Daylight saving time ends Sunday. Heres what to know as clocks fall back

Clocks across much of the United States will fall back once again Sunday as daylight saving time comes to an end.Congress and some states have tried multiple times this decade to get rid of the twice-yearly exercise but to no avail.President Donald Trump has expressed support for ending the time changes, arguing that permanent daylight saving time would allow for more daylight to parallel daytime habits while shrinking after-hours activity, including crime.

But many health and sleep experts argue against it, citing risks to health and safety.Here is what to know as we prepare to spin our clocks back Sunday — or let our cellphones do it instantly.When does daylight saving time end?Daylight saving time started at 2 a.m.

March 8 and ends at 2 a.m.Sunday.Unlike in the spring, when we lose an hour and the clocks skip the 2 o’clock hour entirely, we will gain an extra hour Sunday, with clocks jumping from 1:59 a.m.

back to 1 a.m.The sun will also start setting earlier across the United States as we head into the late fall and winter.The extra hour doesn’t necessarily mean more revelry on Halloween night: While some jurisdictions allow bars to serve last call according to Sunday’s updated time, California rules say bars must stop serving alcohol two hours past midnight, regardless of 1 a.m.’s repeat.How long will standard time last?Standard time across the United States will remain, as will earlier sunsets and darker evenings, until spring rolls around and daylight saving time starts once again on March 14.Daylight saving time will end next year on Nov.7.The standardized start and end dates have been changed throughout the years, but since 2007, daylight saving time has started the second Sunday in March and ended the first Sunday in November, according to the Astronomical Applications Department of the U.S.

Naval Observatory.Why do we observe daylight saving time?The practice, established by the Standard Time Act in 1918, according to the Astronomical Appli...