As if the weekend weren’t short enough, there will be one less hour of sleep Sunday morning when Daylight Savings Time begins. All your clocks, computers, VCRs and answering machines will need to be reset one hour ahead.

Daylight Savings Time was first used in the United States during World War I and World War II to conserve energy and reduce the need for artificial lighting with longer daylight hours. In 1966 Congress created standards for the practice by designating the first Sunday in April at 2 a.m. as the start of daylight savings and the last Sunday in October at 2 a.m. as the end.

Arizona and parts of Indiana are the only places in the continental United States that do not observe daylight savings. After the wars, each state was allowed to choose whether it would participate in the annual time change.

Other parts of the world also observe daylight savings. Europe calls it a "summertime period," and in the Southern Hemisphere, Daylight Savings Time is observed in the summer – from October to March.

This year, Daylight Savings Time will end Oct. 25 at 2 a.m.

– Abby Brach