The Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems.
The perimeter network device for each network in a cloudspace provides NTP. It is at x.x.x.254 on a given network. Upstream there may be some capture and redirect. Getting to an external time server directly may not be possible, however that should be transparent to your systems.
In the library of software applications there are also asset(s) to add to a system design which will configure a host to function as a NTP server within a cloudspace.