The 24 Solar Terms Are Traditional Chinese Calendar System Used For What Purpose. Solar terms are divided according to the sun's annual motion in the ecliptic plane (the earth's orbit around the sun). 节气 is the point marking one of the 24 divisions of the solar year in the traditional chinese calendar.

Among the tools used for agricultural planning and development in ancient china, the 24 solar terms (二十四节气) played a crucial role. Each solar term has about 15 days and it is decided by the.