kazulog@sv1:~$ sudo timedatectl set-timezone UTC
kazulog@sv1:~$ date
Thu Sep 10 23:24:17 UTC 2026
kazulog@sv1:~$ sudo timedatectl set-timezone Asia/Tokyo
kazulog@sv1:~$ date
Fri Sep 11 08:24:17 JST 2026
kazulog@sv1:~$ timedatectl show
Timezone=Asia/Tokyo
LocalRTC=no
CanNTP=yes
NTP=yes
NTPSynchronized=yes
TimeUSec=Fri 2026-09-11 08:24:17 JST
RTCTimeUSec=Fri 2026-09-11 08:24:17 JST