Fall Equinox 2024. The official first day of fall is officially sunday, september 22, 2024. For autumnal equinoxes for the next 12 years scroll down the page.
The first day of astrological fall coincides with the autumnal equinox, wherein the length of day and night are equal and the sun is directly overhead at the equator. The fastest loss of daylight occurs around the fall equinox on sept.