Constellations are determined by the date of the solar calendar. 1997 The solar calendar date on the fifth day of the third lunar month is April 1 1, and the constellation of that day is Aries.
Lunar calendar: the fifth day of March in Ding Chou's year.
Stems and branches: Ding Chou Chen Jia Gui Wei
Gregorian calendar: 1997 April 1 1 Friday Aries.
Source: Hua.com.