Spring Equinox 2025 Usa Calendar

Spring Equinox 2025 Usa Calendar. The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day and night. Spring equinox 2024, 2025 spring vernal equinox.

Equinox means equal day and night (12 hours each). 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.