Daylight Saving Time 2010: Why and When It Ends

Why fall back? Should daylight savings be stopped? Get the facts—and a bit more.

For most Americans, daylight saving time ends in 2010 at 2 a.m. on Sunday, November 7, when most states fall back to standard time. Time will spring forward again on March 13, 2011, when daylight saving time resumes.

The federal government doesn't require U.S. states or territories to observe daylight saving time, which is why residents of Arizona, Hawaii, Puerto Rico, the Virgin Islands, American Samoa, Guam, and the Northern Marianas Islands won't need to turn back their clocks this weekend.

Where it is observed, daylight savings has been known to cause some problems.

National surveys by Rasmussen Reports, for example, show that 83 percent of respondents knew when to move their clocks ahead in spring 2010. Twenty-seven percent, though,

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