Constellations are determined by the date of the solar calendar. 1July 24th, 976, the Gregorian calendar date is1August 9th, and the constellation of that day is Leo.
Lunar calendar: July 24th, 76.
Main branch: Guimao, Shen Bing, Chen Bing.
Gregorian calendar: 1976 August 19 Thursday Leo
Source: Hua.com.