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Groups > comp.os.linux.misc > #75430
| From | "Carlos E.R." <robin_listas@es.invalid> |
|---|---|
| Newsgroups | comp.os.linux.misc |
| Subject | Re: Date formatting. |
| Date | 2025-09-29 21:52 +0200 |
| Message-ID | <5k4rqlxn6f.ln2@Telcontar.valinor> (permalink) |
| References | (15 earlier) <20250929091131.00000dc4@gmail.com> <FIyCQ.112782$DQYd.18287@fx16.iad> <jvqqqlxnbk.ln2@Telcontar.valinor> <10befmu$33rad$1@dont-email.me> <10benah$37ddd$5@dont-email.me> |
On 2025-09-29 21:40, Lawrence D’Oliveiro wrote: > On Mon, 29 Sep 2025 18:30:06 +0100, Pancho wrote: > >> I like YYYYMMDD too, but the real epiphany moment for me was when I >> realised that all dates should be handled internally UTC, Unix time, >> and that output format, display, is just a user preference. > > As far as I can tell, it was Unix that pioneered the idea of maintaining > system time as UTC (actually GMT in the early days), and converting back > and forth as necessary for human interpretation. Other systems continued > to resist the idea for decades afterwards. Windows still doesn’t do it > today. macOS --- who can tell? Windows has a registry boolean option to store the CMOS time as UTC. I have no idea if this also means internally. > >> It is so obvious, and yet I worked on so many systems that messed up >> date conversions/different time zones. > > All too common, on systems like Microsoft Windows that maintain system > time as local time, to forget that they have done the daylight-saving > switch once, and do it a second time. That kind of bug can’t happen when > system time is maintained as UTC. > > There is an article on Bitsavers which mentions that IBM mainframes needed > to be rebooted to switch daylight saving on and off. -- Cheers, Carlos. ES🇪🇸, EU🇪🇺;
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Re: Favorite Font Ethan Carter <ec1828@somewhere.edu> - 2025-09-19 19:16 -0300
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-20 00:33 +0000
Re: Favorite Font Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-09-20 08:58 -0400
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-20 16:08 +0100
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Re: Favorite Font Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-09-23 00:07 +0000
Re: Favorite Font "Carlos E.R." <robin_listas@es.invalid> - 2025-09-23 10:00 +0200
Re: Favorite Font rbowman <bowman@montana.com> - 2025-09-23 18:45 +0000
Re: Favorite Font "Carlos E.R." <robin_listas@es.invalid> - 2025-09-23 22:10 +0200
Re: Favorite Font Robert Riches <spamtrap42@jacob21819.net> - 2025-09-23 03:36 +0000
Re: Favorite Font rbowman <bowman@montana.com> - 2025-09-23 18:42 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-23 12:31 +0100
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-20 15:13 +0000
Re: Favorite Font Farley Flud <ff@linux.rocks> - 2025-09-20 15:51 +0000
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-20 18:02 +0000
Re: Favorite Font Farley Flud <ff@linux.rocks> - 2025-09-20 18:42 +0000
Re: Favorite Font Jan Panteltje <alien@comet.invalid> - 2025-09-21 08:21 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-21 10:34 +0100
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-21 22:53 +0000
Re: Favorite Font Jan Panteltje <alien@comet.invalid> - 2025-09-22 07:42 +0000
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-22 22:53 +0000
Re: Favorite Font Jan Panteltje <alien@comet.invalid> - 2025-09-23 07:35 +0000
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-21 15:26 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-21 18:57 +0100
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-21 22:53 +0000
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-21 22:52 +0000
Re: Favorite Font Jan Panteltje <alien@comet.invalid> - 2025-09-22 07:32 +0000
Re: Favorite Font Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-09-22 17:22 +0000
Re: Favorite Font Jan Panteltje <alien@comet.invalid> - 2025-09-22 18:36 +0000
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-21 14:59 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-21 16:15 +0100
Re: Favorite Font Farley Flud <ff@linux.rocks> - 2025-09-21 20:19 +0000
Re: Favorite Font pothead <pothead@snakebite.com> - 2025-09-23 01:16 +0000
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-27 14:44 +0000
Re: Favorite Font Farley Flud <fflud@gnu.rocks> - 2025-09-27 15:22 +0000
Re: Favorite Font Nuno Silva <nunojsilva@invalid.invalid> - 2025-09-28 11:15 +0100
Re: Favorite Font Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-09-28 14:03 -0700
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-28 22:51 +0000
Re: Favorite Font candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-09-30 18:30 +0000
Re: Favorite Font Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-09-30 11:45 -0700
Re: Favorite Font rbowman <bowman@montana.com> - 2025-09-30 20:04 +0000
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-30 22:46 +0000
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-10-04 09:31 +0000
Re: Favorite Font Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2025-10-04 10:08 -0700
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-10-04 21:10 +0000
Re: Favorite Font John Ames <commodorejohn@gmail.com> - 2025-09-29 09:11 -0700
Re: Favorite Font Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-09-29 16:45 +0000
Date formatting. "Carlos E.R." <robin_listas@es.invalid> - 2025-09-29 19:07 +0200
Re: Date formatting. Pancho <Pancho.Jones@protonmail.com> - 2025-09-29 18:30 +0100
Re: Date formatting. Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-29 19:40 +0000
Re: Date formatting. "Carlos E.R." <robin_listas@es.invalid> - 2025-09-29 21:52 +0200
Re: Date formatting. "Carlos E.R." <robin_listas@es.invalid> - 2025-09-29 21:45 +0200
Re: Date formatting. rbowman <bowman@montana.com> - 2025-09-30 02:08 +0000
Re: Date formatting. c186282 <c186282@nnada.net> - 2025-09-29 23:15 -0400
Re: Favorite Font rbowman <bowman@montana.com> - 2025-09-29 18:55 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-20 16:59 +0100
Re: Favorite Font Richard Kettlewell <invalid@invalid.invalid> - 2025-09-20 18:48 +0100
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-20 18:39 +0000
Re: Favorite Font not@telling.you.invalid (Computer Nerd Kev) - 2025-09-21 09:27 +1000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-21 09:45 +0100
Re: Favorite Font Stéphane CARPENTIER <sc@fiat-linux.fr> - 2025-09-20 18:18 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-21 09:34 +0100
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-21 23:02 +0000
Re: Favorite Font chrisv <chrisv@nospam.invalid> - 2025-09-21 09:02 -0500
Re: Favorite Font Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-21 01:39 +0000
Re: Favorite Font vallor <vallor@cultnix.org> - 2025-09-21 07:20 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-21 10:14 +0100
Re: Favorite Font vallor <vallor@cultnix.org> - 2025-09-21 22:31 +0000
Re: Favorite Font The Natural Philosopher <tnp@invalid.invalid> - 2025-09-22 13:34 +0100
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