[Bug 1986984] Please test proposed package

[Robie Basak]

Hello Jason, or anyone else affected,

Accepted tzdata into bionic-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/tzdata/2022c-0ubuntu0.18.04.0 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-
bionic to verification-done-bionic. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-bionic. 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/1986984

Title:
  [FFe] tzdata 2022c update

Status in tzdata package in Ubuntu:
  Fix Released
Status in tzdata source package in Xenial:
  Confirmed
Status in tzdata source package in Bionic:
  Fix Committed
Status in tzdata source package in Focal:
  Fix Committed
Status in tzdata source package in Jammy:
  Fix Committed
Status in tzdata source package in Kinetic:
  Fix Released

Bug description:
  New timezone data, with the following timezones impacted:
  - Chile will spring forward on 2022-09-11, not 2022-09-04 (America/Santiago)
  - Iran no longer observes DST (Asia/Tehran)

  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 needs to be greped for in
  /usr/share/zoneinfo/). [For example: 'zdump -v Asia/Gaza'.] This is
  compared to the same output after the updated package got installed.
  If those are different the verification is considered done.

  [Test Case for all releases]
  1) zdump -v America/Santiago | grep 'Sep.*2022'
    -> should indicate Sep 11, not Sep 4
  2) zdump -v Asia/Tehran | tail
    -> last dates should be in 2022, not in 2499

  [Test Case for releases >= 20.04 LTS]

  For releases with ICU timezone data verification is done using the following with dates before and after the change:
  1) sudo apt-get install python3-icu
  2) Run the following python script:

  from datetime import datetime
  from icu import ICUtzinfo, TimeZone
  tz = ICUtzinfo(TimeZone.createTimeZone("America/Santiago"))
  always_before = datetime(2022, 9, 1)
  now_before = datetime(2022, 9, 8)
  always_after = datetime(2022, 9, 12)
  assert(tz.utcoffset(always_before) == tz.utcoffset(now_before))
  assert(tz.utcoffset(now_before) != tz.utcoffset(always_after))

  The assertions would crash on 2022a.

  [Test Case for releases <= 20.04 LTS]

  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 report]
  tzdata 2022b and 2022c were just released that includes some timezone changes for Chile. According to the tzdata lib listed for Ubuntu 20.04, the latest package is 2022a. Any idea when 2022b or 2022c will be available? Chile made a change to the start of their daylight savings and pushed it from Sept 4th to the 11th, so we really need our servers updated before the 4th.

  Thanks

  Jason

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