First Day Of Spring Of 2024. In 2024, the spring equinox—aka the first day of spring—occurs on tuesday, march 19, 2024. The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day.

The spring equinox begins on march 20, which is the first day. On the equinoxes, the earth’s axis and orbit line up so both hemispheres get the same amount.