Autumn 2025 Date. It is also called the autumnal equinox, fall equinox or the beginning of autumn. In 2025, the autumnal (fall) equinox arrives on monday, september 22, marking the official first day of fall.
Sydney the exact moment of the autumnal equinox in 2025 is 21 june, at 12:42:02. Find out the date when autumn (or fall) is in 2025 and count down the days until autumn (or fall) with a countdown timer.