First Day Of Fall 2024 Date And Time Usa. The fall equinox is not on the same day each year, though it always falls between september 21. The fall equinox and the first day of autumn arrives on sunday, september 22, 2024, at 08:44 a.m.

The fall equinox and the first day of autumn arrives on sunday, september 22, 2024, at 08:44 a.m. In 2024, the fall equinox will be sunday, september 22, according to almanac.com.