Equinox 2025 Solar. At the equator, the sun is directly overhead at noon on these two equinoxes. On march 19, the vernal equinox will see spring come to the northern hemisphere as the sun reaches the spot where the ecliptic and celestial equator cross.

The 2025 fall equinox—also called the autumn equinox—takes place on sunday, september 22, 2025. The equinox and solstice define the transitions between the seasons of the astronomical calendar and are a key part of the earth’s orbit around the sun.