Daylight Saving Time to End Sunday, Nov. 4, for Most Americans. Most of the nation will return to standard time at 2 a.m. on Sunday, Nov. 4, when clocks will be turned back one hour, providing an additional hour of daylight in the morning. Under law, daylight saving time is observed from the second Sunday in March to the first Sunday in November, with the nation returning to daylight saving time starting Sunday, March 10, 2013. Federal law does not require any area to observe daylight time, but those that do must follow the starting and ending dates set by the law. No resetting of clocks is required for those parts of the country not observing daylight time: Arizona, Hawaii, Puerto Rico, the Virgin Islands, American Samoa, Guam and the Northern Marianas. The U.S. Department of Transportation has overseen the time laws since 1966, when Congress transferred this responsibility from the Interstate Commerce Commission. Contact: Bill Mosley (202-366-4570).