On the freshly installed Leap 15.6 on my laptop where the HW clock is running on UTC: [sh @ uruk] ~ 7 % cat /etc/sysconfig/clock DEFAULT_TIMEZONE="US/Eastern" [sh @ uruk] ~ 8 % timedatectl Local time: Mo 2024-07-01 14:01:14 CEST Universal time: Mo 2024-07-01 12:01:14 UTC RTC time: Mo 2024-07-01 12:01:14 Time zone: Europe/Berlin (CEST, +0200) System clock synchronized: yes NTP service: active RTC in local TZ: no [sh @ uruk] ~ 9 % TZ=UTC sudo hwclock 2024-07-01 12:01:23.208051+00:00 [sh @ uruk] ~ 10 % date Mo 1. Jul 14:01:30 CEST 2024 The default "US/Eastern" is what I always get (to my great annoyance) as the default during installation when prompted for my time zone. This is defined by the release manager in the product's control.xml file. The /etc/sysconfig/clock file is not owned by any package, so it should normally be generated by a fillup template, but I can't find that template in /usr/share/fillup-templates on that system or on my Leap 15.5.