It's time to change your clock
Beginning this year, daylight saving time ends the first Sunday of November -- one week later than usual. That means clocks need to be set back an hour on Sunday at 2 a.m. Daylight saving time also started earlier this year; we changed the clocks the second Sunday in March.
The new rules were enacted by Congress in 2005, but weren't put into effect immediately so potential software problems could be worked out, said David Prerau, author of "Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time." Prerau also was a consultant to Congress on the law extending daylight saving time.