( This Is for March 3,2025 through march 7,2025) In February 1942, Congress implemented a law instating a national daylight saving time to help conserve fuel and "promote national security and defense,President Woodrow Wilson signed the Standard Time Act into law in 1918, which established daylight saving time in the United States for the first time. However, Congress repealed the act seven months later, and states were allowed to choose whether to continue observing daylight saving time. ExplanationDaylight saving time was first used in Germany during World War I to help conserve fuel and electricity. President Franklin D. Roosevelt re-established daylight saving time nationwide in 1942 during World War II. It was called "War Time" and lasted until September 30, 1945. In 1966, President Lyndon Johnson signed the Uniform Time Act into law, which made the start and end dates of daylight saving time uniform across the country. In 1974, President Richard Nixon signed the Emergency Daylight Saving Time Energy Conservation Act of 1973, which established year-round daylight saving time. However, in October 1974, President Gerald Ford signed legislation reversing permanent daylight saving time. The Uniform Time Act of 1966 (15 U.S. Code Section 260a) [see law], signed into Public Law 89-387 on April 12, 1966, by President Lyndon Johnson, created Daylight Saving Time to begin on the last Sunday of April and to end on the last Sunday of October.Permanent DST in the US was briefly enacted by president Richard Nixon in January 1974, in response to the 1973 oil crisis. The new permanent DST law was retracted within the year. Year-round daylight saving time was initially supported by 79% of the public, but that support had dropped to 42% after its first winter.Energy Policy Act of 2005 The Energy Policy Act extended DST a few weeks, beginning the second Sunday of March, and ending on the first Sunday in November.When does daylight saving time start in 2025? Daylight saving time begins at 2 a.m. on Sunday, March 9, at which time clocks 'spring forward' and reset to 3 a.m.