When Will The Fall Equinox Happen 2024. The first day of fall is sunday, september 22, 2024—the same day as the autumn equinox—in the northern hemisphere. The fall equinox, which starts libra season, is on sunday, september 22, 2024.

September’s full moon is also considered the second of four consecutive supermoons expected in 2024, according to nasa. 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,.