Daylight saving time will end a week later than people are accustomed to this year.
Clocks will need to be set back an hour next Sunday, Nov. 4. Until this year, timekeeping fell back to normal on the last Sunday in October.
Congress and President George W. Bush extended daylight saving time with the Energy Conservation Act of 2005 in order to save energy, by decreasing the amount of artificial light used in the evenings.
Daylight saving time began three weeks earlier this year, on the second Sunday of March, instead of the first Sunday in April.
The federal government first legislated daylight saving times into existence during World War I, again during World War II and it has been in effect ever since.