According to the 1998 Guinness Book of World Records, "Happy Birthday to You" is the most recognized song in the English language. The melody of "Happy Birthday to You" comes from the song "Good Morning to All", which was written and composed by American siblings Patty Hill and Mildred J. Hill in 1893. The combination of melody and lyrics in "Happy Birthday to You" first appeared in print in 1912, and probably existed even earlier. The Summy Company registered for copyright in 1935, crediting authors Preston Ware Orem and Mrs. R.R. Forman. In 1990, Warner Chappell purchased the company owning the copyright for $15 million, with the value of "Happy Birthday" estimated at $5 million. Based on the 1935 copyright registration, Warner claims that the United States copyright will not expire until 2030, and that unauthorized public performances of the song are technically illegal unless royalties are paid to it.[...]
Here you can record you singing "Happy birthday" for collective teaching copy:
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