March Equinox 2025 Date. In the southern hemisphere, it will occur on september 22, 2025, at 12:44 gmt (07:44 a.m. June 20, 2025 at 1:51 pm pdt :

(march) equinox, the sun crosses the celestial equator, moving along the ecliptic. June 20, 2025 at 1:51 pm pdt :