timedatectl

timedatectl [OPTIONS...] COMMAND ...

Query or change system time and date settings.

  -h --help                Show this help message
     --version             Show package version
     --no-pager            Do not pipe output into a pager
     --no-ask-password     Do not prompt for password
  -H --host=[USER@]HOST    Operate on remote host
  -M --machine=CONTAINER   Operate on local container
     --adjust-system-clock Adjust system clock when changing local RTC mode
     --monitor             Monitor status of systemd-timesyncd
  -p --property=NAME       Show only properties by this name
  -a --all                 Show all properties, including empty ones
     --value               When showing properties, only print the value

Commands:
  status                   Show current time settings
  show                     Show properties of systemd-timedated
  set-time TIME            Set system time
  set-timezone ZONE        Set system time zone
  list-timezones           Show known time zones
  set-local-rtc BOOL       Control whether RTC is in local time
  set-ntp BOOL             Enable or disable network time synchronization

systemd-timesyncd Commands:
  timesync-status          Show status of systemd-timesyncd
  show-timesync            Show properties of systemd-timesyncd

See the timedatectl(1) man page for details.

$ timedatectl

               Local time: do 2020-04-30 15:12:31 CEST
           Universal time: do 2020-04-30 13:12:31 UTC
                 RTC time: do 2020-04-30 15:12:31
                Time zone: Europe/Amsterdam (CEST, +0200)
System clock synchronized: yes
              NTP service: inactive
          RTC in local TZ: yes

$ timedatectl list-timezones

Africa/Abidjan
Africa/Accra
Africa/Algiers

sudo timedatectl set-timezone Europe/Amsterdam

sudo timedatectl set-ntp 0

sudo timedatectl set-ntp 1

sudo timedatectl set-time '2021-08-31 14:25'

timedatectl timesync-status