When Is The 1st Day Of Fall 2024 In Us. When is the first day of fall 2024? By nbc new york staff • published september 20, 2024 • updated on september 20, 2024 at 6:47 pm.

According to the national weather service, the exact time is 6:44 a.m. In 2024, this happens on september 22, at 12:44 gmt (08:44 a.m.