Spring Equinox 2025 Usa. Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic. Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic.

Equinox means equal day and night (12 hours each). It also lists astronomical sunrise and sunset timings on vernal equinox day.