Time is ticking on Daylight Saving Time 2023.

The end of DST is about a week away. It officially ends at 2 a.m. on Sunday, Nov. 5, 2023 when clocks “fall back” one hour and we move more daylight into the morning hours for what’s known as “standard time.”

The amount of daylight will continue to decrease each day until Dec. 21 when the winter solstice arrives and the amount of daylight shifts again. We will be living with dark afternoons until March 10, 2024 when DST starts again. It will end on Nov. 3, 2024.

Under federal law, DST begins on the second Sunday in March and runs through the first Sunday in November.

It’s not observed everywhere, however.

Arizona – with the exception of the Navajo Nation – does not observe DST. According to reports, the reason is the state’s extreme heat. If Arizona did observe DST, the sun would stay out until 9 p.m. in the summer, making nighttime activities difficult and making heat even more of an issue.

“According to a 2007 article in the Arizona Daily Star, the simplest answer is that most of Arizona doesn’t need an extra hour of sunlight in the evening. When the temperature is more than 100 degrees, desert residents are often grateful for sunset and don’t want to wait an extra hour for it during the summer,” Tucson.com reported.

The Navajo Nation, which stretches from northeastern Arizona, to northwestern New Mexico and southeastern Utah, does observe DST.

Hawaii also skips changing the clocks. In that case, it’s the state’s relative proximity to the equator, meaning the sun rises and sets around the same time each day, which makes changing the clocks unnecessary. The same reason applies to U.S. territories Puerto Rico, Guam, American Samoa and the U.S. Virgin Islands, which also skip DST.

Multiple states, including Alabama, have backed doing away with the twice-yearly time change. You can see more on those efforts here.