[tz] [tz-announce] 2020c release of tz code and data available

[Paul Eggert]

The 2020c 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:
     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.

   Changes to build procedure

     Rearguard tarballs now contain an empty file pacificnew.
     Some older downstream software expects this file to exist.
     (Problem reported by Mike Cullinan.)

Here are links to the release files:

   https://www.iana.org/time-zones/repository/releases/tzcode2020c.tar.gz
   https://www.iana.org/time-zones/repository/releases/tzdata2020c.tar.gz
   https://www.iana.org/time-zones/repository/releases/tzdb-2020c.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 ab21ad9710b88f28995b7ed47c6efda47ffb1be5 
dated 2020-10-16 11:15:53 -0700 and tagged '2020c' in the development GitHub 
repository at <https://github.com/eggert/tz>.

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

c77fa69d2a005ba7cff602b2267983fd01613f81385bc13c90b9581d69fb0ac73491641cac81e0e5d7dd00ed120c45103859902c2d10da9d25c98b33354f88f7 
  tzcode2020c.tar.gz
bbd66fe236ba0949261cb238bfed454c03b4500b239dc38f1b8fef8d229136f5964c1a8386fe54484e4e5e34a3c28a7b66ee7374ff7e0dd07865d78fc53bf96c 
  tzdata2020c.tar.gz
2b436868e33d9de284a97ec75990995c9ffd8b3086b5d93613b119762492df3d4be79d3e910ba1bbacb005f44d36dca31b72f9d314bafcc23b790628c3dc47ec 
  tzdb-2020c.tar.lz

Here are the GPG digital signatures for the release files:

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PS. If your tzdata parser does not yet support negative DST offsets or times 
past 24:00, or if it insists on a 'pacificnew' file that is no longer present, 
this release's data entries can be turned into a rearguard-format tarball that 
should work even with these older parsers. This is intended to be a temporary 
transition aid for these parsers. To generate a rearguard-format tarball, obtain 
the full distribution as described above, and run the command 'make 
rearguard_tarballs' on a development host. Or you can run 'make rearguard.zi' to 
generate a single file that can be fed directly to a parser that works like 'zic'.