Have you ever looked at your watch, phone clock, and system clock, all sporting different times, with no way to know which one is accurate? Dimension 4 accesses public time servers on the Internet and sets your system clock, so that there's at least one clock that you can trust. You can choose to have it only check the clock when you start your system, or if you're really time-conscious, you can choose to have it check the time server every 5 minutes, or whatever time interval you choose.