Constellations are determined by the date of the solar calendar. 198 1 May of the lunar calendar 17 The solar calendar date is1June of 8, and the constellation of that day is Gemini.
Lunar calendar: May17th of the year.
Main branch: Wu Jia Ding Mao in Heart.
Gregorian calendar: 198 1 June 18 Thursday Gemini
Source: Hua.com.