The rules increased the duration of DST by about one month. The new changes were enacted by the Energy Policy Act of 2005, which extended the length of DST in the interest of reducing energy consumption. The rules for DST changed in 2007 for the first time in more than 20 years. What are the current rules for daylight saving time? Mosley said research has shown that more available daylight increases energy savings while decreasing the number of traffic accidents, traffic fatalities, and incidences of crime.Ĭongress noted other advantages while updating legislation in 1986, including "more daylight outdoor playtime for the children and youth of our Nation, greater utilization of parks and recreation areas, expanded economic opportunity through extension of daylight hours to peak shopping hours and through extension of domestic office hours to periods of greater overlap with the European Economic Community.During 2023, daylight saving time is in effect from March 12 at 2 a.m. Farmers and others who rise before dawn may have to operate in the dark a while longer before daybreak.ĭaylight saving time, however, can bring many benefits. Not everyone benefits from the change, Mosley conceded. Evening DaylightĪccording to Mosley, the drive behind the switch is "to adjust daylight hours to when most people are awake and about."ĭaylight saving time decreases the amount of daylight in the morning hours so that more daylight is available during the evening. That section of the act was repealed the following year, and DST thereafter became a matter left up to local jurisdictions.ĭaylight saving time was observed nationally again during World War II, but was not uniformly practiced after the war's end.įinally, in 1966, Congress passed the Uniform Time Act, which standardized the start and end dates for daylight saving time but allowed individual states to remain on standard time if their legislatures allowed it.Ī 1972 amendment extended the option not to observe DST to areas lying in separate time zones but contained within the same state.īefore the move by Congress last year to extend DST, the most recent modification occurred in 1986, when the start date was moved from the last Sunday in April to the first Sunday in April. Part of the Act of 1918 also legislated for the observance of daylight saving time nationwide. The only federal regulatory agency in existence at that time happened to be the Interstate Commerce Commission, so Congress granted the agency authority over time zones and any future modifications that might be necessary. Congress eventually came on board, signing the railroad time zone system into law in 1918. railroad industry established official time zones with a set standard time within each zone. When the railroads came in, that necessitated more standardization of time so that railroad schedules could be published." "It was kind of a crazy quilt of time, time zones, and time usage. "In the early 19th century … localities set their own time," Mosley said. Department of Transportation, explains that it all dates back to the heyday of railroads. So why is a transportation authority in charge of time laws? Bill Mosley, a public affairs officer at the U.S. Congress ordered the agency to "foster and promote widespread and uniform adoption and observance of the same standard of time within and throughout each such standard time zone." Congress transferred that responsibility to the newly created Department of Transportation. Oversight of DST first resided with the Interstate Commerce Commission. Naval Observatory in Washington, D.C., sets what is known as standard time in the country through its maintenance of atomic clocks, the observatory has nothing to do with daylight saving time. Next year, daylight saving time will begin three weeks earlier, on March 11, and end a week later, on November 4.
Congress passed a law extending DST by one month as of 2007.
This is the last year, however, in which daylight saving time will fall within those days. Likewise, the rule requires that regions that observe daylight saving time, or DST, begin the period at the same time on the first Sunday in April. Those locales never deviated from standard time within their particular time zones.Ĭontrary to popular belief, no federal rule mandates that states or territories observe daylight saving time.įederal law simply stipulates that areas that do switch back to standard time at 2 a.m. territories of Puerto Rico and the Virgin Islands, among others-will do nothing. However, residents of Arizona and Hawaii-along with the U.S. residents set their clocks one hour forward in spring and one hour back in fall.
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