Spring Equinox Time In 2025. In the northern hemisphere, it marks the first day of. In the southern hemisphere, the.

Autumnal/fall equinox north of the equator is mirrored south of the equator by the spring equinox. 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.