Autumn 2024 In Usa. In the southern hemisphere, the autumnal equinox. Autumn 2024 starts on sunday, september 22nd in the northern hemisphere, with daylight time shortening and the leaves begining to fall with the changing tilt of the earth's axis.

Find out the date, how long in days until and count down to till autumn (or fall) 2024 with a countdown clock. Here’s everything you should know about the fall equinox—plus our favorite fall facts, folklore, photos, and more!