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Debian 13, Postgres, and the US time zones

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Debian 13, Postgres, and the US time zones

Debian 13, Postgres, and the US time zones

5 comments

·September 12, 2025

donalhunt

What sort of monster are you by not defaulting to UTC on systems? (⊙＿⊙') /s

evdubs

I also ran into this using:

- Debian 13

- Interactive Brokers' Trader Workstation

- Racket's `gregor` date and time library

IBKR still sends the old, deprecated US/* timezones. As noted in the article, the solution is to `apt install tzdata-legacy`.

ggm

Is there a problem with ISO3166 denoted information in general or is there a specific US issue here? I would think ISO code denoted tzdata was a public good in some sense.

masklinn

All the legacy time zones were moved out of the default zoneinfo install. It’s not a us-specific issue but the legacy US/ timezones remain in widespread use, and they stop working on Debian 13 ootb (possibly Ubuntu noble as well?).

evdubs

You can see the zones that are deprecated at https://packages.debian.org/sid/all/tzdata-legacy/filelist