
I think a BIRTHDAY party is a terrible idea.
The Big Bang Theory Season 1, Episode 16

This one BIRTHDAY,
I came home from my cello lesson...
The Big Bang Theory Season 1, Episode 16

to Halley's BIRTHDAY.
That wasn't cool.
The Big Bang Theory Season 11, Episode 11

We are attending my Aunt Flora's
93rd BIRTHDAY party.
The Big Bang Theory Season 5, Episode 19

Aw, remember when they only
did it on her BIRTHDAY?
The Big Bang Theory Season 12, Episode 13