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Date: Tue, 14 Oct 2008 14:46:23 -0400
From: "Mark B." <mkbucc@gmail.com>
To: "Jeremy Chadwick" <koitsu@freebsd.org>
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Cc: freebsd-questions@freebsd.org
Subject: Re: mktime() output not the same as the date utility
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On Tue, Oct 14, 2008 at 1:50 PM, Jeremy Chadwick <koitsu@freebsd.org> wrote:
> On Tue, Oct 14, 2008 at 12:43:54PM -0400, Mark B. wrote:
>> I can't figure out from the man pages why
>> mktime() is giving a different result than date -f.
>> Both strptime and mktime are supposed to use the
>> local timezone, as does date.
>>
>> The output of date is correct; mktime() is an hour later.
>>
>> What am I missing here?
>
> I'm betting it's due to DST
>

Yes, set tm_isdst to -1 before calling mktime() and then my
test program works as expected.

Thanks,

m