The description of TimeWarp - Play With New Friends
The TimeWarp utility sets your computer's clock from a time server using the Simple Network Time Protocol (SNTP). Using your computer's internet connection, timing messages from an SNTP time server can be obtained automatically to set your computer clock. TimeWarp operates in unicast mode where it sends a message to a time server and waits for a reply. The computer clock is set to the correct universal time, which is the time at the Greenwich meridian. TimeWarp assumes that you have set your computer clock to the correct time zone. Using the round trip time from request to receipt, a simple calculation determines the propagation delay between the server and client so that your computer clock can be aligned to within a few tens of milliseconds of the correct time.
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