Most of the United States begins Daylight Saving Time at 2:00 a.m. on the second Sunday in March and reverts to standard time on the first Sunday in November.
In the U.S., each time zone switches at a different time.
Adding to the confusion is the fact that the term Daylight Saving Time is inaccurate, since no daylight is in fact saved
. Daylight Shifting Time will be better, and Daylight Time Shifting more accurate, but is politically desirable.
Saving is used here as a verbal adjective . It modifies time and tells us more about its nature; namely, that it's characterized by the action of saving daylight
. It's a daylight kind of time. As a result of this, it would be more accurate to refer to DST as daylight-saving time. Similar examples would be a mind-expanding book or a man-eating tiger. Saving is used in the exact same manner as saving a ball game, as opposed to as a savings account
In the European Union, Summer Time begins and ends at 1:00 a.m. Universal Time
. It begins the last Sunday in March and ends the last Sunday in October. In the EU, all time zones change at the moment.
In the U
nited States, Daylight Saving Time commences at 2:00 a.m. to minimize disturbance. But many states restrict bars from serving alcohol between 2:00 a.m. and 6:00 a.m.. At 2:00 a.m. in the fall, however, the time switches back one hour. So, can bars serve alcohol for this extra hour? Some states claim that pubs actually stop serving liquor at 1:59 a.m., so they have already stopped serving when the time reverts to Standard Time. Other states solve the problem by stating that liquor can be served until 'two hours after midnight
.' In practice, however, several establishments stay open an hour in the fall.
Many fire departments encourage people to change the batteries in their smoke detectors when they change their clocks because Daylight Saving Time provides a convenient reminder ' A working smoke detector more than doubles a person's chances of surviving a home fire,' says William McNabb of the Troy Fire Department in Michigan. More than 90 percent of homes in the United States have smoke detectors, but one-third are estimated to have dead or missing batteries.
In the U
.S., clocks change at 2:00 a.m. local time. In spring, clocks spring forward from 1:59 a.m. to 3:00 a.m.; in autumn, clocks fall back from 1:59 a.m. to 1:00 a.m.. In the EU, clocks change at 1:00 a.m. Universal Time. In spring, clocks spring forward from 12:59 a.m. to 2:00 a.m.; in autumn, clocks fall back from 1:59 a.m. to 1:00 a.m.
In the U.S., 2:00 a.m. was originally selected as the changeover time as it was practical and reduced disruption. Most people were at home and this was the time when the fewest trains were running. It is late enough to minimally affect restaurants and bars, and it prevents the day from switching to yesterday, which would be confusing. It's early enough that the whole continental U.S. switches by daybreak, and the changeover occurs before most early shift workers and early churchgoers are affected.