Who invented the lunar calendar in China?

The inventor of the China lunar calendar is Wan Nian of the Xia Dynasty.

On the basis of the lunar calendar, he invented the perpetual calendar of yin and yang according to the running law of the sun, so later generations also called the lunar calendar perpetual calendar. The lunar calendar is a traditional calendar in China, which belongs to the combined calendar of Yin and Yang. Its years are divided into normal year and leap year, with the normal year being 12 months and the leap year being 13 months.

The lunar calendar considers the relationship between the sun, the moon and the earth. It is a fixed calendar with astronomical calendar characteristics, which can well correspond to various astronomical phenomena. There are only 29 days and 30 days in the lunar calendar, and the beginning of a year has a strong astronomical significance, which has the astronomical significance of Yin and Yang years.