The test case can be distilled down to:
```
ln -sf /usr/share/zoneinfo/EST /etc/localtime
dpkg-reconfigure --frontend noninteractive tzdata
```
On Ubuntu 22.04 (jammy) convert_timezone() in tzdata.config maps EST to
America/Indianapolis which is a symlink to America/Indiana/Indianapolis.
Bug 1: America/Indianapolis is not an option in debconf and therefore
the first geographic area "Adak" is used.
Possible bug 2: convert_timezone() in tzdata.config maps EST to
America/Indiana/Indianapolis, but EST is not a symlink to
America/Indiana/Indianapolis. If I saw that correctly, EST does not take
daylight saving into account.
** Summary changed:
- timezone changed unexpectedly from EST to America/Adak
+ timezone changed unexpectedly from EST to America/Adak or
America/Indiana/Indianapolis
** Changed in: tzdata (Ubuntu)
Status: Confirmed => Triaged
--
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Touch seeded packages, which is subscribed to tzdata in Ubuntu.
https://bugs.launchpad.net/bugs/2055718
Title:
timezone changed unexpectedly from EST to America/Adak or
America/Indiana/Indianapolis
Status in tzdata package in Ubuntu:
Triaged
Bug description:
A user reported this regression on
https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/2052739:
UPDATE: I don't think it's a regression anymore, see comment #5
"""
Hello.
After automatic upgrade of tzdata from 2023c-0ubuntu0.22.04.2 to
2024a-0ubuntu0.22.04
the previously set EST time zone was automatically changed to "America/Adak"
or "America/Indiana/Indianapolis" on all our servers (50+).
Look like a bug in tzdata configure script.
"""
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