Re: [Bug] git log - reports wrong date and time

From: Junio C Hamano <gitster@pobox.com>
Date: Apr 2, 2019, 00:38 UTC
Message-ID: <xmqq7ecdutq2.fsf@gitster-ct.c.googlers.com>
In-Reply-To: <CAP5K-1YJN9jt_6yEbLs=ET6M2tRLMMoio65GJMsJy69Y+LCn1g@mail.gmail.com>

Chanseok Oh <chanseok@google.com> writes:

Show 5 quoted lines

> BROKEN: anything other than UTC reports wrong date.
>
>     $ TZ=KST git log '--date=format-local:%Y%m%d %H%M%S %z (%Z)'
> --format=%cd -n1
>     20190401 210250 +0000 (KST)

I think you are probably on a system where timezones can be given only with a more modern and unambiguous style and not in the potentially ambiguous abbreviated form. Here is one experiment to show what I mean:

    $ TZ=KST date
    Tue Apr  2 00:29:51 KST 2019
    $ TZ=JST date
    Tue Apr  2 00:29:51 JST 2019
    $ TZ=Asia/Tokyo date
    Tue Apr  2 09:29:51 JST 2019

Two points to be learned from the above exercise are:

 - It is not limited to your copy of "git".  Even a system supplied
   command like "date" does not work with "JST" but it can grok
   Asia/Tokyo just fine ("JST" does not necessarily have to be
   "Japan standard time"; it could be Jamaican ;-)).

 - It is not limited to KST (is that Kabul standard time?  Khartoum?
   Kinshasa?).

Perhaps try TZ=Asia/Seoul or something?