1988 What is the fourth day of the ninth lunar month?

Chen Wunian July 24th. According to the Gregorian calendar,1September 4th, 988 (1September 4th, 988) is the lunar calendar date: July 24th, Chen Wunian. Lunar calendar is the current traditional calendar in China, which 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, taking the solar tropical year as the length of a year, and adding 24 solar terms and setting leap months to make the average calendar year adapt to the tropical year.