Historically, daylight saving time has begun in the summer months and ended for winter, though the dates have changed over time as the U.S. government has passed new statutes, according to the U.S. Naval Observatory (USNO). Starting in 2007, DST begins in the United States on the second Sunday in March, when people move their clocks forward an hour at 2 a.m. local standard time (so at 2 a.m. on that day, the clocks will then read 3 a.m. local daylight time).
Daylight saving time ends on the first Sunday in November, when clocks are moved back an hour at 2 a.m. local daylight time (so they will then read 1 a.m. local standard time). Last year, DST began on March 13 and ended on Nov. 6. And this year, DST began on March 12 and ends on Nov. 5, 2017. You will then move your clock forward an hour on March 11, 2018, and the cycle will begin again.
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