When Is Fall 2025 In Usa. Starts on september 22, 2025, at 8:44 am and lasts until december 21, 2025, at 4:21 am (93 days) 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 south and the length of day and night are almost the same.
Find out the date when autumn (or fall) is in 2025 and count down the days until autumn (or fall) with a countdown timer. Monday, sep 22 11:19 am pdt.