First Day Of Autumn Day 2024. When is the first day of fall 2024? Edt) in the northern hemisphere.

22 is the first official day of the fall season — and some years (like 2023) the date lands on sept. 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.