Daylight Savings Time. Daylight saving time ends Sunday. What to know about ‘falling back.’
Here’s what you need to know as daylight saving time ends at 2 a.m. Sunday.
Here’s what you need to know about daylight saving time and why the U.S. changes clocks twice a year.
When does daylight saving time end?
Daylight saving time began March 10 and ends Nov. 3.
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 U.S. as the temperatures continue to cool down and we head into the late fall and winter months.
Why is this happening?
The practice, established by the Standard Time Act in 1918, according to the U.S. Astronomical Applications Department, 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Daylight saving time, a contested idea after it was first passed, was quickly repealed in 1919, becoming a local matter. It was re-enacted during the early days of World War II and was observed from 1942-1945, according to the department.
After the war, the implementation of daylight saving time varied from state to state until the Uniform Time Act passed in 1966, which standardized the dates of daylight saving time but allowed for local exemptions if states or localities did not want to participate.
According to the department, the standardized start and end dates have been changed throughout the years, but since 2007, daylight saving time has started on the second Sunday in March and ended on the first Sunday in November.
When will daylight saving time return?
Already sick of the early darkness? The longest nights reach their peak on Dec. 21, the winter solstice. After that, it’ll start getting gradually lighter each afternoon until daylight saving time finally comes back to the US on March 9, 2025.
Daylight saving returns to the UK on March 30 and ends for those areas in Australia that observe it on April 6.
Why don’t Arizona and Hawaii change their clocks?
Only two states and some territories never have to set their clocks forward or backward.
Federal law prohibits states from enacting permanent daylight saving time, but Arizona (except for the Navajo Nation) and Hawaii have instead made standard time permanent, which is perfectly acceptable under federal law.
Changing the clocks may be bad for your health
Herzog said the time changes disrupt the body’s circadian rhythm, which is like our internal clock. Springing forward an hour in March is harder on us than falling back in November. The shift in spring is associated with an increase in heart attacks, and car accident rates also go up for a few days after, he said.
Permanent daylight saving time hasn’t worked well in the past
We’ve had daylight saving time for longer than eight months at a time before, and it wasn’t a big hit.
From February 1942 until September 1945, the U.S. took on what became known as “War Time,” when Congress voted to make daylight saving time year-round during the war in an effort to conserve fuel. When it ended, states were able to establish their own standard time until 1966 when Congress finally passed the Uniform Time Act, standardizing national time.
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