[Bug 1909698] Re: new upstream release 2020f

[Brian Murray]

We can see that there is updated information for Volgograd, so setting
to v-done for groovy.

(groovy-amd64)root at impulse:~# apt-cache policy tzdata
tzdata:
  Installed: 2020f-0ubuntu0.20.10
  Candidate: 2020f-0ubuntu0.20.10
  Version table:
 *** 2020f-0ubuntu0.20.10 500
        500 http://archive.ubuntu.com/ubuntu groovy-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     2020d-1ubuntu1 500
        500 http://192.168.10.7/ubuntu groovy-updates/main amd64 Packages
        500 http://192.168.10.7/ubuntu groovy-security/main amd64 Packages
     2020b-1ubuntu1 500
        500 http://192.168.10.7/ubuntu groovy/main amd64 Packages
(groovy-amd64)root at impulse:~# zdump -v Europe/Volgograd | tail -n 6
Europe/Volgograd  Sat Oct 27 22:59:59 2018 UT = Sun Oct 28 01:59:59 2018 +03 isdst=0 gmtoff=10800
Europe/Volgograd  Sat Oct 27 23:00:00 2018 UT = Sun Oct 28 03:00:00 2018 +04 isdst=0 gmtoff=14400
Europe/Volgograd  Sat Dec 26 21:59:59 2020 UT = Sun Dec 27 01:59:59 2020 +04 isdst=0 gmtoff=14400
Europe/Volgograd  Sat Dec 26 22:00:00 2020 UT = Sun Dec 27 01:00:00 2020 +03 isdst=0 gmtoff=10800
Europe/Volgograd  9223372036854689407 = NULL
Europe/Volgograd  9223372036854775807 = NULL

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https://bugs.launchpad.net/bugs/1909698

Title:
  new upstream release 2020f

Status in tzdata package in Ubuntu:
  In Progress
Status in tzdata source package in Xenial:
  Fix Committed
Status in tzdata source package in Bionic:
  Fix Committed
Status in tzdata source package in Focal:
  Fix Committed
Status in tzdata source package in Groovy:
  Fix Committed

Bug description:
  New upstream version, affecting the following timestamp:
    - Volgograd switches to Moscow time on 2020-12-27 at 02:00.

  The ICU timezone data has not yet been updated upstream so those
  changes will be included in a later SRU.

  Verification is done with 'zdump'. The first timezone that gets
  changed in the updated package is dumped with "zdump -v
  $region/$timezone_that_changed" (this needed to be greped for in
  /usr/share/zoneinfo/). [For example: "zdump -v Africa/Casablanca".]
  This is compared to the same output after the updated package got
  installed. If those are different the verification is considered done.

  $region/$timezone = Europe/Volgograd

  Additionally, an upstream update of tzdata removed the "old" SystemV
  timezones, so we should ensure that they are kept in Ubuntu 20.04 LTS
  and earlier releases. Subsequently, these should be checked for using
  the following:

  diff <(zdump -v America/Phoenix | cut -d' ' -f2-) <(zdump -v
  SystemV/MST7 | cut -d' ' -f2-)

  Nothing should be returned by the above command.

  [Original Description]
  https://www.iana.org/time-zones tzdata 2020f already exists, please update the package.

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