It's time to fall back.

Standard time returns this weekend at 2 a.m. Sunday, so set your clocks back an hour before going to sleep Saturday night.

The change means most Americans will get an extra hour of rest, but those working overnight shifts might toil an hour longer. It also means some will forget to change their clocks, and show up early for church or other events on Sunday.

Daylight time returns in March.

The time change doesn't apply in Arizona, Hawaii, Puerto Rico, the Virgin Islands, American Samoa, Guam and the Northern Mariana Islands.

State fire marshals are using the event to remind homeowners daylight savings time is a good time to replace the batteries in their fire alarms.

He reports that about 90 percent of American homes have smoke alarms, but about one-third of them don't work due to age or dead or missing batteries.

Last year in Minnesota, for example, about a quarter of fire deaths took place in homes without working smoke alarms — and half of the deaths happened between November and February.