Spring Equinox Time In 2025. The equinox is the time of year when the sun reaches its zenith at the earth’s equator, and the earth is perpendicular (in terms of the poles) to the sun’s rays. What is the spring equinox and what happens on this day?.
The first day of spring 2025 is on thursday, march 20, 2025, at 5:01 a.m. 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.