When Do We Change the Clocks Back 2017

When Does DST Start and End in the US?

Daylight Saving Time (DST) in most of the United States starts on the 2nd Sunday in March and ends on the 1st Sunday in November.

Which States and Federal Districts use Daylight Saving Time in 2021

Areas in United States using DST in 2021
Areas in United States on standard time all of 2021

DST in States and Federal Districts in USA (51 in total, 49 where all observe DST, 1 which doesn't observe DST, 1 with parts on DST)
Alabama	14 Mar - 7 Nov	Kentucky	14 Mar - 7 Nov	Ohio	14 Mar - 7 Nov
Alaska	14 Mar - 7 Nov	Louisiana	14 Mar - 7 Nov	Oklahoma	14 Mar - 7 Nov
Arizona (northeast)	14 Mar - 7 Nov	Maine	14 Mar - 7 Nov	Oregon	14 Mar - 7 Nov
Arizona	No DST	Maryland	14 Mar - 7 Nov	Pennsylvania	14 Mar - 7 Nov
Arkansas	14 Mar - 7 Nov	Massachusetts	14 Mar - 7 Nov	Rhode Island	14 Mar - 7 Nov
California	14 Mar - 7 Nov	Michigan	14 Mar - 7 Nov	South Carolina	14 Mar - 7 Nov
Colorado	14 Mar - 7 Nov	Minnesota	14 Mar - 7 Nov	South Dakota	14 Mar - 7 Nov
Connecticut	14 Mar - 7 Nov	Mississippi	14 Mar - 7 Nov	Tennessee	14 Mar - 7 Nov
Delaware	14 Mar - 7 Nov	Missouri	14 Mar - 7 Nov	Texas	14 Mar - 7 Nov
District of Columbia	14 Mar - 7 Nov	Montana	14 Mar - 7 Nov	Utah	14 Mar - 7 Nov
Florida	14 Mar - 7 Nov	Nebraska	14 Mar - 7 Nov	Vermont	14 Mar - 7 Nov
Georgia	14 Mar - 7 Nov	Nevada	14 Mar - 7 Nov	Virginia	14 Mar - 7 Nov
Hawaii	No DST	New Hampshire	14 Mar - 7 Nov	Washington	14 Mar - 7 Nov
Idaho	14 Mar - 7 Nov	New Jersey	14 Mar - 7 Nov	West Virginia	14 Mar - 7 Nov
Illinois	14 Mar - 7 Nov	New Mexico	14 Mar - 7 Nov	Wisconsin	14 Mar - 7 Nov
Indiana	14 Mar - 7 Nov	New York	14 Mar - 7 Nov	Wyoming	14 Mar - 7 Nov
Iowa	14 Mar - 7 Nov	North Carolina	14 Mar - 7 Nov
Kansas	14 Mar - 7 Nov	North Dakota	14 Mar - 7 Nov

DST in Other Locations in USA (1 Location)
Palmyra Atoll	No DST

Which States Don't Use DST?

Most of Arizona and Hawaii don't use DST. Indiana introduced DST in 2006.

Daylight Saving Time in Dependencies of USA

Dependency	Type	Daylight Saving Time Period
American Samoa	Unincorp. unorg. territory	No Daylight Saving Time
Guam	Unincorp. org. territory	No Daylight Saving Time
Northern Mariana Islands	Unincorp. org. territory	No Daylight Saving Time
Puerto Rico	Unincorp. org. territory	No Daylight Saving Time
US Minor Outlying Islands	Territory	No Daylight Saving Time
US Virgin Islands	Unincorp. org. territory	No Daylight Saving Time

US dependencies do not use Daylight Saving Time (DST).

Daylight Saving Time History in United States

• United States first observed Daylight Saving Time in 1918.
• United States has observed DST for 104 years between 1918 and 2021 (DST in at least one location).
• See Worldwide DST Statistics

DST in the USA Today

Daylight Saving Time (DST) in the USA starts on the 2nd Sunday in March and ends on the 1st Sunday in November. The current schedule was introduced in 2007 and follows the Energy Policy Act of 2005.

According to section 110 of the act, the US Department of Transportation (DOT) governs the use of DST. The law does not affect the rights of the states and territories that choose not to observe DST.

Confusing DST Rules

Historically, there were no uniform rules for DST from 1945 to 1966. This caused widespread confusion, especially in transport and broadcasting. The Uniform Time Act of 1966 aligned the switch dates across the USA for the first time.

Following the 1973 oil embargo, the US Congress extended the DST period to 10 months in 1974 and 8 months in 1975, in an effort to save energy.

After the energy crisis was over in 1976, the DST schedule in the US was revised several times. From 1987 to 2006, the country observed DST for about 7 months each year.

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When Do We Change the Clocks Back 2017

Source: https://www.timeanddate.com/time/change/usa

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