Richard M. Bourget

First Day Of Spring 2025 Dates Texas. But why does the day mark the start of spring and why only in the northern hemisphere? 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.

Spring gets its official start tuesday, march 19, 2025, in the northern hemisphere. Eastern on tuesday, march 19, marking the start of spring for the northern hemisphere.