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Re: differences between hwclock <-> date due to time zone issues? ...

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On Fri 24 Mar 2023 at 17:13:31 (+0000), Albretch Mueller wrote:
> On 3/24/23, Andy Smith <andy@strugglers.net> wrote:
> > As already pointed out, the hardware clock is used in very limited
> > ways and is not the same thing as the system clock, so your result
> > is as expected.
> > What are you actually trying to do?
> >
> > What "time zone issues" do you refer to?
> 
>  I should have pointed out that I always go into exposed mode (use the
> Internet) with a live DVD. My laptop was always 6 hours ahead and now
> that they changed to summer time, it is 5 hours ahead.
>  I used logs which names a time a la:
> 
> _DT=$(date +%Y%m%d%H%M%S)
> _BN=$(basename "${_SDIR}")
> _LOG_FL="${_BN}_${_DT}.log"
> ...
>  If anything, timing is one of the aspects of reality which should be
> coordinated.

Hence the existence of UTC since around 1960: Coordinated Universal Time.

But to benefit from it, you also have to coordinate your computers
/and/ their OSes. I can't imagine trying to run a laptop with its RTC
on Local time, because of time zone changes when travelling. I suppose
it's just about possible to manage it on a desktop computer in Arizona.

Like Greg, I've not used Live systems to any extent, and don't know
how they handle setting a time zone.

BTW I've only really trusted reading or setting the RTC by means of
the CMOS screens, and treat it as a one-time only process (upon
acquisition), assuming the coin-cell battery never needs replacing.
(All my computers have begun life running Windows.)

Cheers,
David.

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Thread

differences between hwclock <-> date due to time zone issues? ... Albretch Mueller <lbrtchx@gmail.com> - 2023-03-23 22:50 +0100
  Re: differences between hwclock <-> date due to time zone issues? ... Stefan Monnier <monnier@iro.umontreal.ca> - 2023-03-23 23:10 +0100
  Re: differences between hwclock <-> date due to time zone issues? ... Cindy Sue Causey <butterflybytes@gmail.com> - 2023-03-23 23:10 +0100
    Re: differences between hwclock <-> date due to time zone issues? ... Cindy Sue Causey <butterflybytes@gmail.com> - 2023-03-23 23:30 +0100
  Re: differences between hwclock <-> date due to time zone issues? ... David Wright <deblis@lionunicorn.co.uk> - 2023-03-23 23:50 +0100
  Re: differences between hwclock <-> date due to time zone issues? ... Andy Smith <andy@strugglers.net> - 2023-03-24 15:50 +0100
    Re: differences between hwclock <-> date due to time zone issues? ... Albretch Mueller <lbrtchx@gmail.com> - 2023-03-24 18:20 +0100
      Re: differences between hwclock <-> date due to time zone issues? ... Greg Wooledge <greg@wooledge.org> - 2023-03-24 22:50 +0100
        Re: differences between hwclock <-> date due to time zone issues? ... Stefan Monnier <monnier@iro.umontreal.ca> - 2023-03-24 23:00 +0100
          Re: differences between hwclock <-> date due to time zone issues? ... Greg Wooledge <greg@wooledge.org> - 2023-03-24 23:10 +0100
            Re: differences between hwclock <-> date due to time zone issues? ... Stefan Monnier <monnier@iro.umontreal.ca> - 2023-03-25 00:20 +0100
              Re: differences between hwclock <-> date due to time zone issues? ... Albretch Mueller <lbrtchx@gmail.com> - 2023-03-25 01:10 +0100
                Re: differences between hwclock <-> date due to time zone issues? ... Max Nikulin <manikulin@gmail.com> - 2023-03-25 04:20 +0100
                Re: differences between hwclock <-> date due to time zone issues? ... Albretch Mueller <lbrtchx@gmail.com> - 2023-03-25 04:50 +0100
                Re: differences between hwclock <-> date due to time zone issues? ... Max Nikulin <manikulin@gmail.com> - 2023-03-25 06:00 +0100
                Re: differences between hwclock <-> date due to time zone issues? ... Max Nikulin <manikulin@gmail.com> - 2023-03-25 09:00 +0100
              Re: differences between hwclock <-> date due to time zone issues? ... David Wright <deblis@lionunicorn.co.uk> - 2023-03-25 05:30 +0100
      Re: differences between hwclock <-> date due to time zone issues? ... David Wright <deblis@lionunicorn.co.uk> - 2023-03-25 05:30 +0100
        Re: differences between hwclock <-> date due to time zone issues? ... Felix Miata <mrmazda@earthlink.net> - 2023-03-25 05:50 +0100

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