"The lyrics to the Birthday Round were written by Dorothy Dushkin, a composer who founded Kinhaven Music School and summer camp in Weston,VT with her husband David in 1952. The song appeared in the Kinhaven cookbook and was sung at the camp on a regular basis. This is a photo of page 106 in the cookbook with a description of birthdays at Kinhaven and the score for the song. The tune and phrasing differ somewhat from the original tune and from how it is generally sung today, especially the last three notes."


from AmherstContraDOTorg

I learned it when I was a teen because my best bud (an oboist) went to Kinhaven during the summer.