Which country invented the lunar calendar?

Lunar calendar is the current traditional calendar in China. According to the change cycle of the moon phase, each moon phase changes to one month, the reference year of the sun is one year, and 24 solar terms are added, and leap months are set to adapt the average calendar year to the tropic year.

Each lunar month reflects a complete cycle of lunar phase change, so it belongs to the lunar part of the yin-yang calendar. The twenty-four solar terms of the lunar calendar reflect the different positions on the earth's orbit around the sun, that is, the tropic year cycle, so it belongs to the solar calendar part of the lunar calendar.

Advantages of the lunar calendar

The lunar calendar has only 29 days and 30 days, which is determined by the date of the first month of the lunar calendar. Human factors are small and it is not easy to change at will. The beginning of a year has a strong astronomical significance, with the astronomical significance of Yin and Yang years. The combination of yin and yang can best reflect the traditional culture of the Han nationality, which is the unity of heaven and man and the coexistence of yin and yang.