What is the scale for happy birthday?

Answer 1

The "Happy Birthday" song is typically sung in a major key, often in C major or G major, and follows a simple melody that consists of four phrases. The scale used in the song is based on the major scale, which includes the notes of the chosen key. For example, in C major, the notes are C, D, E, F, G, A, and B. The melody is designed to be uplifting and celebratory, fitting the occasion of a birthday.