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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https://bugs.launchpad.net/bugs/2055718
Title:
timezone changed unexpectedly from EST to America/Adak or
America/Indiana/Indianapolis
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