Hi Elliott, Almaz, On 2/13/23 17:31, enh wrote: > (given how complex a topic this is -- based on the discussion on the > tz mailing list -- you might want to send a specific suggestion in the > form of a patch...) Thanks, I agree. This is too complex, and it would be nice to see a more specific suggestion in the form of a patch. I CCed Paul, in case he can help. Cheers, Alex > > On Mon, Feb 13, 2023 at 1:15 AM Almaz Mingaleev <mingaleev@xxxxxxxxxx> wrote: >> >> Friendly ping. >> >> >> On Thu, 28 Jul 2022 at 09:16, Almaz Mingaleev <mingaleev@xxxxxxxxxx> wrote: >>> >>> Hi Michael, >>> Current strftime specification in C language standard is not accurate. >>> It tells that tm_isdst is enough to find out time zone's offset. But >>> that's not true, for example Europe/Lisbon has changed [0] its >>> standard offset from 00:00 to 01:00 and back to 00:00, so an exact >>> date is needed to answer that. >>> >>> To get correct answer with the current glibc tm struct should either >>> come from localtime or there should be a mktime call prior to >>> strftime. You can find a repro example and discussion here [1]. Paul >>> Eggert has proposed a fix to C standard [2]. >>> >>> Should man pages reflect that i.e. mention that there should be >>> localtime/mktime calls for %z and %Z? >>> >>> Thanks, >>> Almaz >>> >>> P.S. I am resending the email. My previous attempt was bounced back as >>> it wasn't TEXT/PLAIN. >>> >>> [0] https://github.com/eggert/tz/blob/a249a0c64b2f87a24c7f1aab43056fb597c95b96/europe#L2400 >>> [1] https://mm.icann.org/pipermail/tz/2022-July/031668.html >>> [2] https://mm.icann.org/pipermail/tz/2022-July/031674.html -- <http://www.alejandro-colomar.es/> GPG key fingerprint: A9348594CE31283A826FBDD8D57633D441E25BB5
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