First Day Of Spring

This date marks the “spring equinox” in the Northern Hemisphere. What IS the spring equinox and is it always on the 20th? Before you try to balance that egg, read on to learn more—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 and night are almost the same. This is referred to as astronomical spring or the March equinox or vernal equinox.