įrom 1945 to 1966 there was no federal law on daylight saving time, so localities could choose when it began and ended or drop it entirely. After 1945 many states and cities east of the Mississippi River (and mostly north of the Ohio and Potomac rivers) adopted summer DST. It lasted until the last Sunday (the 30th) in September 1945. On February 9, 1942, President Franklin Roosevelt instituted year-round DST, called "War Time". A nationwide DST would not be established again until World War II. Because of NYC's position as a financial capital, other places followed. New York City continued to observe a metropolitan DST, while rural areas outside the city did not. Congress abolished DST after the war, overriding President Woodrow Wilson's veto. The idea was unpopular, especially with farmers because DST meant they had less time in the morning to get their milk and harvested crops to market. The plan was not adopted in the United States until the Standard Time Act of March 19, 1918, which confirmed the existing standard time zone system and set summer DST to begin on Ma(reverting October 27). The following table lists recent past and near future starting and ending dates of daylight saving time in the United States of America:ĭuring World War I, in an effort to conserve fuel, Germany began observing DST on May 1, 1916. Daylight saving time lasts for a total of 34 weeks (238 days) every year, about 65% of the entire year. and in fall they are moved back from 2:00 a.m. With a mnemonic word play referring to seasons, clocks "spring forward, fall back"-that is, in springtime the clocks are moved forward from 2:00 a.m.
In the U.S., daylight saving time starts on the second Sunday in March and ends on the first Sunday in November, with the time changes taking place at 2:00 a.m. The Uniform Time Act of 1966 established the system of uniform daylight saving time throughout the US.
Most areas of the United States observe daylight saving time (DST), the exceptions being Arizona (except for the Navajo, who do observe daylight saving time on tribal lands), Hawaii, and the overseas territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the United States Virgin Islands. Daylight saving time in the United States is 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.
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