Forward 1 hour
When local standard time was about to reach
Sunday, March 11, 2012, 2:00:00 am clocks were turned forward 1 hour to
Sunday, March 11, 2012, 3:00:00 am local daylight time instead.
Sunrise and sunset were about 1 hour later on Mar 11, 2012 than the day before. There was more light in the evening.
Back 1 hour
When local daylight time was about to reach
Sunday, November 4, 2012, 2:00:00 am clocks were turned backward 1 hour to
Sunday, November 4, 2012, 1:00:00 am local standard time instead.
Sunrise and sunset were about 1 hour earlier on Nov 4, 2012 than the day before. There was more light in the morning.
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.
DST in States and Federal Districts in USA in 2012
|Alabama||Mar 11 - Nov 4||Kentucky||Mar 11 - Nov 4||Ohio||Mar 11 - Nov 4|
|Alaska||Mar 11 - Nov 4||Louisiana||Mar 11 - Nov 4||Oklahoma||Mar 11 - Nov 4|
|Arizona (northeast)||Mar 11 - Nov 4||Maine||Mar 11 - Nov 4||Oregon||Mar 11 - Nov 4|
|Arizona||No DST||Maryland||Mar 11 - Nov 4||Pennsylvania||Mar 11 - Nov 4|
|Arkansas||Mar 11 - Nov 4||Massachusetts||Mar 11 - Nov 4||Rhode Island||Mar 11 - Nov 4|
|California||Mar 11 - Nov 4||Michigan||Mar 11 - Nov 4||South Carolina||Mar 11 - Nov 4|
|Colorado||Mar 11 - Nov 4||Minnesota||Mar 11 - Nov 4||South Dakota||Mar 11 - Nov 4|
|Connecticut||Mar 11 - Nov 4||Mississippi||Mar 11 - Nov 4||Tennessee||Mar 11 - Nov 4|
|Delaware||Mar 11 - Nov 4||Missouri||Mar 11 - Nov 4||Texas||Mar 11 - Nov 4|
|District of Columbia||Mar 11 - Nov 4||Montana||Mar 11 - Nov 4||Utah||Mar 11 - Nov 4|
|Florida||Mar 11 - Nov 4||Nebraska||Mar 11 - Nov 4||Vermont||Mar 11 - Nov 4|
|Georgia||Mar 11 - Nov 4||Nevada||Mar 11 - Nov 4||Virginia||Mar 11 - Nov 4|
|Hawaii||No DST||New Hampshire||Mar 11 - Nov 4||Washington||Mar 11 - Nov 4|
|Idaho||Mar 11 - Nov 4||New Jersey||Mar 11 - Nov 4||West Virginia||Mar 11 - Nov 4|
|Illinois||Mar 11 - Nov 4||New Mexico||Mar 11 - Nov 4||Wisconsin||Mar 11 - Nov 4|
|Indiana||Mar 11 - Nov 4||New York||Mar 11 - Nov 4||Wyoming||Mar 11 - Nov 4|
|Iowa||Mar 11 - Nov 4||North Carolina||Mar 11 - Nov 4|
|Kansas||Mar 11 - Nov 4||North Dakota||Mar 11 - Nov 4|
DST in Other Locations in USA in 2012 (1 Location)
|Palmyra Atoll||No DST|
|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).
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.
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.
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.