2018g release of tz code and data available

Oct. 27, 2018

      The 2018g 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:

   Briefly:
     Morocco switches to permanent +01 on 2018-10-27.

   Changes to future timestamps

     Morocco switches from +00/+01 to permanent +01 effective 2018-10-27,
     so its clocks will not fall back on 2018-10-28 as previously scheduled.
     (Thanks to Mohamed Essedik Najd and Brian Inglis.)

   Changes to code

     When generating TZif files with leap seconds, zic no longer uses a
     format that trips up older 32-bit clients, fixing a bug introduced
     in 2018f.  (Reported by Daniel Fischer.)  Also, the zic workaround
     for QTBUG-53071 now also works for TZif files with leap seconds.

     The translator to rearguard format now rewrites the line
     "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to
     "Rule Japan 1948 1951 - Sep Sun>=9  1:00 0 S".
     This caters to zic before 2007 and to Oracle TZUpdater 2.2.0
     and earlier.  (Reported by Christos Zoulas.)

   Changes to past time zone abbreviations

     Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii.
     This reverts to 2011h, as the abbreviation change in 2011i was
     likely inadvertent.

   Changes to documentation

     tzfile.5 has new sections on interoperability issues.

Here are links to the release files:

   https://www.iana.org/time-zones/repository/releases/tzcode2018g.tar.gz
   https://www.iana.org/time-zones/repository/releases/tzdata2018g.tar.gz
   https://www.iana.org/time-zones/repository/releases/tzdb-2018g.tar.lz

As usual, links to the latest release files are here:

   https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz
   https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz
   https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz

Links are also available via plain HTTP, and via FTP from
ftp://ftp.iana.org/tz/releases with the same basenames as above.

Each release file has a GPG signature, which can be retrieved by appending 
".asc" to the above URLs. Copies of these signatures are appended to this message.

This release corresponds to commit 19e2701f468d5f9548a650144edeaf659766b1ea 
dated 2018-10-26 22:22:45 -0700 and tagged '2018g' in the development GitHub 
repository at <https://github.com/eggert/tz>.

Here are the SHA-512 checksums for the release files:

58f89b7323bfe795c5f13039f7527d18b15c9e37fce6e9fa1a402ce2689bf5c772cf1ffb86f23309814a563f9f429da472df1229818b07b1e04f16bdedb21484 
  tzcode2018g.tar.gz
92e9bbd61f51be8f2cf7ec9491691e5e2f97803914dbad77b7fb8b6600ed68fc3b98450fc808bb2d4c6c835df5f9eb7bf4529d059d9b1370f2ab4c12e7f1adfa 
  tzdata2018g.tar.gz
bd681d6d635cf58a5a111f158b80c8d040a2700e11970f8c94433a7009f8d2113ad7ff665ef6681200e6f63758a6f2183897f5a17fb5c6098a3e96ae0b3fa96e 
  tzdb-2018g.tar.lz

Here are the GPG checksums for the release files:

PS.  If your tzdata parser does not yet support negative DST offsets,
this particular release's data entries are also available in a
rearguard-format tarball and signature that does not contain such
offsets.  This is intended to be a temporary transition aid for these
parsers.  The URLs are:

https://web.cs.ucla.edu/~eggert/tz/release/2018g/tzdata2018g-rearguard.tar.g...
https://web.cs.ucla.edu/~eggert/tz/release/2018g/tzdata2018g-rearguard.tar.g...

with the following SHA-512 and GPG checksums:

f92a4f64ddf723389344bbba4350c418d0111c73170b70f891dc72d78e560e24431658ab1a8457e9f4fa69c4dc8138def8783302b6b0ddef7615153e05da47c7 
  tzdata2018g-rearguard.tar.gz

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Paul Eggert

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