First Day Of Fall 20254 2025 Dates

First Day Of Fall 20254 2025 Dates. In 2025, the autumnal (fall) equinox arrives on monday, september 22, marking the official first day of fall. On the equinoxes the sun shines directly on the equator and the length of day and night is nearly.

All times shown are eastern times, with adjustments made for daylight and. In 2025, the autumnal (fall) equinox arrives on monday, september 22, marking the official first day of fall.