When Is First Day Of Fall 2024. 22, 2024 — but don't expect crisp temperatures and a rainbow of foliage as soon as late september hits.  — the fall equinox is the first day of autumn in the northern hemisphere.

Seasons divide the year into four distinct periods of time named spring, summer, autumn/fall, and winter. First day of fall in 2024 is on sunday, the 22nd of september (22/9/2024).