The Hill Sisters' students enjoyed their teachers' version of "Good Morning To All" so much that they began spontaneously singing it for birthday parties, changing the lyrics to "Happy Birthday". In 1924, Robert Coleman included "Good Morning to All" in a songbook with the birthday lyrics as a second verse. Coleman also published "Happy Birthday" in The American Hymnal in 1933. Children's Praise and Worship, edited by Andrew Byers, Bessie L. Byrum and Anna E. Koglin, published the song in 1918.
So, thanks to the Hill Sisters for giving us something to sing about.