First Day Of Spring 2024 Date Usa. But why does the day mark the start of spring and why only in the northern hemisphere?. The first day of spring in the northern hemisphere is falling on march 19, 2024, marking the beginning of the vernal equinox.
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. This is also the start of the vernal equinox.
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