Twenty-four solar terms originated in the pre-Qin period.

Twenty-four solar terms originated from the Xia Dynasty in the pre-Qin period.

The earliest calendar is Xia Li, which is said to belong to Xia Dynasty. Shi Gan Xing Jing in the Spring and Autumn Period and the Warring States Period is the earliest astronomical work in China and even in the world. In the Western Han Dynasty, in 104 BC, the taichu calendar compiled by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms.