What are the notes happy birthday?

This is the more typical version, in the key of F:

C C D C F E,

C C D C G F,

C C C(up octave) (Descending) A F E D

Bb Bb A F G F

Of course, the sheet music would make a lot more sense since it includes rhythm and where it is supposed to be played on the keyboard.

Also, though "Happy Birthday" is actually copyrighted, Warner Brothers has made no attempts to restrict publication (because it is so popular) you can google "Happy birthday sheet music free" and find many results with variations of the song.