y YEARISTYPE' option has been
> removed and, with it, so has support for the TYPE field in Rule
> lines, which is now reserved for compatibility with earlier zic.
> These features were previously deprecated in release 2015f.
> (Thanks to Tim Parenti.)
>
> zic now defaults to '-b slim' instead of to '-b fat'.
>
> zic's new '-l -' and '-p -' options uninstall any existing
> localtime and posixrules files, respectively.
>
> The undocumented and ineffective tzsetwall function has been
> removed.
>
> Changes to build procedure
>
> The Makefile now defaults POSIXRULES to '-', so the posixrules
> feature (obsolete as of 2019b) is no longer installed by default.
>
> Changes to documentation and commentary
>
> The long-obsolete files pacificnew, systemv, and yearistype.sh have
> been removed from the distribution. (Thanks to Tim Parenti.)

This release includes the IANA database version 2020a. It does not include the posix/ and right/ subdirectories.

This release removes the `posixrules` zone.