First Day Of Spring 2025 Australia. 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. The spring equinox (march 19, 2025) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare moment of equal night across.

The official start of spring in australia is on september 1st, marking a delightful shift from the cooler months to warmer days. When is spring in australia.