Post #2316086
2026-05-09 20:57 UTC
@alfonsosiciliano@mastodon.bsd.cafe The tzdata contains a file called backward. Zones like Europe/Busingen being listed in backward is basically a deprecation marker. Apps should consider those mappings as otherwise you end up with things like two separate zones for Kyiv.
Besides, since there is no "most of Germany" entry in the timezone db I'd guess someone already special-cased it in the code
Replies (1)
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@alfonsosiciliano@mastodon.bsd.cafe 2026-05-09 22:20
@goaserer@mastodontech.de I think the file is: https://github.com/eggert/tz/blob/main/backward It can be an interesting solution, I did not know the double timezone for Kyiv. Surely to evaluate in the future. @kirjoittaessani@norden.social pointed out an interesting case for keeping Busingen: "It can -- at least theoretically -- still be relevant: if you calculate time differences involving a date that falls inside the period where time differed from the rest of Germany, the result wouldn't be correct." Cit.