Fall Season 2024 Starts. When is the first day of fall 2024? Usually, when we talk about the first day of autumn we are referring to the astronomical autumn which is defined by the earth's axis and.
The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd. 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.