First Day Of Spring 2024 California

First Day Of Spring 2024 California. 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 winter solstice will also fall on dec.

But why does the day mark the start of spring and why only in the northern hemisphere?. Seasons divide the year into four distinct periods of time named spring, summer, autumn/fall, and winter.