First Day Of Spring 2025 Canada. 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. This date marks the spring equinox in the northern hemisphere.

The spring equinox is tuesday, march 19 and brings the first day of astronomical spring to the northern hemisphere. This year it starts on march 19 2025, at 11:06 p.m.