Autumn Equinox 2024 Australian Calendar. 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, moving from the. Spring equinox 20 march, summer solstice 21 june, autumn equinox 22 september, winter solstice 21 december.

The autumn equinox is sometimes referred to as the september equinox. It also lists astronomical sunrise and sunset timings on autumnal equinox.