Around the world, there are at least 360,470 born everyday. Well, we have a lot of birthday celebrations to attend to if only we could. In every celebration I attended, we usually sing "Happy birthday to you" melody to the celebrant. Tradition.
Do you know that October 13, 1893 was date when the "Happy Birthday to you" melody was copyright registered? The melody must have been an very popular in almost around the world, I bet.
The "Happy Birthday to you" or commonly known as Happy Birthday was originally published as "Good Morning To All" in a book called "Song Stories for the Kindergarten" written by sisters Mildred and Patty Hill who are both kindergarten school teachers.
With that, I'm somehow thankful with the two sisters who made those melody possible. You may also at Wikipedia regarding some issues on its copyright.
Sources: Wikipedia and About.com
Stat source : http://hypertextbook.com/facts/2004/VanessaChambers.shtml