Daylight Saving Time Starts Sunday, March 14 Daylight Saving Time (DST) starts on the second Sunday of March for the United States when clocks are turned forward one hour from 2 a.m. to 3 a.m., from local standard time to local daylight time. As a result, there is one 23-hour day in late winter or early spring and one 25-hour day in the autumn. DST, implemented to save energy and make better use of daylight, was first used in 1908 in Thunder Bay, Canada. The Uniform Time Act of 1966 established the system of uniform daylight saving time throughout the U.S. Even though Californians did vote to end the time change when they passed Proposition 7 in 2018 by 62%, the California State Senate needs to pass it by a two-thirds vote. Even if they pass in California, the federal government then needs to approve it.