Research has also suggested that with more daylight in the evenings, there are fewer traffic accidents, as there are fewer cars on the road when it's dark outside. Regions farthest away from the equator and closer to the poles get the most benefit from the DST clock change, because there is a more dramatic change in sunlight throughout the seasons. Because it revolves around this axis at an angle, different parts of our planet experience the sun's direct rays at different times of the year, leading to the seasons. Īs Earth orbits the sun, it also spins around its own imaginary axis. Related: Read more about the science of summer. During the summer season in each hemisphere, Earth, which revolves around its axis at an angle, is tilted directly toward the sun. That's because the days start to get longer as Earth moves from the winter season to spring and summer, with the longest day of the year on the summer solstice. However, those who do observe DST take advantage of the natural daylight in the summer evenings. Why do we have daylight saving time?įewer than 40% of the world's countries observe daylight saving time, according to. ![]() Then, in 2007, the Energy Policy Act of 2005 went into effect, expanding the length of daylight saving time to the present timing. That federal law meant that any state observing DST - and they didn't have to jump on the DST bandwagon - had to follow a uniform protocol throughout the state in which daylight saving time would begin on the first Sunday of April and end on the last Sunday of October. And in 1966, to tame such "Wild West" mayhem, Congress enacted the Uniform Time Act. states and towns were given the choice of whether or not to observe DST led to chaos. 9, 1942, President Franklin Roosevelt re-established daylight saving time year-round, calling it "War Time."Īfter the war, a free-for-all system in which U.S. (It's a myth that DST was instituted to help farmers.) And so daylight saving time was abolished until the next war brought it back into vogue. Though President Woodrow Wilson wanted to keep daylight saving time after WWI ended, the country was mostly rural at the time and farmers objected, partly because it would mean they lost an hour of morning light. ![]() (Image credit: Topical Press Agency/Getty Images) time zones and daylight saving time, which would begin on March 31. President Woodrow Wilson, shown here, signed the Standard Time Act in 1918, establishing U.S.
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