Daylight Saving Time begins on Sunday, March 14, 2021 at 2:00 A.M. On Saturday night, clocks are set forward one hour (i.e., losing one hour) to “spring forward.” Daylight Saving Time ends on Sunday, November 7, 2021, at 2:00 A.M. On Saturday night, clocks are set back one hour (i.e., gaining one hour) to “fall back.”

Why the time is changed?

The main purpose of Daylight Saving Time (called "Summer Time" in many places in the world) is to make better use of daylight. We change our clocks during the summer months to move an hour of daylight from the morning to the evening. ... If you live near the equator, day and night are nearly the same length (12 hours).

Why did the time change start?

Clocks in the German Empire, and its ally Austria, were turned ahead by one hour on April 30, 1916—two years into World War I. The rationale was to minimize the use of artificial lighting to save fuel for the war effort. Within a few weeks, the United Kingdom, France, and many other countries followed the idea.