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What You Need to Know About the Autumnal Equinox

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The leaves are changing, pumpkin-themed menu items are back, and football is on your TV. Fall is back, baby!

The official first day of fall, also known as the autumnal equinox, is this weekend in the Northern Hemisphere. According to Encyclopedia Britannica, it is one of two days, the other being the vernal equinox, when the sun is directly overhead, dividing day and night into equal parts.

“On any other day of the year, either the Northern or Southern Hemisphere is tilted toward the sun, because the Earth’s axis is tilted 23.4 degrees,” Britannica reports. That means one hemisphere receives more sunlight than the other.

According to Britannica, from now until the winter solstice, which occurs on December 21, the days will get shorter and the nights will get longer.

Here’s what you need to know about when fall officially starts and how long it will last.

What are fall colors?: How Changing Leaves Create Spectacular Fall Colors

When is the first day of autumn?

The autumnal equinox is scheduled for Sunday, September 22 at 8:44 a.m. ET, according to the Old Farmer’s Almanac. The equinox arrives at the same time worldwide.

When is the first day of winter?

The first day of winter in the Northern Hemisphere is marked by the winter solstice, which is expected to occur on December 21 at 4:19 a.m. ET in 2024, according to the Old Farmer’s Almanac.

Gabe Hauari is a national trending news reporter at USA TODAY. You can follow him on X @GabeHauari or email him at [email protected].