September Equinox 2024au. To be specific, fall will officially begin in the northern hemisphere at 8:43 a.m. โ aquarius horoscope for september 2024.
Spring equinox 2024 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic. On the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the northern hemisphere to the southern.