The lunar calendar originated in China thousands of years ago and was developed based on the movements of the sun and the moon. For a long time, it has played an important role in agricultural production and people's daily lives. The ancients used the lunar calendar to record dates and arrange farming activities, so as to make the most efficient use of natural resources and climatic conditions, thereby improving the yield and quality of crops. Traditional Chinese festivals such as the Spring Festival and the Mid-Autumn Festival are based on the lunar calendar. As an important part of Chinese traditional culture, the lunar calendar is still widely used today.