timedatectl set-timezone Europe/Zurich
timedatectl

vi /etc/systemd/timesyncd.conf

[Time]
NTP=ntp.fortier-family.com

timedatectl set-ntp true
timedatectl status
systemctl restart systemd-timesyncd
timedatectl show-timesync

apt install ntpdate
ntpdate pool.ntp.org