Boss: November 15th..what else is occurring on that date?
Me: The Ides of November
Boss: Every month doesn’t have an ides
Me: Sure they do
Boss: No they don’t
Me: Yes they do
Boss: Bet?
Me: Sure.

I won a nickel.

(Though I’m lucky the bet was phrased the way it was, because the Ides of November fall on November 13th)