Fall Equinox 2024 Date 5. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall. In different time zones, the date of the equinox may differ by a day, so it is important to indicate your exact location.
|the fall equinox is not on the same day each year,. The fall equinox is on sunday september 1, 2024 to saturday october 5, 2024.