[Bug 2107950] Autopkgtest regression report (tzdata/2025b-0ubuntu0.20.04.1)

[Ubuntu SRU Bot]

All autopkgtests for the newly accepted tzdata (2025b-0ubuntu0.20.04.1) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

libical3/unknown (amd64, ppc64el)
php7.4/unknown (amd64, ppc64el)
postgresql-12/12.22-0ubuntu0.20.04.2 (arm64, armhf)
postgresql-12/unknown (amd64)
python-dateutil/unknown (amd64, ppc64el)
reposurgeon/unknown (amd64, ppc64el)
ruby-tzinfo/unknown (ppc64el)
tzdata/unknown (amd64, arm64, ppc64el)
ubuntu-dev-tools/0.193ubuntu4~20.04.3 (s390x)


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/2107950

Title:
  tzdata 2025b ICU data update

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
Status in tzdata source package in Plucky:
  Fix Committed

Bug description:
  [ Impact ]

  The ICU data we embed in tzdata was out of sync with the 2025b SRUs
  (bug #2104284) because they were not released back then. We need to do
  another round of SRUs.

  [ Test Plan ]

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

  * python-icu: test_2025b

  So the test plan is to check that the autopkgtest succeeds.

  [ Other Info ]

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

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