13:51 <rbasak> bdrung: tzdata in Bionic has quite a bit of churn in
debian/tzdata.templates, including the removal of Pacific-New from
tzdata/Zones/US. I didn't see any removals in the later series. Do we
have anything that demonstrates that this is safe? Shouldn't the choice
be preserved somehow?
14:53 <bdrung> rbasak, previous SRUs forgot to regenerate
debian/tzdata.templates. You could use 2022g and regenerate
debian/tzdata.templates to see what previous SRUs should have included
in their debdiff.
14:54 <bdrung> rbasak, Pacific-New was added but was never used.
upstream removed Pacific-New some time ago.
15:13 <bdrung> rbasak, checked that. 2018a removed Pacific-New
15:19 <rbasak> bdrung: yeah but I wouldn't expect removals to be
followed in SRUs. If it was user-selectable, then wouldn't dropping it
be a regression for users who might have selected it previously?
15:22 <bdrung> rbasak, yes. That regression would have been happened
years ago when upstream removed Pacific-New.
15:26 <rbasak> bdrung: OK, so Pacific-New in bionic-updates today is
already broken?
15:27 <rbasak> If that's the case then there will be no SRU regression
so that's fine, but I'd like to document that somewhere. Can you confirm
and I'll just stick this conversation into a bug comment?
15:28 <bdrung> rbasak, I checked the history. Even 2018d-1 did not have
Pacific-New as option (the source package has an outdated
tzdata.templates). So it was never selectable for bionic users.
15:29 <bdrung> 2018d-1 was the version of the bionic release.
** Changed in: tzdata (Ubuntu Bionic)
Status: Triaged => Fix Committed
** Tags removed: verification-done-bionic
** Tags added: verification-needed-bionic
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https://bugs.launchpad.net/bugs/2012599
Title:
tzdata 2023a/2023b/2023c release - Egypt restoring DST
Status in tzdata package in Ubuntu:
Fix Released
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 Committed
Status in tzdata source package in Lunar:
Fix Released
Bug description:
[ Impact ]
Recently the Egyptian authorities decided to restore DST. The first
switch after the change is expected to take place on last Friday of
April. The upstream tzdata 2023a release already reflects this change.
The 2023a release contains the following changes:
* Egypt now uses DST again, from April through October.
* This year Morocco springs forward April 23, not April 30.
* Palestine delays the start of DST this year.
* Much of Greenland still uses DST from 2024 on.
The 2023c release reverts the changes done in 2023b.
[ Test Plan ]
Test cases were added to the autopkgtest to cover the testing:
* python: test_2023a
* python: test_2023c
* python: test_systemv_timezones (for releases <= 20.04 LTS)
* python-icu: test_2023a (only for kinetic, jammy, focal)
So the test plan is to check that the autopkgtest succeeds.
Alternatively the python test_2023a can be run manually:
* Set system timezone to Egypt (e.g. Africa/Cairo).
* Set system time to 2023-04-27 23:59.
* Wait and observe what happens at 2023-04-28 0:00
[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. This is done by the test_systemv_timezones test case or can
be checked manually with the following:
diff <(zdump -v America/Phoenix | cut -d' ' -f2-) <(zdump -v SystemV/MST7 |
cut -d' ' -f2-)
[ Where problems could occur ]
* Systems with incorrect timezone set (e.g. located outside of Egypt
but still using Egyptian time) may observe unexpected time shift.
[ Other Info ]
The autopkgtest for chrony is flaky on jammy and kinetic (see bug
#2002910).
* More information with sources:
https://en.wikipedia.org/wiki/Daylight_saving_time_in_Egypt#:~:text=Daylight%20saving%20time%20(DST)%20has,(DST)%20as%20of%202023.
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