The lunar calendar, which originated in China thousands of years ago, is made based on the movement of the sun and the moon. For a long time, the lunar calendar has played an important role in agricultural production and people’s daily lives. People in ancient times recorded dates and arranged farming activities based on the lunar calendar, so as to make the best use of natural resources and climate conditions, and improve the yield and quality of crops. The dates of traditional Chinese festivals such as Chinese New Year and Mid-Autumn Festival are based on the lunar calendar. The lunar calendar is an important part of traditional Chinese culture and is still widely used today.