The official change to standard time occured at 2 a.m. Sunday, though most folks changed their clocks Saturday night and enjoyed an extra hour of sleep.

Some states and territories don't observe daylight-saving time and thus did not have to worry about changing their clocks back. Those are Arizona, Hawaii, Puerto Rico, the Virgin Islands, American Samoa, Guam and the Northern Marianas.

Daylight saving time returns next March 13.