Vernal Equinox: Does this name mean that spring is already halfway through?

March 2 1 day is the vernal equinox among the 24 solar terms, and the vernal equinox solar terms begin when the sun runs to 0 degrees (vernal equinox). A day is half of spring, so it is called vernal equinox. On the vernal equinox, the sun shines directly at the equator, and day and night are almost equal. Then the direct sunlight position gradually moved northward, and the days were long and the nights were short.