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Re: difference in seconds between two formatted dates ...

From <tomas@tuxteam.de>
Newsgroups linux.debian.user
Subject Re: difference in seconds between two formatted dates ...
Date 2023-12-20 14:40 +0100
Message-ID <HN4XL-eS0d-3@gated-at.bofh.it> (permalink)
References (5 earlier) <HMXWh-eNBt-9@gated-at.bofh.it> <HMZv4-eOmA-11@gated-at.bofh.it> <HN3Il-eR9R-3@gated-at.bofh.it> <HN41H-eRkp-1@gated-at.bofh.it> <HN4Ep-eRPP-3@gated-at.bofh.it>
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On Wed, Dec 20, 2023 at 01:12:35PM +0000, Albretch Mueller wrote:
> On 12/20/23, tomas@tuxteam.de <tomas@tuxteam.de> wrote:
> > On Wed, Dec 20, 2023 at 07:15:20AM -0500, Greg Wooledge wrote:
> >> On Wed, Dec 20, 2023 at 07:43:51AM +0000, Albretch Mueller wrote:
> >> >  I do see the good in what you are suggesting to me and I will have to
> >> > include time zones in the file names as well and deal with the
> >> > possible cases (someone working at Charles de Gaulle Airport in
> >> > Paris/France boards a plane to Boston Logan/MA/USA ...).
> >
> > How would this person's computer notice?
> 
>  The only way I see is for the running computer on "exposed mode" to
> check via systemd if the time zone has been changed and reset it in
> that case before you use date for file naming for all data that is
> kept in a measured way.

<irony>Lucky me, I'm still on SysV init</irony>

You still don't know how this timezone stuff works, do you?

Time zone is a *user* concept, not a *system* concept. The system
only knows about UNIX time, which is very close to UTC (but not
equal).

The only thing which might change your time "from the outside" is
ntp, to synchronize your clock (including the occasional leap second).

>  In the case of the person flying from Paris to Boston he will find
> out that he flew away from continental Europe once he reboots his
> computer in "exposed mode" (pun intended). He will notified of the
> time zone he had used before and all such deltas will be kept. The
> only measured data that will be deleted is the one which remains the
> same.

This is not how it works.

