Constellations are determined by the date of the solar calendar. 1February 28th, 974, the Gregorian calendar date is March 2nd1,and the constellation of that day is Aries.
Lunar calendar: February 28th, Jiayin year.
Branch: Jiayin Dingmao Xinyou
Gregorian calendar:1March 2, 9741Thursday Aries
Source: Hua.com.