Equinox 2024 Dates. 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. On this date, the day is equal.
Plan your year with these essential astronomical highlights. The equinoxes occur around march 20 and september 22 each year, corresponding to an equal length of day and night.