Cheers
-- 
t

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Thread

difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-17 11:20 +0100
  Re: difference in seconds between two formatted dates ... Andy Smith <andy@strugglers.net> - 2023-12-17 12:00 +0100
    Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-17 12:10 +0100
      Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-17 16:30 +0100
        Re: difference in seconds between two formatted dates ... "Andrew M.A. Cater" <amacater@einval.com> - 2023-12-17 17:00 +0100
        Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-17 17:10 +0100
        Re: difference in seconds between two formatted dates ... Andy Smith <andy@strugglers.net> - 2023-12-17 17:40 +0100
          Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-17 23:50 +0100
          Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-18 00:10 +0100
            Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-18 01:40 +0100
              Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-18 02:20 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-18 07:00 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-18 07:10 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-18 13:20 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-18 14:10 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-18 14:20 +0100
                date can't parse its own output was: difference in seconds between  two formatted dates ...) <tomas@tuxteam.de> - 2023-12-18 14:40 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-18 19:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-18 20:20 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-20 07:10 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-20 08:40 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-21 06:00 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-21 06:40 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-22 02:30 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-21 13:20 +0100
                RTC and (old) Windows [was: difference in seconds between two  formatted dates ...] <tomas@tuxteam.de> - 2023-12-21 13:30 +0100
                Re: RTC and (old) Windows [was: difference in seconds between two  formatted dates ...] David Christensen <dpchrist@holgerdanske.com> - 2023-12-21 23:30 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-22 02:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-22 04:10 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-20 08:50 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-20 13:20 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-20 13:40 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-20 14:20 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-20 14:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-20 16:10 +0100
                Re: difference in seconds between two formatted dates ... Nicolas George <george@nsup.org> - 2023-12-20 16:30 +0100
                systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) Max Nikulin <manikulin@gmail.com> - 2023-12-21 04:50 +0100
                Re: systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) <tomas@tuxteam.de> - 2023-12-21 07:00 +0100
                Re: systemd and timezone Max Nikulin <manikulin@gmail.com> - 2023-12-21 17:10 +0100
                Re: systemd and timezone Nicholas Geovanis <nickgeovanis@gmail.com> - 2023-12-22 02:00 +0100
                Re: systemd and timezone Andy Smith <andy@strugglers.net> - 2023-12-22 13:50 +0100
                Re: systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) Jeffrey Walton <noloader@gmail.com> - 2023-12-21 17:30 +0100
                Re: systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) tomas@tuxteam.de - 2023-12-21 18:40 +0100
                Re: systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) Dan Ritter <dsr@randomstring.org> - 2023-12-21 15:30 +0100
                Re: systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) <tomas@tuxteam.de> - 2023-12-21 16:10 +0100
                Re: systemd and timezone (was: Re: difference in seconds between two  formatted dates ...) Nicolas George <george@nsup.org> - 2023-12-21 23:00 +0100
                Re: systemd and timezone gene heskett <gheskett@shentel.net> - 2023-12-22 01:00 +0100
                Re: systemd and timezone Max Nikulin <manikulin@gmail.com> - 2023-12-22 13:50 +0100
                Re: systemd and timezone <tomas@tuxteam.de> - 2023-12-22 14:40 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2023-12-22 15:20 +0100
                Re: systemd and timezone David Wright <deblis@lionunicorn.co.uk> - 2023-12-22 16:50 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2023-12-22 17:30 +0100
                Re: systemd and timezone "Arno Lehmann, ITS" <al@its-lehmann.de> - 2023-12-22 20:20 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2023-12-22 21:00 +0100
                Re: systemd and timezone David Wright <deblis@lionunicorn.co.uk> - 2023-12-22 20:50 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2023-12-22 21:20 +0100
                Re: systemd and timezone David Wright <deblis@lionunicorn.co.uk> - 2023-12-23 07:20 +0100
                Re: systemd and timezone Sven Joachim <svenjoac@gmx.de> - 2023-12-22 21:20 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2023-12-22 22:40 +0100
                Re: systemd and timezone David Wright <deblis@lionunicorn.co.uk> - 2023-12-23 00:30 +0100
                Re: systemd and timezone Pocket <pocket@columbus.rr.com> - 2023-12-23 00:50 +0100
