2024 Spring Equinox Timeline. In the southern hemisphere, the spring equinox takes place on september 22, 2024, at 12:44 gmt (07:44 a.m. 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.
Autumnal/fall equinox north of the equator is mirrored south of the equator by the spring equinox. We celebrate the september equinox as the first day of autumn for the northern hemisphere, and the first day of spring for the southern hemisphere.