.02 Daylight Saving Time (DST) Definition

FAA6.Q Glossary Terms and Acronyms : 01 Glossary Terms - Overview : D Glossary Terms Beginning with D - Overview : .02 Daylight Saving Time (DST) Definition

Daylight Saving Time (DST) begins, for most of the United States, on the second Sunday of March, and ends on the first Sunday of November.

In March, clocks are moved forward from 2:00 a.m. to 3:00 a.m.

In November, time reverts to Standard Time, from 2:00 a.m. to 1:00 a.m.

DST is not observed in the U.S. and its territories in the following regions:

●American Samoa

●Arizona, except for the following FAA offices on the Navajo Nation:

NOTE The Navajo Nation in Arizona participates in DST due to its large size and location in three states. Arizona, except the Navajo Nation, is always on Mountain Standard Time.

●Guam

●Hawaii

●Puerto Rico

●Virgin Islands

DST begin and end dates are as follows:

Year	Begin Date	End Date
2021	March 14	November 7
2022	March 13	November 6
2023	March 12	November 5
2024	March 10	November 3