Who established the 24 solar terms?

The list of 24 solar terms is a list of 24 specific festivals in China calendar, and each solar term has its own unique meaning. It accurately reflects the change of natural rhythm and plays an extremely important role in people's daily life. [29]

The twenty-four solar terms were originally formulated according to the changes of stars. The Big Dipper rotates circularly, and bucket handle rotates clockwise once, which is called one of the "years old". At present, the establishment of the twenty-four solar terms is based on the "annual apparent movement of the sun", which is also the degree of the yellow meridian of the sun. Although they are established in different ways, the cause of the struggle is that the earth revolves around the sun, so the time of their intersection is basically the same. [26]

"Twenty-four solar terms" is the product of ancient farming civilization, and farming production is closely related to the rhythm of nature. It is a knowledge system formed by ancient ancestors following the farming season and observing the movement of celestial bodies to understand the changing laws of seasons, climate and phenology in a year. Each solar term represents different changes in climate, phenology and time. In the historical development, the 24 solar terms have been incorporated into the lunar calendar and become an important part of the lunar calendar.