The G52S sets its time (RTC clock) using a combination of GPS time and Server time. If the GPS time is available, it sets the clock from there. This is favored as it is usually more accurate. If the GPS time is not available, the time is set from the Hello response on a successful connection to the server. 

If there’s no GPS time and no successful server connections, the RTC clock will appear to be 2013-01-01 00:00:00 (DME Epoch) and records may be logged with this time. 

The RTC time will usually be lost after a full power reset. If the processor simply restarts and power is maintained, the RTC clock will be retained.