date calculation

The twenty-four solar terms are closely related to the lunar calendar and do not exist independently. The divisions of solar terms are based on the position of the sun on the ecliptic, while the lunar calendar is based on the cycles of the moon. Although the calculation of solar terms is related to the movement of the sun, its application is closely integrated with agricultural activities, and the date of the lunar calendar affects the actual location of the solar terms. Therefore, to understand the solar terms, you must refer to the lunar calendar in order to accurately grasp their time. Otherwise, calculating solar terms based only on the movement of the sun will be out of touch with practical applications.