Stewart Parr

1st Day Of Spring 2025 Usa. When do the four seasons start in 2025—for spring, summer, fall, and winter? 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.

This year it starts on march 19 2025, at 11:06 p.m. The first day of spring is march 20, 2025, at 5:02 a.m.