What is the relationship between the desk calendar and the lunar calendar?

The desk calendar is related to the lunar calendar. Lunar calendar, the traditional calendar of China. According to the cycle of the moon phase, each moon phase changes to one month. A tropical year is divided into 24 segments, forming 24 solar terms. By referring to the tropic year of the sun, leap months are set to adapt their average calendar year to the tropic year. The lunar calendar combines the lunar calendar with the solar calendar to form a method of combining yin and yang. A desk calendar refers to a calendar placed on a desk.