On Wed, Apr 29, 2020 at 09:11:05AM +0300, Reco wrote: > If you need it systemwide, consider doing this (will require relogin, at > least): > > echo 'LC_TIME=C' >> /etc/default/locale
I do not recommend hard-coding locales system-wide. Individual users should be free to set their own environments. > If you need it for your user only (will require a new terminal emulator), > > echo 'LC_TIME=C' >> ~/.bashrc You'll need to export it, in order for it have any effect on external commands (like date). The choice of .bashrc may be fine for GNOME users (hell, it may even be *mandatory* for GNOME users, because GNOME is user-unfriendly shit), but even then, it only affects commands that are launched from an interactive shell. In order to take effect in commands that are launched by the window manager, or whatever, environment changes should be done much earlier in the session. For shell logins, you would want to put the command(s) in ~/.profile or whatever your login shell's equivalent dot file is. For GUI logins that are not GNOME, you can try setting up the environment in ~/.xsessionrc -- but note that your Desktop Environment (even if it's not GNOME) may overwrite whatever you try to set. If it's GNOME, well, you're screwed. GNOME has its own idea of how to set up the user's locale, and it does not include such subtle concepts as "use one locale for most things, but fine-tune LC_COLLATE and LC_TIME". This has come up in the past on this mailing list, and there is no known solution to it (other than "don't use GNOME"). The last time the "date in buster" issue came up, I experimented with a customized locale -- see my write-up at <https://www.mail-archive.com/debian-user@lists.debian.org/msg741047.html> or whatever list archive Google happens to choose for you. Since that time, I abandoned that approach. It's too clunky in real life -- too much trouble, too many opportunities for something to go wrong, e.g. the environment variable doesn't get set where it needs to be set, or *does* get set where it shouldn't, like inside a chroot or similar encapsulation. I just went with the LC_TIME=C approach instead.
