What'S The First Day Of Spring 2024. The equinox does not always fall on the same day each year due to the fact that the earth. The northern hemisphere’s spring — or vernal — equinox can land between march 19 and 21, depending on the year.

Traditionally, the first day of spring is marked by the spring equinox, which falls in march every year. But why does the day mark the start of spring and why only in the northern hemisphere?.