From: Tom Lane <tgl@sss.pgh.pa.us>
To: Nacho Caballero <nachocab@gmail.com>
Cc: pgsql-bugs@lists.postgresql.org
Subject: Re: Bug in tzdata 2022g
Date: Sat, 06 May 2023 10:50:25 -0400
Message-ID: <3940204.1683384625@sss.pgh.pa.us> (raw)
In-Reply-To: <CAF1W7uz4HcZkuo-c03F0siFQv951rosV79ahi5K4QPmc7f4KJw@mail.gmail.com>
References: <CAF1W7uz4HcZkuo-c03F0siFQv951rosV79ahi5K4QPmc7f4KJw@mail.gmail.com>
Nacho Caballero <nachocab@gmail.com> writes:
> There appears to be a bug in the latest postgres release, which uses tzdata
> 2022g to reflect the recent DST change in Mexico.
I see no bug here. America/Mexico_City is reported as being -06
all year round, which agrees with what the tzdb commentary says:
# From Paul Eggert (2022-10-28):
# The new Mexican law was published today:
# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022
# This abolishes DST except where US DST rules are observed,
# and in addition changes all of Chihuahua to -06 with no DST.
Meanwhile, Bogota has been -05 year-round since the nineties.
If you disagree with either of these conclusions, you had better
provide some solid evidence to back it up; and the place to be
complaining to is the tzdata maintainers, not us.
> However, when I run it in PostgreSQL 12.10 (Ubuntu 12.10-1.pgdg20.04+1), I
> get the right answer (no time difference):
Apparently, your PG 12.10 installation is using some pre-2022f
version of tzdata. Mexico didn't abolish DST until late last year.
regards, tom lane
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Cc: tgl@sss.pgh.pa.us, nachocab@gmail.com, pgsql-bugs@lists.postgresql.org
Subject: Re: Bug in tzdata 2022g
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