WASHINGTON — Most people will trade an hour's sleep this weekend for more sunlight in the evenings.

Officially the change should be made at 2 a.m. Sunday, local time, though most folks will reset their clocks and watches before going to bed.

The shift to daylight saving time also serves as a reminder to install new batteries in warning devices like smoke detectors and hazard warning radios.

In areas that observe daylight time, standard time will return on Nov. 2.

Some parts of the country don't observe daylight time. Those include Arizona, Hawai'i, Puerto Rico, the Virgin Islands, American Samoa, Guam and the Northern Marianas.