First Day Of Spring 2024 Events 2024. The equinox does not always fall on the same day each year due to the fact that the earth orbits the sun on a slightly elliptical path, meaning that the. Science mar 19, 2024 11:43 am est.

Summer begins with the summer solstice, thursday, june 20, 2024, 4:51 p.m. This is also the start of the vernal equinox.