Did you know that Daylight Saving Time was originally introduced as a wartime measure to conserve energy and fuel during World War I? On March 19, 1918, President Woodrow Wilson signed the Standard Time Act into law, establishing standard time zones and implementing Daylight Saving Time to extend daylight hours and reduce the need for artificial lighting. During World War II, the U.S. reintroduced nationwide Daylight Saving Time, known as "War Time," from 1942 to 1945. However, after the war, there was no uniform policy, leading to confusion as states and localities set their own schedules.