NBC News….
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.
When does daylight saving time end?
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.
The sun will also start setting earlier across the United States as we head into the late fall and winter.
How long does 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.
That means daylight saving time will begin again next year March 8 and end Nov. 1.
Why do we observe daylight saving time?
The practice, established by the Standard Time Act in 1918, according to the Astronomical Applications Department of the U.S. Naval Observatory, is an effort to extend the daylight hours we have in the summertime by pushing off sunset an extra hour.
Daylight saving time, a contested idea after it was passed, was quickly repealed in 1919, becoming a local matter. It was re-enacted during the early days of World War II and observed from 1942 to 1945, according to the department.
After the war, the implementation of daylight saving time varied from state to state until the Uniform Time Act was passed in 1966, standardizing the dates of daylight saving time but allowing local exemptions if states or localities didn’t want to participate.
According to the Astronomical Applications Department, 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….
Note….
Smart Phones and Computers will automatically switch if you are in the right time zone….