Spring Equinox 2025 Date San Diego. The northern hemisphere’s spring — or vernal — equinox can land between march 19 and 21, depending on the year. 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. The online calculator determines the time and date foe summer and winter solstice and spring and autumn equinox.