The internal clock of the router should always be set correctly to ensure that time-controlled events are processed precisely to the desired time, system messages are dated correctly and certificates are within their validity period. A regular synchronisation with an NTP (Network Time Protocol) server is recommended for this. This can be achieved using the action Synchronise clock via NTP. The action will be triggered by a regular event, such as the expiration of a timer or the condition change of an interface.
The startup wizard makes all necessary settings that the time is always synchronised when the respective WAN chain went online. A manual configuration is described here.