This alleged holiday is the Irish Cinco de Mayo.
That wasn't the joke. Nothing funny about 'drink 'till you're smart' day. Anyhow:
Q. What did St. Patrick say as he was driving the snakes out of Ireland?
A. "you guys comfortable back there? would you like me to roll down the window?"
That is a genuine Irish joke, told to me by an Irish ironworker named John. There was a whole pack of them on that one job, and they all thought my name was Colleen. I came this close to starting an international incident when John told me that's what they called all the girls. Oh. OK. So I can call you all "Paddy," then?
We came up with new names for each other. They called me "Kitten." I didn't mind.