Time management

System time

$ timedatectl
               Local time: vr 2021-11-19 00:16:38 CET
           Universal time: do 2021-11-18 23:16:38 UTC
                 RTC time: do 2021-11-18 23:16:38
                Time zone: Europe/Amsterdam (CET, +0100)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no

$ timedatectl list-timezones | grep -i europe
Europe/Amsterdam
Europe/Andorra
Europe/Astrakhan
Europe/Athens
Europe/Belfast
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels

# timedatectl set-timezone Europe/Amsterdam

# timedatectl set-time 19:30

# timedatectl set-ntp true

Network time

# chronyc sources -v