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International Business Times UK
International Business Times UK
World
Giuliano de Leon

First Day of Fall 2025: 8 Fun Facts About the Autumnal Equinox on September 22

Autumnal equinox. (Credit: Mark Gunn/Flickr)

Autumn officially begins in the Northern Hemisphere on Monday, 22 September, as the autumnal equinox ushers in the first day of fall.

At this celestial milestone, the sun crosses directly over the equator, creating almost equal hours of daylight and darkness across the world.

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