When Is The First Day Of Fall 2024. When do the four seasons start in 2024—for spring, summer, fall, and winter? In 2024, this happens on september 22, at 12:44 gmt (08:44 a.m.

What is the fall equinox? In 2024, this happens on september 22, at 12:44 gmt (08:44 a.m.