Happy Birthday to You
From Memory Alpha, the free Star Trek reference
Happy Birthday to You is an Earth song that is typically sung at birthday parties. Originally, Good Morning to All, "Happy Birthday" had the same cadence and replaced "good morning".
In a coma he experienced after being attacked by a Lethean, Julian Bashir was treated to a performance of the song by a representation of Elim Garak (the form taken by the Lethean, Altovar) and a dabo girl in 2371. (DS9: "Distant Voices")
