[Bug 2104284] Autopkgtest regression report (tzdata/2025b-0ubuntu0.20.04)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted tzdata (2025b-0ubuntu0.20.04) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

postgresql-12/12.22-0ubuntu0.20.04.2 (amd64, arm64, armhf)


Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-
migration/focal/update_excuses.html#tzdata

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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https://bugs.launchpad.net/bugs/2104284

Title:
  tzdata 2025b release

Status in tzdata package in Ubuntu:
  New
Status in tzdata source package in Focal:
  Fix Committed
Status in tzdata source package in Jammy:
  Fix Committed
Status in tzdata source package in Noble:
  Fix Committed
Status in tzdata source package in Oracular:
  Fix Committed

Bug description:
  [ Impact ]

  The 2025b release contains the following changes:

  * New America/Coyhaique zone for Aysén Region in Chile, which moves
    from -04/-03 to -03. It will not change its clocks on 2025-04-05.
  * Improve historical data for Iran

  [ Test Plan ]

  Test cases were added to the autopkgtest to cover the testing:

  * python: test_2025b

  So the test plan is to check that the autopkgtest succeeds. Since
  https://launchpad.net/bugs/207604 hasn't been backported to focal, we
  need to test focal manually:

  * dpkg-reconfigure tzdata
  * Select America/Coyhaique
  * This zone should be available

  [ Other Info ]

  * The autopkgtest for chrony is flaky on jammy and newer (see bug #2002910).
  * The oracular autopkgtest for exchange-calendars needs to use 4.5.5-2ubuntu0.1
  * The focal autopkgtest for postgresql-12 needs to use 12.22-0ubuntu0.20.04.3

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