When Is Spring Solstice 2024. Equinoxes — in march and september. The spring equinox is tuesday, march 19 and brings the first day of astronomical spring to the northern hemisphere.

Autumnal/fall equinox north of the equator is mirrored south of the equator by the spring equinox. In 2024, the march equinox happens on march 19 at 11:06 p.m.