What is the origin of the vernal equinox?

The vernal equinox is one of the traditional 24 solar terms in China, which marks the official start of spring. The name of the solar vernal equinox comes from a concept in ancient astronomy, that is, the sun shines directly at the equator of the earth at the vernal equinox, when the length of day and night are equal, with the length of day being 12 hour and the length of night being 12 hour, so it is called "vernal equinox".

The origin of vernal equinox solar terms can be traced back to ancient times. In ancient agricultural society, people began to make plans for agricultural activities according to the position of the sun very early. The vernal equinox season is in the middle of spring, the temperature gradually warms up, the earth begins to thaw, and trees and flowers begin to recover, which is an important period for farming and planting in spring. At the vernal equinox, people will hold sacrificial activities to thank nature for its harvest and life.

In modern society, although people's lifestyles have changed greatly, the solar terms and vernal equinox are still widely celebrated and commemorated. It symbolizes a new beginning and hope, and makes people feel the power of life and infinite possibilities.