Constellations are determined by the date of the solar calendar. On the seventh day of the lunar calendar 199 1 August, the Gregorian calendar date is September 14, and the constellation of that day is Virgo.
Lunar calendar: noon on the seventh day of August in Xin Weinian.
Eight characters: Wei Xin Ding You Ding Hai Wu Bing
Gregorian calendar: 199 1 September 14 Saturday Virgo.
Source: Hua. com