First Day Of Spring 2025. This date marks the spring equinox in the northern hemisphere. From this page you can answer questions such as:
The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day and night are almost the same. For those of us in the northern hemisphere, this was marked by the arrival of the vernal equinox (otherwise known as the “first point of aries“).