Making the locale time format more compact

dmesg -T gives human readable time format, and I want to make it more compact, from this [Пт мар 12 09:18:54 2021] wlan0: associated to this [12.03.21 09:18:54] wlan0: associated I'm using ru_RU.UTF-8 locale and the current date/time format looks like dmesg uses this locale settings too. So I have edited /usr/share/i18n/locales/ru_RU like this: date_fmt "%d.%m.%y %T" d_t_fmt "%d.%m.%y %T" d_fmt "%d.%m.%y" t_fmt "%T" But after locale-gen I don't see any differences in dmesg -T date/time format, it's still the same. Rebooting does not help too. The output of date command have changed how I wanted: root@PC1:~# date 12.03.21 09:42:17 I'd like to understand where dmesg gets settings for date/time format and how to change them. Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-14-amd64 I know about --time-format and all corresponding printf possibilities to change output of dmesg, but I want to have more compact date systemwide. I thought Linux has single point of locale settings, and I wonder why editing of locales do not do the trick with dmesg.