It turned out later that there were also songs from earlier years with similar words, such as «Happy Greetings to All» and «A Happy New Year to You All». However, the kindergarten
pupils loved the Hill sisters' version, sang «Good Morning to All» and changed the lyrics spontaneously on birthdays only, when they sang «Happy Birthday to You».
Later on, a music publisher protected the
Happy Birthday version by copyright and prohibited all public singing of the song on TV, in films, on the radio, in public buildings and even in large groups unless they paid a fee.