Spring And Fall Equinox 2025. Spring 2025 starts on thursday, march 20th in the northern hemisphere, with daylight time lengthening and the leaves begining show on the trees with the changing tilt of the earth's axis. The spring equinox, known as the vernal equinox in the northern hemisphere, is a day on which the sun sits directly over the equator, so day and night all over the world are of equal length.
We greet the first day of the new season with the spring equinox, but what is it, exactly? 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.