When Do We Change Our Clocks?
Daylight Saving Time begins for most of the United States at 2 a.m. on the first Sunday of April.
Time reverts to standard time at 2 a.m. on the last Sunday of October.
In the U.S., each time zone switches at a different time.
Spring forward, Fall back
During DST, clocks are turned forward an hour, effectively moving an hour of daylight from the morning to the evening.
By the Energy Policy Act of 2005, daylight saving time (DST) was extended in the United States in 2007. DST starts on the second Sunday of March and it ends on the first Sunday of November. These changes result in a DST period that is four weeks (five in years when March has five Sundays) longer than in previous years. In 2008 daylight saving time ended at 2:00 AM (0200) on Sunday, November 2, and in 2009 it began at 2:00 AM (0200) on Sunday, March 8. Wyoming Senator Michael Enzi and Michigan Representative Fred Upton advocated the extension from October into November especially to allow children to go trick-or-treating in more daylight.
The following table list the dates of DST under the current law through 2025, barring any further adjustments to the law:
| Date DST Begins | Date DST Ends | Years |
|---|---|---|
| March 8 | November 1 | 2015, 2020 |
| March 9 | November 2 | 2014, 2025 |
| March 10 | November 3 | 2013, 2019, 2024 |
| March 11 | November 4 | 2018 |
| March 12 | November 5 | 2017, 2023 |
| March 13 | November 6 | 2016, 2022 |
| March 14 | November 7 | 2021 |
Under Section 110 of the Act, the U.S. Department of Energy was required to study the impact of the 2007 DST extension no later than nine months after the change took effect; the report, released in October 2008, reported a nationwide electricity savings of 0.03% for the year of 2007.[6]
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UT date and time of equinoxes and solstices on Earth[1] |
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|---|---|---|---|---|---|---|---|---|
| event |
Northward equinox |
Northern solstice |
Southward equinox |
Southern solstice |
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| month | March | June | September | December | ||||
| year | ||||||||
| day | time | day | time | day | time | day | time | |
| 2013 | 20 | 11:02 | 21 | 05:04 | 22 | 20:44 | 21 | 17:11 |
| 2014 | 20 | 16:57 | 21 | 10:51 | 23 | 02:29 | 21 | 23:03 |
| 2015 | 20 | 22:45 | 21 | 16:38 | 23 | 08:20 | 22 | 04:48 |
| 2016 | 20 | 04:30 | 20 | 22:34 | 22 | 14:21 | 21 | 10:44 |
| 2017 | 20 | 10:28 | 21 | 04:24 | 22 | 20:02 | 21 | 16:28 |
| 2018 | 20 | 16:15 | 21 | 10:07 | 23 | 01:54 | 21 | 22:23 |
| 2019 | 20 | 21:58 | 21 | 15:54 | 23 | 07:50 | 22 | 04:19 |
| 2020 | 20 | 03:50 | 20 | 21:44 | 22 | 13:31 | 21 | 10:02 |