First Day Of Fall 2024 Usa. According to the farmers almanac, the first day of fall is sunday, sept. The first day of astrological fall coincides with the autumnal equinox, wherein the length of day and night are equal and the sun is directly overhead at the equator.
With it come pumpkin spice lattes and harvest decorations lining store aisles. Here are the equinox and solstice dates—plus, answers to common questions.