When Is Spring Solstice 2025 In 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. In 2025, astronomical spring in the northern hemisphere will begin on march 20 at 09:02 utc and in the southern hemisphere โ on september 23 at 06:20 utc.
The equinox is the time of year when the sun is at. Summer starts at the moment when the sun is farthest north: