2024 Equinox. 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 fall equinox is an important way to mark earth's annual journey around the sun.
The fall equinox is not on the same day each year, though it always falls between september. 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.