Home » General Knowledge MCQS » When World Down Syndrome Day Is Celebrated?When World Down Syndrome Day Is Celebrated? by A. February 21 B. March 21 C. April 21 D. May 21 Related Posts:Which is the number one game in the World?Pakistan won the Cricket T20 World Cup in________?The world’s first ATM machine located in ___________?Who is the world’s longest reigning living monarch?