                Re: systemd and timezone Pocket <pocket@columbus.rr.com> - 2023-12-23 01:10 +0100
                Re: systemd and timezone David Wright <deblis@lionunicorn.co.uk> - 2023-12-23 07:20 +0100
                Re: Support for SysV service scripts deprecated in systemd 255 (was:  systemd and timezone) Felix Miata <mrmazda@earthlink.net> - 2023-12-23 08:10 +0100
                Re: systemd and timezone Pocket <pocket@columbus.rr.com> - 2023-12-23 12:10 +0100
                Re: systemd and timezone Nate Bargmann <n0nb@n0nb.us> - 2023-12-23 02:00 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2023-12-23 02:20 +0100
                Re: systemd and timezone <tomas@tuxteam.de> - 2023-12-22 17:10 +0100
                Re: systemd and timezone Jeffrey Walton <noloader@gmail.com> - 2023-12-22 21:00 +0100
                Re: systemd and timezone Nicolas George <george@nsup.org> - 2023-12-22 23:40 +0100
                Re: systemd and timezone Charles Kroeger <mbone@gmx.co.uk> - 2024-01-06 03:30 +0100
                Re: systemd and timezone Greg Wooledge <greg@wooledge.org> - 2024-01-06 05:30 +0100
                Re: systemd and timezone gene heskett <gheskett@shentel.net> - 2024-01-06 06:40 +0100
                tzdata-legacy [was: Re: systemd and timezone] Max Nikulin <manikulin@gmail.com> - 2024-01-06 07:20 +0100
                Re: tzdata-legacy [was: Re: systemd and timezone] Max Nikulin <manikulin@gmail.com> - 2024-01-06 08:10 +0100
                Re: tzdata-legacy [was: Re: systemd and timezone] Nate Bargmann <n0nb@n0nb.us> - 2024-01-06 10:20 +0100
                Re: tzdata-legacy [was: Re: systemd and timezone] gene heskett <gheskett@shentel.net> - 2024-01-06 13:10 +0100
                Re: tzdata-legacy [was: Re: systemd and timezone] Greg Wooledge <greg@wooledge.org> - 2024-01-06 16:10 +0100
                Re: tzdata-legacy [was: Re: systemd and timezone] David Wright <deblis@lionunicorn.co.uk> - 2024-01-07 18:30 +0100
                was: Re: tzdata-legacy [was: Re: systemd and timezone] gene heskett <gheskett@shentel.net> - 2024-01-06 13:00 +0100
                Re: was: Re: tzdata-legacy [was: Re: systemd and timezone] John Hasler <john@sugarbit.com> - 2024-01-06 15:30 +0100
                SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re: systemd and  timezone] gene heskett <gheskett@shentel.net> - 2024-01-06 20:10 +0100
                Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re: systemd  and timezone] John Hasler <john@sugarbit.com> - 2024-01-06 20:40 +0100
                Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re: systemdand  timezone] gene heskett <gheskett@shentel.net> - 2024-01-06 21:40 +0100
                Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re: systemdand  timezone] Nate Bargmann <n0nb@n0nb.us> - 2024-01-06 23:10 +0100
                Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re: systemdand  timezone] Greg Wooledge <greg@wooledge.org> - 2024-01-07 01:10 +0100
                Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re:  systemdandtimezone] gene heskett <gheskett@shentel.net> - 2024-01-07 05:30 +0100
                Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy [was: Re:  systemdandtimezone] Nate Bargmann <n0nb@n0nb.us> - 2024-01-07 12:30 +0100
                Re: SOLVED FOR GENE Felix Miata <mrmazda@earthlink.net> - 2024-01-07 12:40 +0100
                Re: SOLVED FOR GENE jeremy ardley <jeremy.ardley@gmail.com> - 2024-01-07 13:10 +0100
                Re: SOLVED FOR GENE john doe <johndoe65534@mail.com> - 2024-01-07 13:40 +0100
                Re: SOLVED FOR GENE Michael Stone <mstone@debian.org> - 2024-01-11 14:30 +0100
                Re: SOLVED FOR GENE Felix Miata <mrmazda@earthlink.net> - 2024-01-11 18:10 +0100
                manpages package [WAS Re: SOLVED FOR GENE:Re: was: Re: tzdata-legacy  [was: Re: systemd and timezone] "Andrew M.A. Cater" <amacater@einval.com> - 2024-01-06 23:50 +0100
                Re: was: Re: tzdata-legacy [was: Re: systemd and timezone] Max Nikulin <manikulin@gmail.com> - 2024-01-06 18:10 +0100
                Re: was: Re: tzdata-legacy [was: Re: systemd and timezone] gene heskett <gheskett@shentel.net> - 2024-01-06 20:40 +0100
                systemd-timesyncd Max Nikulin <manikulin@gmail.com> - 2024-01-07 16:50 +0100
                Re: systemd-timesyncd John Hasler <john@sugarbit.com> - 2024-01-07 17:30 +0100
                Re: systemd-timesyncd gene heskett <gheskett@shentel.net> - 2024-01-07 21:20 +0100
                Re: systemd-timesyncd Charles Kroeger <mbone@gmx.co.uk> - 2024-01-08 06:50 +0100
                Re: systemd-timesyncd gene heskett <gheskett@shentel.net> - 2024-01-07 21:10 +0100
                Re: systemd-timesyncd "Andrew M.A. Cater" <amacater@einval.com> - 2024-01-07 22:00 +0100
                Re: systemd-timesyncd Charles Curley <charlescurley@charlescurley.com> - 2024-01-08 00:00 +0100
                Re: systemd-timesyncd Nicholas Geovanis <nickgeovanis@gmail.com> - 2024-01-08 01:40 +0100
                VAX emulation/simulation (was Re: systemd-timesyncd) The Wanderer <wanderer@fastmail.fm> - 2024-01-08 02:10 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) Bret Busby <bret@busby.net> - 2024-01-08 10:40 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) "Jeremy Nicoll" <jn.ml.dbi.73@letterboxes.org> - 2024-01-08 11:40 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-08 13:20 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) Nicholas Geovanis <nickgeovanis@gmail.com> - 2024-01-09 01:00 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-09 09:20 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) Bret Busby <bret@busby.net> - 2024-01-09 10:40 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-09 11:20 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) Nicolas George <george@nsup.org> - 2024-01-09 11:40 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) gene heskett <gheskett@shentel.net> - 2024-01-09 12:30 +0100
