Nov 2, 2025, 2:00 am
| Country: | United States |
|---|---|
| Long Name: | United States of America |
| Abbreviations: | US, USA |
| Capital: | Washington DC |
| Time Zones: | 7 (Main Country) |
| Total Time Zones: | 13 (with dependencies) |
| Dial Code: | +1 |
Mar 31
Forward 1 hour
Mar 31, 1918 - Daylight Saving Time Started
When local standard time was about to reach
Sunday, March 31, 1918, 2:00:00 am clocks were turned forward 1 hour to
Sunday, March 31, 1918, 3:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Mar 31, 1918 than the day before. There was more light in the evening and less light in the morning.
Also called Spring Forward, Summer Time, and Daylight Savings Time.
Oct 27
Back 1 hour
Oct 27, 1918 - Daylight Saving Time Ended
When local daylight time was about to reach
Sunday, October 27, 1918, 2:00:00 am clocks were turned backward 1 hour to
Sunday, October 27, 1918, 1:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Oct 27, 1918 than the day before. There was more light in the morning and less light in the evening.
Also called Fall Back and Winter Time.
Other years: 2025
When Does DST Start and End in the US?
Daylight Saving Time (DST) in most of the United States starts on the second Sunday in March and ends on the first Sunday in November.
Which States and Federal Districts use Daylight Saving Time in 1918
Areas in United States on standard time all of 1918
DST in States and Federal Districts in USA in 1918
|
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|---|---|---|---|---|---|
| Alabama | Mar 31 – Oct 27 | Louisiana | Mar 31 – Oct 27 | Ohio | Mar 31 – Oct 27 |
| Alaska | No DST | Maine | Mar 31 – Oct 27 | Oklahoma | Mar 31 – Oct 27 |
| Arizona | Mar 31 – Oct 27 | Maryland | Mar 31 – Oct 27 | Oregon | Mar 31 – Oct 27 |
| Arkansas | Mar 31 – Oct 27 | Massachusetts | Mar 31 – Oct 27 | Pennsylvania | Mar 31 – Oct 27 |
| California | Mar 31 – Oct 27 | Michigan (northwest) | Mar 31 – Oct 27 | Rhode Island | Mar 31 – Oct 27 |
| Colorado | Mar 31 – Oct 27 | Michigan | No DST | South Carolina | Mar 31 – Oct 27 |
| Connecticut | Mar 31 – Oct 27 | Minnesota | Mar 31 – Oct 27 | South Dakota | Mar 31 – Oct 27 |
| Delaware | Mar 31 – Oct 27 | Mississippi | Mar 31 – Oct 27 | Tennessee | Mar 31 – Oct 27 |
| District of Columbia | Mar 31 – Oct 27 | Missouri | Mar 31 – Oct 27 | Texas | Mar 31 – Oct 27 |
| Florida | Mar 31 – Oct 27 | Montana | Mar 31 – Oct 27 | Utah | Mar 31 – Oct 27 |
| Georgia | Mar 31 – Oct 27 | Nebraska | Mar 31 – Oct 27 | Vermont | Mar 31 – Oct 27 |
| Hawaii | No DST | Nevada | Mar 31 – Oct 27 | Virginia | Mar 31 – Oct 27 |
| Idaho | Mar 31 – Oct 27 | New Hampshire | Mar 31 – Oct 27 | Washington | Mar 31 – Oct 27 |
| Illinois | Mar 31 – Oct 27 | New Jersey | Mar 31 – Oct 27 | West Virginia | Mar 31 – Oct 27 |
| Indiana | Mar 31 – Oct 27 | New Mexico | Mar 31 – Oct 27 | Wisconsin | Mar 31 – Oct 27 |
| Iowa | Mar 31 – Oct 27 | New York | Mar 31 – Oct 27 | Wyoming | Mar 31 – Oct 27 |
| Kansas | Mar 31 – Oct 27 | North Carolina | Mar 31 – Oct 27 | ||
| Kentucky | Mar 31 – Oct 27 | North Dakota | Mar 31 – Oct 27 | ||
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 108 years between 1918 and 2025 (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 second Sunday in March and ends on the first 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.