First Day Of Fall 2024 Equinox. But we consider the sun to be rising when the lip of it just comes. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.

Cdt) and will last until the winter solstice on saturday,. Here’s everything you should know about the fall equinox—plus our favorite fall facts, folklore, photos, and more!