In 2019, daylight saving time in the United States began on March 10 at 2 a.m. local time, and it will end on Nov. 3 at 2 a.m. local time. In the spring, clocks are set forward by one hour, and in the fall, they are set back to their original time.
Daylight saving time (often referred to as "daylight savings time") starts and ends on different dates every year, as they always fall on Sundays. These dates also vary by country and region.
The practice of turning clocks forward an hour throughout the summer months was established in the early 20th century as a means of reducing the amount of fuel required for electric power. Today, there is much debate over the efficacy of daylight saving time, with multiple studies in disagreement over its reduction of energy usage, economic benefits, and health concerns. In one survey, two-thirds of respondents didn’t see the point of it. Still, over 70 countries observe the clock-changing ritual.