Fall Equinox 2024. At an equinox, the sun appears directly above earth’s equator. Check autumnal equinox date and time in 2025.
In 2024, the equinox occurs on march 20, at 03:07 gmt (march 19, 11:07 p.m. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.