First Day Of Spring 2025 Date Usa. Each season brings different weather, hours of light, and. Spring is one of the four temperate seasons, the transition period between winter and summer.
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. The first day of spring in the gregorian calendar is typically march 20 or 21, while the first day of spring in the julian calendar is march 25 or 26.