Autumn Begins 2024 Date. The first day of fall is sunday, september 22, 2024—the same day as the autumn equinox—in the northern hemisphere. In the northern hemisphere, the autumnal equinox takes place on september 22, 2024, at 12:44 gmt (08:44 a.m.

The autumnal equinox occurs in september each year, and in the northern hemisphere the date marks the end of summer and beginning of autumn. The date varies slightly year to year, but it is.