Spring Equinox 2025 Northern Hemisphere Calendar

Spring Equinox 2025 Northern Hemisphere Calendar. The spring equinox, known as the vernal equinox in the northern hemisphere, is a day on which the sun sits directly over the equator, so day and night all over the world are of equal length. The march equinox marks the beginning of spring in the northern hemisphere and the first day of fall in the southern hemisphere.

When is the first day of spring 2025? Learn about the changing of the seasons here.