From mboxrd@z Thu Jan  1 00:00:00 1970
From: Adam Mazurkiewicz <trzczy@gmail.com>
Subject: Re: Guixsd adds 2 hours to a BIOS time
Date: Fri, 24 May 2019 19:27:45 +0200
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=C5=9Br., 22 maj 2019 o 22:38 Tobias Geerinckx-Rice <me@tobias.gr> napisa=
=C5=82(a):
>
> Adam,
>
> Adam Mazurkiewicz wrote:
> > I live in Poland and I set time in config.scm in this way:
> > (...)
> > (operating-system
> >   (host-name "s")
> >   (timezone "Europe/Warsaw")
> >   (locale "en_US.utf8")
> >
> >   (keyboard-layout (keyboard-layout "pl"))
> > (...)
> > Then I changed Warsaw to Paris because both have the same
> > timezone and
> > DST (Daylight Saving Time).
> >
> > In both cases, Warsaw and Paris, Guixsd added two hours to the
> > time
> > that was set in computer BIOS. So the 'date' command in the
> > terminal
> > gave wrong time, to hours later.
>
> This all sounds very=E2=80=A6 correct, to be honest.
>
> Your =E2=80=98BIOS=E2=80=99 (hardware) clock should always be set to UTC,=
 not your
> local time.  Imagine your computer moving its CMOS clock forward &
> back twice a year.  Or every time you travel to a different
> timezone.  It would look as silly and confused as the rest of us.
>
> Put differently: the time displayed in your computer firmware's
> setup utility *should* be 2 hours behind your watch.  This is what
> all modern operating systems (even Windows, I've been told, if you
> ask it nicely) and other software expect.  It's not specific to
> Guix System=C2=B9.
>
> Judging by the fact that your e-mail arrived tomorrow, I'm
> guessing that's not currently the case.
You are right. I have always been setting CEST in BIOS but it has been
wrong. Thanks, for your great advice, Tobias.
>
> Kind regards,
>
> T G-R
>
> [1]: Previously known as =E2=80=98GuixSD=E2=80=99.
Kind regards,
Adam