[Bug 1909698] Please test proposed package

[Steve Langasek]

Hello Tw1ce, or anyone else affected,

Accepted tzdata into xenial-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/tzdata/2020f-
0ubuntu0.16.04 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
xenial to verification-done-xenial. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-xenial. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

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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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