Daylight saving time ends Sunday. Here’s 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.

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…

Original source: https://www.nbcnews.com/business