Constellations are determined by the date of the solar calendar. 1978 Lunar February 19 Gregorian calendar date is March 27th, and the constellation of that day is Aries.
Lunar calendar: February 19, 78.
Main branch: Wuwu Maoyi Wuzi
Gregorian calendar:1Monday, March 27th, 978 Aries.
Source: Hua.com.