February 20222 18 lunar writing method

The eighteenth day of the first month.

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. The lunar calendar combines the lunar calendar with the solar calendar to form a method of combining yin and yang.