Spring Equinox 2024 Usa 2024. Spring equinox 2024 (beginning of astronomical spring) 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.

The start of astronomical spring, known as the vernal equinox, occurred yesterday, march 19, 2024, at 11:06 p.m. 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.