                Re: VAX emulation/simulation (was Re: systemd-timesyncd) "Niall O'Reilly" <niall+lists@no8.be> - 2024-01-08 21:50 +0100
                Re: systemd-timesyncd gene heskett <gheskett@shentel.net> - 2024-01-08 16:00 +0100
                Re: systemd-timesyncd gene heskett <gheskett@shentel.net> - 2024-01-08 16:00 +0100
                Re: systemd-timesyncd Max Nikulin <manikulin@gmail.com> - 2024-01-08 04:40 +0100
                Re: systemd-timesyncd Curt <curty@free.fr> - 2024-01-08 18:00 +0100
                Re: systemd-timesyncd Max Nikulin <manikulin@gmail.com> - 2024-01-08 04:20 +0100
                Re: systemd-timesyncd Charles Curley <charlescurley@charlescurley.com> - 2024-01-08 05:10 +0100
                Re: systemd-timesyncd Mark Fletcher <mark27q1@gmail.com> - 2024-01-08 14:50 +0100
                mktime (was: Re: systemd and timezone) Max Nikulin <manikulin@gmail.com> - 2023-12-23 18:00 +0100
                Re: mktime (was: Re: systemd and timezone) Jeffrey Walton <noloader@gmail.com> - 2023-12-23 19:30 +0100
                Re: mktime Max Nikulin <manikulin@gmail.com> - 2023-12-24 03:40 +0100
                Re: mktime (was: Re: systemd and timezone) <tomas@tuxteam.de> - 2023-12-24 08:40 +0100
                Re: mktime Max Nikulin <manikulin@gmail.com> - 2023-12-28 03:40 +0100
                Re: systemd and timezone Max Nikulin <manikulin@gmail.com> - 2023-12-21 16:30 +0100
                Re: difference in seconds between two formatted dates ... Max Nikulin <manikulin@gmail.com> - 2023-12-22 03:20 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-22 08:00 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-21 05:40 +0100
                Re: difference in seconds between two formatted dates ... Max Nikulin <manikulin@gmail.com> - 2023-12-21 06:50 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-21 07:10 +0100
                Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-21 08:10 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-21 13:40 +0100
                Re: difference in seconds between two formatted dates ... Max Nikulin <manikulin@gmail.com> - 2023-12-21 16:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-21 19:30 +0100
                Re: difference in seconds between two formatted dates ... gene heskett <gheskett@shentel.net> - 2023-12-21 21:00 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-21 21:10 +0100
                Re: difference in seconds between two formatted dates ... gene heskett <gheskett@shentel.net> - 2023-12-21 21:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-21 22:40 +0100
                Re: difference in seconds between two formatted dates ... gene heskett <gheskett@shentel.net> - 2023-12-22 00:40 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-25 16:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-25 18:40 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-26 08:00 +0100
                Re: difference in seconds between two formatted dates ... "Thomas Schmitt" <scdbackup@gmx.net> - 2023-12-26 08:30 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-26 16:00 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-26 16:40 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-26 19:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-26 22:40 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-27 01:40 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-27 01:50 +0100
                When strace breaks process or is blocked (was: Re: difference in  seconds between two formatted dates ...) Max Nikulin <manikulin@gmail.com> - 2023-12-27 17:50 +0100
            Re: difference in seconds between two formatted dates ... Max Nikulin <manikulin@gmail.com> - 2023-12-18 03:30 +0100
              Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-25 00:10 +0100
                Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-25 01:10 +0100
                Re: difference in seconds between two formatted dates ... Albretch Mueller <lbrtchx@gmail.com> - 2023-12-25 01:30 +0100
                Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-25 02:20 +0100
                Re: difference in seconds between two formatted dates ... "Andrew M.A. Cater" <amacater@einval.com> - 2023-12-25 11:40 +0100
                Re: difference in seconds between two formatted dates ... Tixy <tixy@yxit.co.uk> - 2023-12-25 09:10 +0100
                Re: difference in seconds between two formatted dates ... Andy Smith <andy@strugglers.net> - 2023-12-27 00:00 +0100
        Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-17 19:00 +0100
        Re: difference in seconds between two formatted dates ... David Wright <deblis@lionunicorn.co.uk> - 2023-12-17 19:30 +0100
    Re: difference in seconds between two formatted dates ... Teemu Likonen <tlikonen@iki.fi> - 2023-12-17 12:50 +0100
  Re: difference in seconds between two formatted dates ... <tomas@tuxteam.de> - 2023-12-17 12:10 +0100
  Re: difference in seconds between two formatted dates ... Greg Wooledge <greg@wooledge.org> - 2023-12-17 15:10 +0100

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