When Is The 1st Day Of Fall 2024 Calendar. 22, 2024, in the northern hemisphere. This year, the first day of fall is sunday, sept.
— the first day of fall in 2024 is sunday, sept. — 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.