CULTURAS IN VITRO
Exposing the Happy Birthday story:
1 - What is that song Good Morning to All, and how does it relate to Happy Birthday to You?
2 - Is the melody to Happy Birthday to You public domain?
3 - Are the lyrics to Happy Birthday to You also public domain? [...]
Good Morning to All is public domain and free to use, even for commercial use. The Happy Birthday to You melody is probably the same as the Good Morning to All melody in a legal sense. Happy Birthday to You (with the lyrics) might be public domain.