First Day Of Spring 2024 Date. This is also the start of the vernal equinox. Summer starts at the moment when the sun is farthest.
Spring equinox takes place on march 20, 2025, in the northern hemisphere, and on september 22, 2024, in the southern hemisphere. Summer begins with the summer solstice, thursday, june 20, 2024, 4:51 p.m.