Package chrony

An NTP client/server

https://chrony.tuxfamily.org

chrony is a versatile implementation of the Network Time Protocol (NTP).
It can synchronise the system clock with NTP servers, reference clocks
(e.g. GPS receiver), and manual input using wristwatch and keyboard. It
can also operate as an NTPv4 (RFC 5905) server and peer to provide a time
service to other computers in the network.
General Commands
Command Description
chronyc command-line interface for chrony daemon
File Formats
File Description
chrony.conf chronyd configuration file
System Administration
Command Description
chronyd chrony daemon