What is the constellation of August 20th in the lunar calendar?

According to the perpetual calendar, Libra.

Its origin can be traced back to the Xia Dynasty, so it is also called "Li Xia". The lunar calendar is a calendar based on the lunar calendar (summer calendar) and incorporating solar calendar elements. Strictly speaking, the lunar calendar in our country should not be called lunar calendar, but a combination of yin and yang. Years are divided into normal years and leap years. An average year is twelve months; A leap year is thirteen months.