March 2025 Spring Equinox. What are the spring months 2025? 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, the vernal equinox occurred on march 19, signaling the start of spring in the northern hemisphere (and fall in the southern hemisphere). This year, the spring equinox falls on wednesday 20 march, and the astronomical spring lasts until the summer solstice.