Random latin learning tip: The relative pronoun qui quae quod fits the tune of Happy birthday perfectly

Happy birthday to you
Qui quae quod cuius cui

Happy birthday to you
Quem quam quod quo qua quo

Happy birthday happy birthday
Qui quae quae quorum quarum quorum

Happy birthday to you
Quibus quos quas quae quibus

This has saved my ass so many times. Be prepared to sing it at every party and have it stuck in your head forever :)