First Day Of Fall 20254 2025 Usa. The first day of fall in 2024 arrives with the fall equinox on sunday, september 22, 2024, at 8:44 a.m. Here's everything you should know about the fall equinox—plus our favorite fall.
In 2025, the autumnal equinox for the northern hemisphere will be on monday, september 22. When is the first day of fall?