The constellation is determined by the date of the solar calendar. In 2000, the Gregorian calendar date of the 10th day of the seventh lunar month was August 9th, and the constellation of that day was Leo.
Lunar calendar: 10th day of July in Chen Geng.
Main branch: Geng Shen Jihai
Gregorian calendar: Wednesday, August 9, 2000
Source: Hua Wang.