Happy Birthday to You

Happy Birthday to You is a traditional Earth song performed at birthdays.

In 2370, the crew of the USS Enterprise (NCC-1701-D) performed Happy Birthday to You for William Riker. (SS TNG (A Q to Swear By))

After suffering a coma after a Lethean attack, Julian Bashir was treated to a perfomance by a representation of Elim Garak in his mind.