2021117 What is the lunar calendar?

Lunar calendar 202110 13 (2021year1October13), the zodiac is a cow.

Lunar calendar, the modern calendar in China, belongs to the combined calendar of yin and yang, that is, the combined calendar of lunar calendar and solar calendar. According to the change cycle of the moon phase, each moon phase changes to one month, and the reference solar year is the length of one year, 24 solar terms are added, and leap months are set to make the average calendar year adapt to the tropic year.

The combination of lunar calendar and solar calendar in lunar calendar forms the method of combining yin and yang. Because of the use of "Xia Zheng", it was called Li Xia in ancient times.