When Is The First Day Of Fall 2024. The first day of winter in the northern hemisphere is marked by the winter solstice, which is expected to arrive at 3:19 a.m. First day of fall in 2024 is on sunday, the 22nd of september (22/9/2024).

Pacific daylight time) autumn begins astronomically in. Today is the first day of fall 2024 in which the sun will lie directly above the equator—giving every city in the world roughly equal hours of day and night.