British Daylight Saving Time 1914; Wikimedia Commons

British Daylight Saving Time 1914; Wikimedia Commons

 

Daylight Saving Time (advancing the clock one hour in springtime) was instituted in the U.S. and in many European countries during WWI, but was unpopular in the USA and repealed in 1918. In February 1942, in an effort to better utilize daylight hours and conserve energy, the law was re-instituted in the USA.