Remember to set your clocks back one hour Saturday night as we return to standard time early Sunday morning. Daylight Saving Time ends at 2 AM Sunday, November 1, 2026. It is also a good idea to change the batteries in your smoke detectors and carbon monoxide detectors.

Daylight saving time runs from the second Sunday in March to the first Sunday in November. The U.S. government first enacted daylight saving time in 1918 as a way to conserve coal during World War I. The practice became law in 1966 with the federal Uniform Time Act.

Hawaii and most of Arizona (except the Navajo Nation) are the only two states that don’t observe daylight saving time. The U.S. territories of American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands also don’t observe daylight saving time.

Most smartphones, computers, and smart TVs update automatically, but you will need to manually adjust analog clocks, older digital alarm clocks, and car or appliance clocks.

Status of Permanent Daylight Saving Time:
President Donald Trump has made it clear he wants to eliminate the current iteration of daylight saving time. But despite the U.S. House of Representatives passing the Sunshine Protection Act, it’s unclear when—or if—the Senate will give its stamp of approval, which is necessary to make it into law.

So we’ll get an extra hour of sleep?
Yes—but although getting an extra hour of shut-eye sounds good, according to a growing consensus of health care providers, it actually may do more harm than good.

While the majority of Americans (56%) favor making daylight saving permanent, a growing chorus of scientists and doctors disagree—including those from the American Academy of Sleep Medicine and Stanford Medicine. These health care professionals argue that sticking to permanent standard time is healthier because it doesn’t disrupt the body’s natural circadian rhythm, which can lead to all sorts of health problems, including higher rates of stroke and obesity.

Not Everyone Changes their Clocks

Actually, the majority of the world does not observe Daylight Saving Time (DST); only about 70 countries—mostly in North America, Europe, and parts of the Southern Hemisphere—change their clocks.

Earlier this year in Canada, British Columbia, Alberta, Manitoba, and the Northwest Territories have joined Yukon and Saskatchewan in abandoning the biannual clock change to observe permanent daylight saving time.

Most of Mexico does not observe Daylight Saving Time. Mexico permanently ended nationwide Daylight Saving Time on October 30, 2022. Most of the country, including major hubs like Mexico City, stays on standard time all year. However, a few specific regions follow the U.S. DST schedule to stay aligned with American trade and border cities:

  • Baja California: The entire state observes DST.
  • Northern Border Municipalities: Specific cities and towns in border states—including parts of Chihuahua (such as Ciudad Juárez and Ojinaga), Coahuila, Nuevo León (Colombia), and Tamaulipas (such as Reynosa and Matamoros)—follow the DST schedule.
  • Sonora: Keeps Mountain Standard Time year-round to match neighboring Arizona.
  • Quintana Roo: Keeps Eastern Standard Time year-round.

Where Else DST is Not Observed

  • Most of Asia, Africa, and the Middle East: Stay on standard time year-round because day length near the equator changes very little across the seasons.
  • South America: Most countries (such as Argentina and Brazil) do not use DST.
  • Oceania: While parts of Australia (like New South Wales and Victoria) and New Zealand observe DST, Western Australia, the Northern Territory, and Queensland do not.
  • United States Exceptions: Hawaii, most of Arizona (except the Navajo Nation), and U.S. territories (Puerto Rico, Guam, American Samoa, and the U.S. Virgin Islands) skip DST.
  • Canada & Mexico: Large parts of Saskatchewan, portions of British Columbia, and other regional pockets do not change their clocks.

Why Most Places Skip It

  • Equatorial Proximity: Regions closer to the equator experience consistent sunrise and sunset times all year, making time shifts unnecessary.
  • Energy and Economic Concerns: Many regions found that changing clocks did not actually save energy or that the disruption to health, sleep cycles, and daily scheduling outweighed the benefits.