March Equinox 2025

March Equinox 2025. On the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic. The spring equinox (as well as autumnal equinox) is the moment when neither of the earth’s hemispheres is inclined towards or away from the sun.

Here’s what to look for. 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.