Constellations are determined by the date of the solar calendar. 1March 23, 997 The Gregorian calendar date is April 29, and the constellation of that day is Taurus.
Lunar calendar: March 23rd, the year of Ding Chou.
Dry branches: Ding Chou Chen Jia Xin Chou
Gregorian calendar:1Tuesday, April 29th, 997 Taurus.
Source: Hua.com.