The idea and practice of changing our clocks and observing Daylight Savings Time has had a rocky past. Back in 1918 the Standard Time Act was passed into law in the Unites States (not all countries change their clocks), but was repealed in 1919. It was re-established again at the beginning of World War II and was in effect from February 9, 1942 to September 30, 1945. After the war though the use of Daylight Savings Time was not consistent across the country. Standardization of the beginning and ending dates of Daylight Savings Time was set by the Uniform Time Act of 1966, but allowed for local exemptions from its observance. At that time, the act provided that daylight time begin on the last Sunday in April and end on the last Sunday in October, with the changeover to occur at 2 a.m. local time.
Since 1974 with the "energy crisis" though, Congress enacted earlier starting dates for daylight time. Most recently in 2007, daylight time starts on the second Sunday in March and ends on the first Sunday in November.
This year we change our clocks at 2:00am local time on Sunday, March 14 and switch them back on Sunday, November 7. For future years Daylight Saving Time dates, click here.
Also note, Hawaii and most places in Arizona do not observe Daylight Savings Time.
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