Spring Solstice 2024 Time. 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. When do the four seasons start in 2024—for spring, summer, fall, and winter?
On the equinoxes, the earth’s axis and orbit line up so both hemispheres get the same amount. When is the spring equinox 2025?