Patty Hill and Mildred J. Hill wrote Happy Birthday to You. It is the most recognized song in the English language & the lyrics have been translated into at least 18 languages. What were birthday parties like before the Hill sisters? What did they sing when the cake came out? Did this song end war or oppression? No but it did bring a lot of smiles and happiness to young faces, It certainly has grown in popularity and it shows no sign of disappearing.