The RedIRIS time synchronisation service is responsible for setting all the devices connected to the network to the same time; this makes it easier to run certain applications, guarantees the performance quality parameters on the network are measured correctly, incident management, etc.

In order to guarantee the highest level of accuracy in synchronising all the devices, the NTP (Network Time Protocol) protocol is used from the time station (hora.rediris.es) synchronising with GPS receivers and with the standards of the Real Observatorio de la Armada (ROA).