Date Of Equinox 2024. The march equinox, also known as the vernal equinox, every year marks the transition to spring in the northern hemisphere and autumn in the southern hemisphere. 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.
In 2024, the official first day of spring is tuesday, march 19. The equinox in the northern hemisphere occurs twice a year around 20 march (the spring equinox) and around 22 september (the autumn equinox).