Vernal Equinox 2025. The vernal equinox — is an astronomical phenomenon when the sun, in its visible motion along the ecliptic, crosses the celestial equator. Learn why—and let’s celebrate the start of this most glorious season!
Edt on march 19, 2025, the sun crosses the celestial equator from south to north. At the equinox, the earth will have reached the point in its orbit where its axis is at right angles to a line from the sun.