Re: %z and %Z in strftime man page require clarification

[Alex Colomar <alx.manpages@gmail.com>]

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Hi Almaz,

On 2/24/23 17:40, Almaz Mingaleev wrote:
> I've started a new thread, but can't see it in the mailing list archives.
> Please see the patch attached.

Thanks!

Could you please send the patch inline (if you use git-format-patch(1), 
that would be --no-attach (or --inline, but I prefer --no-attach)), so I 
can quote reply on it?

If you fear that your mailer will do harmful stuff, please send it both 
attached and inline.

Cheers,

Alex

> 
> 
> On Wed, 15 Feb 2023 at 17:34, Almaz Mingaleev <mingaleev@google.com> wrote:
>>
>> Hi Alex,
>>
>> Patch is somewhat ready, I will send it once a teammate reviews it.
>> Should be ready by tomorrow.
>>
>> I'd definitely appreciate if Paul checks it too :)
>>
>>
>> On Wed, 15 Feb 2023 at 17:21, Alejandro Colomar <alx.manpages@gmail.com> wrote:
>>>
>>> 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@google.com> wrote:
>>>>>
>>>>> Friendly ping.
>>>>>
>>>>>
>>>>> On Thu, 28 Jul 2022 at 09:16, Almaz Mingaleev <mingaleev@google.com> 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

-- 
<http://www.alejandro-colomar.es/>
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