Who wrote the happy birthday to you tune?
No context provided
Who is believed to have written the happy birthday tune?
Patty and Mildred J. Hill
No context provided
Who was credited with writing the happy birthday tune on the copywright?
Preston Ware Orem and Mrs. R. R. Forman
Happy Birthday
https://en.wikipedia.org/wiki/Happy%20Birthday
"Happy Birthday to You", also known as "Happy Birthday", is a song traditionally sung to celebrate a person's birthday. According to the 1998 Guinness World Records, it is the most recognized song in the English language, followed by "For He's a Jolly Good Fellow". 
Happy Birthday to You
"Happy Birthday to You", also known as "Happy Birthday", is a song traditionally sung to celebrate a person's birthday. According to the 1998 Guinness World Records, it is the most recognized song in the English language, followed by "For He's a Jolly Good Fellow". It is believed that Patty and Mildred J. Hill had written the Happy Birthday song. However, Preston Ware Orem and Mrs. R. R. Forman were credited for it. 