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The Ohio Clock in the U.S. Capitol being turned forward for the country's first daylight saving time on March 31, 1918 by the Senate sergeant at arms Charles Higgins.. Most of the United States observes daylight saving time (DST), the practice of setting the clock forward by one hour when there is longer daylight during the day, so that evenings have more daylight and mornings have less.
Daylight saving time in the Americas is the arrangement in the Americas by which clocks are advanced by one hour in spring and moved back in autumn, to make the most of seasonal daylight. The practice is widespread in North America, with most of Canada and the United States participating, but much less so in Central and South America.
From year to year, the dates on which to change clock may also move for political or social reasons. The Uniform Time Act of 1966 formalized the United States' period of daylight saving time observation as lasting six months (it was previously declared locally); this period was extended to seven months in 1986, and then to eight months in 2005.
Daylight saving time is an annual period when the United States and other countries change the clocks to make daylight last longer. In March, the clocks "spring forward" an hour, and in November ...
But daylight saving time, the twice-annual time change that impacts millions of Americans. On Sunday at 2 a.m. local time, the clocks in most, but not all, states will "fall back" by an hour ...
In the United States, time is divided ... Previous DST change dates Year Start End 2006 Apr 2: Oct 29 2007 Mar 11: Nov 4 2008 Mar 9: Nov 2 2009 Mar 8: Nov 1 2010 Mar ...
Daylight saving time was used again during World War II as a way to save energy for war production and later became a national standard in the U.S. in 1966 when Congress passed the Uniform Time Act.
For example, in Canada and the United States, when DST starts, the local time changes from 02:00 to 03:00, and when DST ends, the local time changes from 02:00 to 01:00. As the time change depends on the time zone, it does not occur simultaneously in all parts of these countries.