When Does Fall Start 2024 Usa. When is the first day of fall 2024? This year the autumn will start on sunday september 22, 2024 (day of the fall equinox) and will end on saturday december 21, 2024 with the winter solstice.
When is the autumnal equinox? In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.