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This caused widespread confusion, especially in transport and broadcasting. Historically, there were no uniform rules for DST from 1945 to 1966.

The law does not affect the rights of the states and territories that choose not to observe DST. The current schedule was introduced in 2007 and follows the Energy Policy Act of 2005.Īccording to section 110 of the act, the US Department of Transportation (DOT) governs the use of DST.

United States has observed DST for 104 years between 19 (DST in at least one location).ĭaylight Saving Time (DST) in the USA starts on the 2nd Sunday in March and ends on the 1st Sunday in November.

United States first observed Daylight Saving Time in 1918.

Daylight Saving Time History in United States

US dependencies do not use Daylight Saving Time (DST). Daylight Saving Time in Dependencies of USA Dependency Most of Arizona and Hawaii don't use DST. (51 in total, 49 where all observe DST, 1 which doesn't observe DST, 1 with parts on DST)ĭST in Other Locations in USA (1 Location)

Business Date to Date (exclude holidays)ĭST in States and Federal Districts in USA.