Constellations are determined by the date of the solar calendar. The Gregorian calendar date of July 1996 is August 25th, and the constellation of that day is Virgo.
Lunar calendar:1July 996 12.
Main branch: Bingzi, Shen Bing and Wu Jia.
Gregorian calendar:1August 25th, 996 Virgo.
Source: Hua.com.