The answer is the mystery of the vernal equinox
With the change of the four seasons, the vernal equinox is coming. The vernal equinox is the midpoint of 90 days in spring and one of the 24 solar terms. Vernal equinox is an important solar term. As the saying goes, a year's plan lies in spring, and a day's plan lies in morning. You may not know much about the vernal equinox. Next, take a look with me.
The vernal equinox is the midpoint of 90 days in spring. One of the 24 solar terms, around March 20 of the Gregorian calendar every year, when the sun is located at 0 (vernal equinox) of the yellow meridian. On the vernal equinox, the sun shines directly at the equator of the earth, and the seasons in the northern and southern hemispheres are opposite. The northern hemisphere is the vernal equinox and the southern hemisphere is the autumnal equinox. The vernal equinox is a new year in Iran, Turkey, Afghanistan, Uzbekistan and other countries, with a history of 3,000 years.
The vernal equinox is also a festival and ritual celebration. The ancient emperors had a system of offering sacrifices to the sun in spring and the moon in autumn. The ritual of the Zhou Dynasty was to offer sacrifices on the altar. "Twenty-four solar terms": "In mid-February, it is divided into half, which is 90 days and a half, so it is called minutes." Another article, Spring and Autumn Stories, Yin and Yang in and out, said: "At the vernal equinox, Yin and Yang are also half-phase, so day and night are cold and summer."
Book of Rites: "Altar." Ying Da Shu by Confucius: "Also called vernal equinox". In the Qing Dynasty, Pan Rongbi wrote "Ji Sheng at the age of Emperor Jingdi": "The vernal equinox and autumn are divided into national gifts, and scholars should not worship them.
Folk activities are generally considered as the official start of an outing. Activities include: flying kites, women and children flying kites. And write a blessing on the kite, hoping that the gods in the sky can see it. Second, drink flowers: men, women and children should spend. Picking wild vegetables in the wild: Zhu's "Ten Miscellaneous Books in Spring: Writing and Playing the Piano" unintentionally inserted willows. In terms of diet, there are spring vegetables, spring soup and spring wine.