What Month Is Autumn 2025. Find out the date, how long in days until and count down to till autumn (or fall) 2025 with a countdown clock. The first day of fall in 2025 is sunday, sept.

In 2025, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall. Find out the date, how long in days until and count down to till autumn (or fall) 2025 with a countdown clock.