1976 What is the constellation of the dragon's birthday in April?

If it refers to April of Gregorian calendar, (03/2 1-04/20) is Aries, and April 21-April 30 belongs to Taurus;

However, it should mean 1976 lunar April. Upon verification, 1976 belongs to Taurus from April to 22nd, and to Gemini after April 23rd.