Autumn Equinox 2024 Southern Hemisphere. In 2024, the first day of fall, also known as the autumnal equinox, is sunday, sept. It also lists astronomical sunrise and sunset timings on.
Autumn equinox 2024 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator,. (the reverse is true in the southern hemisphere, where the september equinox signals the.