The other night I went to Wal Mart to pick up some beer, and naturally I was carded. My birthday is December 20th.

So I hand the lady my ID and she says, "Hey, you were born on the same day as my daughter."

I'm like, "Really? That's cool... though I assume she's a lot younger than me."

"She was born on December 21st," she says.

So I'm thinking, Okay, then why the hell did you say we were born on the same day, you idiot?

There's not really a punch line, other than that lady doesn't understand the 20th and the 21st aren't the same day.