In ancient times, the vernal equinox was also called the vernal equinox. What does this mean?

The vernal equinox is the fourth solar term in spring among the 24 solar terms. There is an agricultural proverb among the people: "The vernal equinox and the autumnal equinox are equally divided day and night", and day and night are equal in length. According to our country's climate, it is generally spring between beginning of spring and Changchun, and the vernal equinox is in the middle of the two solar terms, which means that spring has already passed half, so it is also called "vernal equinox". There are many customs in the spring breeze, such as laying eggs, eating spring vegetables, sticking birds' mouths, flying kites and worshiping the Spring Festival. The moral of the vernal equinox is that the vernal equinox means that spring means that day and night are equally divided, and every day is 12 hour; In ancient times, it was spring from long summer in beginning of spring, and the vernal equinox happened to be in the three months of spring, and the spring was equally divided.