Fourteen solar terms, how old, urgently needed. . . . . . . . . .

Twenty-four solar terms, a supplementary calendar to guide farming in ancient China, were formed in the Spring and Autumn Period and the Warring States Period. The Spring and Autumn Period and the Warring States Period (770 BC-22 BC1year) is also called the Eastern Zhou Dynasty. So the 24 solar terms have a history of about 2500 years. Hope to adopt.