Under the Uniform Time Act, as amended, states can exempt themselves from observing daylight saving time by state law, according to the U.S. Department of Transportation.
Starting on November 5, everyone's days will abruptly get darker an hour earlier when daylight saving time ends. There are a few facts of this time change that you may not know.
Deeper analysis of the society-wide economic benefits of abolishing time changes supports what our bodies tell us.
Dr. Zhee said that for people sensitive to the time change, small changes made as late as Friday night can help prepare for a better Monday morning.
When the United States was hit by an oil supply crisis in the early 1970s, the federal government made a decision to extend daylight time year-round for two years in a bid to save energy. These alarms have strobe lights and bed shakers.
Originally adopted in Europe and the U.S.to save energy during World War I, daylight saving time has always been controversial, The Washington Post noted growing research now shows switching the clocks twice a year saves little, if any, energy.
Depression rates declined after about 10 weeks; researchers said that's because sunlight impacts the brain, and those studied were exposed to more sunlight at that point.
Beginning in 2007, Daylight Saving Time starts in the United States on the second Sunday in March and ends on the first Sunday in November. Research I undertook with professors Mark Kamstra of York University and Maurice Levi of the University of British Columbia, published in the American Economic Review, shows that stock markets may fall back whenever people collectively reset the clocks to gain or lose an hour.