Modifying System Time
Sometimes you need to modify the system time. You can update time to match the international time standard, Coordinated Universal Time (UTC), from a source such as telephone, radio, satellite, or another external referencer, if your network does not use time providers and the network systems have been running for some time. The clock set command accomplishes this task by gradually modifying the time.
The clock set command used with the -abruptly option and the dts synchronize command provide additional methods for adjusting the system clock and synchronizing systems.