What Day Is The Autumnal Equinox 2024 Dates. The fall equinox is not on the same day each year, though it always falls between. The equinoxes occur around march 20 and september 22 each year, corresponding to an equal length of day and night.
During the autumnal equinox, day and night are approximately equal in length, lasting around 12 hours each. The equinox arrives at the same.