Hawaii, American Samoa, Guam, Puerto Rico, the U.S. Virgin Islands and most of Arizona don't observe daylight saving time, so no need to change the clocks in those places.
By Associated Press
Most Americans will set their clocks 60 minutes forward before heading to bed Saturday night, and most smart phones should update automatically. Daylight saving time officially starts Sunday at 2 a.m. local time.
By News Desk
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