Spring Equinox 2025 Date. 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. 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 the northern hemisphere, the spring equinox will take place on march 20, 2025, at 09:02 gmt (05:02 a.m. In 2025, the spring equinox—aka the first day of spring—occurs on tuesday, march 19, 2025.