During the equinox, the Earth’s axis and its orbit line up so that both hemispheres get an equal amount of sunlight. The Northern Hemisphere’s spring – or vernal – equinox can land between March 19 and 21. Its fall – or autumnal – equinox can be between Sept. 21 and 24.

Did you know both the astronomical first day of spring and Easter Sunday are tied to the spring equinox? How they relate, what to know for spring 2025.