Why is the eighth day of the ninth lunar month in 2022 a unitary month?

The full moon generally refers to the eighth month of the lunar calendar. This year's full moon exactly refers to August 12 to September 12 of the lunar calendar. According to numerology, the Millennium in August of the lunar calendar 12 is considered as a single month after the Millennium. ) Because the eighth day of September falls between August 12 and September 12, the eighth day of September is considered as a single month.