Daylight saving ends Sunday. Here's what you need to know.

New Mexicans will travel to the past early Sunday.

Daylight saving time ends on Sunday, signaling the start of earlier darkness and an extra hour of sleep. On Nov. 3 at 2 a.m., the hands of time will fall back an hour, turning clocks back to 1 a.m. Sunrise will begin one hour earlier than the day before, bringing more light in the morning.

Daylight saving time originated in 1918 during World War I as part of the Standard Time Act — an act created by President Woodrow Wilson to conserve energy resources and add more daylight hours. It became year-round during World War II, known as War Time, as another effort to conserve resources and remained until the end of the war.

From 1945-1966, states and cities were free to observe it on their own accord until the Uniform Time Act went into effect in 1967, which mandated that it would begin nationwide on the same date. The only exception to this rule were states that declared laws exempting them from following the time change.

It wasn’t until 1986, when President Ronald Reagan extended the clock, that it became the standard March through November months still observed today.

In 2023, Sen. Martin Heinrich, D-N.M, reintroduced the Sunshine Protection Act — a bipartisan-supported bill led by Sen. Rubio Marco, R-Fla. — that would make it permanent. The bill was referred to the Committee on Commerce, Science and Transportation. The bill was introduced in 2018 and has failed to pass four separate times since.

However, neighboring Arizona — minus the Navajo Nation, which continues to observe daylight saving time — does not observe it and follows the same clock year-round. Hawaii does not follow it either because its location is so close to the equator that the amount of sun does not vary often.

How will it affect me?

The adjustment from different clock settings can affect people in a variety of ways. According to an article published by Johns Hopkins Bloomberg School of Public Health, surveys from the American Academy of Sleep Medicine found about 63% of Americans would prefer to eliminate DST, and 55% experience tiredness following the switch.

Circadian rhythms — the body’s 24-hour cycle, including the sleep-wake cycle — are thrown off because of the change of exposure to light. This can make your body feel more tired in the morning and wide awake at night.

The study also found people living on the western edges of time zones — who get light later in the morning and evening — are more at risk for misalignment.

Previously, it was thought to improve mental health because of the additional daylight in the afternoon. Studies show an 11% increase in depressive episodes during the transition to a new time setting.

A 2020 study found that the switch raises the risk of fatal traffic accidents by 6%.

Sleep experts recommend a few tips to adjust to saving time ending, including going to sleep earlier and letting more sunlight into your bedroom in the morning to let your body adjust naturally. Health experts also say to reduce screen time in the evenings to improve sleep.