First Day Of Spring 2024 Countdown Calendar. The seasons are defined as spring (march, april, may), summer (june, july, august), autumn. The equinox does not always fall on the same day each year due to the fact that the earth orbits the sun on a slightly elliptical path, meaning that the

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. When is the first day of spring?