Effects of daylight saving time on health and sleep
Neuroscientist Dr. Karin Johnson discusses daylight saving time and its potential impacts with LiveNOW’s Andy Mac.
In many states in the USA, the time changes twice a year. In the spring, the clocks are set forward one hour to begin daylight saving time, and in the fall, the clocks are set back one hour to end it.
For early risers, this means an extra hour of rest before the alarm goes off, but for many employees, the sun sets in the evening before they even leave the office.
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Here’s what you should know about the end of daylight saving time in 2024:
What is daylight saving time?
FILE – People walk past the lighthouse in Burnham-on-Sea, Somerset. (Photo by Ben Birchall/PA Images via Getty Images)
Daylight saving time is defined as the period between spring and fall when clocks in most parts of the country are set one hour ahead of standard time. By federal law, it always begins on the second Sunday in March and ends on the first Sunday in November.
The practice of changing the clocks began in the United States in 1918 during World War I as a way to conserve fuel. Proponents believed that by changing the clocks by one hour, the country could give some of the electricity generated by coal-fired power plants to the military instead of using it for home electricity for an hour. This practice was repeated during World War II.
When will the time change this fall?
Daylight saving time 2024 began on March 10, 2024, when the clocks went back from 2 a.m. to 3 a.m. It will last until early Sunday, November 3, 2024, when 2 a.m. becomes 1 a.m.
In which states is there no daylight saving time?
The list of states and territories that will not change their clocks on November 3 includes:
- Hawaii
- Arizona
- Areas in American Samoa
- Guam
- Northern Mariana Islands
- Puerto Rico
- US Virgin Islands
Is daylight saving time observed outside the USA?
Yes. There are other countries that observe daylight saving time.
Daylight saving time applies in almost all of Europe, with the exception of Armenia, Azerbaijan, Belarus, Georgia, Iceland, Russia and Turkey.
It is also observed in parts of Canada, Latin America, the Caribbean and Australia. Egypt is the only country on the African continent that observes daylight saving time.
