Rose: On windows XP & Vista computers that have that have the newest updates, it should do it automaticly.

For older PC's like 98, 2000 - or XP computers without the newest updates, it will not change automatically.

Where I work, I will be busy Monday - out of the 90 computers, about 10-15 are older that I will need to update - along with a time clock, phone system, and voice mail system which are programmed with the old rules - so i'll have to manually fix those (and then fix again in a few weeks when the time was suppose to change.)