When Does Spring Start Northern Hemisphere

When Does Spring Start Northern Hemisphere. The northern hemisphere's spring—or vernal—equinox can land between march 19 and 21, depending on the year. Begins on the vernal equinox (20 march) 12 hours of sunlight everywhere.

It may not feel like it in the chilly united states, but it’s the first day of spring in the northern hemisphere. In fact, we even know the precise time.