Vernal Equinox 2024 Edt. The northern hemisphere’s spring — or vernal — equinox can land between march 19 and 21, depending on the year. But why does the day mark the start of spring and why only in the northern hemisphere?.
On march 19, the vernal equinox will see spring come to the northern hemisphere as the sun reaches the spot where the ecliptic and celestial equator cross each other. It also lists astronomical sunrise and sunset timings on vernal equinox day.