What Is Spring Equinox 2025 Mean. March 19 celebrates the arrival of the annual astronomical event, signally season. Maybe it seemed like it between the.

The spring equinox is tuesday, march 19 and brings the first day of astronomical spring to the northern hemisphere. The spring equinox (march 19, 2025) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare moment of equal night.