When Is The Autumn Equinox 2024. The first day of fall in 2024 arrives with the fall equinox on sunday, september 22, 2024, at 8:44 a.m. In the northern hemisphere, the autumnal equinox happens on september 22, 2024, at 12:44 gmt (08:44 a.m.
In the northern hemisphere, these are known as the spring, or vernal, equinox and the fall, or autumnal, equinox. Autumnal/fall equinox north of the equator is mirrored.
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