Constellations are determined by the date of the solar calendar. 1August, 984 15 The solar calendar date of that day is 10 September, and the constellation of that day is Virgo.
August 15th of the lunar calendar, Year of the Rat.
Main branch: Jiazi Gui You Ding Wei
Gregorian calendar: 1984 September 10 Monday Virgo
Source: Hua Wang.