Fall Season 2024 Starts In Which State. The autumnal equinox for the northern hemisphere and the first day of fall begin on the same day, at 8:44 a.m. It is the fall’s first chill:

The autumnal equinox for the northern hemisphere and the first day of fall begin on the same day, at 8:44 a.m. In 2024, this happens on september 22, at 12:44 gmt.