When Is The First Day Of Fall 2024 Usa. 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. As the first day of fall 2024 usa approaches, there’s so much to look forward to this season.

In the northern hemisphere, the fall months are from the end of september, through. H ere are five things to know about the fall, or autumnal, equinox: