What is the origin of the 24 solar terms?

The origin of the twenty-four solar terms was formulated by ancient people according to the change of the position of the earth on the ecliptic. Each solar term corresponds to a position where the sun reaches every time it runs 15 degrees on the ecliptic. The twenty-four solar terms take the earth's revolution around the sun as a cycle, which basically summarizes the different positions of the sun on the ecliptic at different times of the year.

The exact time of cold coming and summer going, the regularity of natural phenomena such as rainfall and snowfall, and the time of recording some phenological phenomena in nature.

Climate type

Twenty-four solar terms are the product of agricultural civilization and the knowledge system formed by ancient ancestors by observing celestial movement combined with geographical climate and phenological laws. Agricultural production is closely related to geographical and climatic resources, and superior geographical and climatic resources are important conditions for the birth of agricultural civilization.

Monsoon climate is a mixture of continental climate and maritime climate. Winter is cold, dry and rainy, and summer is affected by warm and humid air flow from the ocean. It is a very superior climate resource in China, with high temperature, high humidity and rainy weather, abundant sunshine and abundant precipitation.

The high temperature period is consistent with the rainy period, and the water and heat match well, which is very beneficial to the growth of crops. Climate factors include illumination, temperature and precipitation, among which precipitation is an important factor of climate. Twenty-four solar terms accurately reflect the changing law of natural rhythm and play an extremely important role in ancient agricultural production.