Daylight Saving Time will end at 2 a.m. on Sunday, Nov. 5. Eastern Time, when much of the United States sets their clocks back one hour.
With the exception of Hawaii, parts of Arizona, American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the Virgin Islands, nearly every region in the United States experiences this annual shifts.
The majority of Canada, Europe, sections of Australia, and Chile and Paraguay in South America will also observe Daylight Saving Time and alter their clocks.
Most countries in the Northern Hemisphere change their clocks on the last Sunday of October or the first Sunday of November.
In the contiguous U.S., five time zones and the observance of DST were first adopted to make the scheduling of railroad traffic easier.
Adherence to DST was made a legal requirement in 1966, and the then-newly-created Department of Transportation took over management and oversight of U.S. time zones.
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