What Is Spring Equinox 2024. On the equinoxes, the earth's axis and orbit line up so both hemispheres. 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.

The vernal equinox arrives on tuesday, march 19, marking the start of the spring season for the northern hemisphere. In 2024, the official first day of spring is tuesday, march 19.