Equinox 2024. The equinoxes occur around march 20 and september 22 each year, corresponding to an equal length of day and. Equinoxes and solstices are two of the most important celestial events on earth.

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 equinoxes occur around march 20 and september 22 each year, corresponding to an equal length of day and.