When Will Spring Start 2025. The vernal equinox falls on march 20, marking. Spring 2025 starts on thursday, march 20th in the northern hemisphere, with daylight time lengthening and the leaves begining show on the trees with the changing tilt of the earth's.
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. As milder weather returns to the midwest, here’s what to know about the official start of spring in 2025.