Daylight saving time is ending Sunday. Here's what to know as clocks 'fall back.'

It’s time to fall back again

It’s time to fall back again.

The clock will strike 1 a.m. twice Sunday as daylight saving time once again comes to an end.

Here’s what you need to know about daylight saving time and why the United States changes clocks twice a year.

Daylight saving time started March 9 and ends 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.