What'S The First Day Of Fall 2024. The autumnal equinox, usually occurring on september 22 or 23, means fall is officially here. The first day of autumn often called fall (september equinox or autumnal equinox) is when the sun shines directly on the celestial equator passing from north to.

5 p.m., last day of open registration for fall 2024 classes. The official first day of fall is officially sunday, september 22, 2024.