February 9, 1942 - Congress Reinstates Daylight Saving Time
For the second time in history, Congress instates Daylight Saving Time (DST) for the United States. DST is enacted in response to the Second World War, as a way to help conserve energy. Under the provision, time in the U.S. is advanced by one hour year-round. The federal law will remain in effect until September 1945. In 1966, the Uniform Time Act will establish a nationwide time pattern from which states can exempt themselves.