First Day Of Spring 2025 Dates 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. When is the first day of spring in 2025 happening?

The first day of spring is march 20, 2024, at 5:02 a.m. Vernal / spring equinox 2025.