Do You Think With That Brain?

Dense Coworker: "Today's tax day!"

Me: ?

DC: "April 14th!"

Me: "Tax day is April 15th."

DC:"It is?"

Me: "Yes. You have all of tomorrow to send in your taxes."

DC: "Really? I'm a whole day early!"

The eerie part of this conversation was that my co-worker seemed genuinely surprised. I can understand blanking and saying something silly, but I can't understand a working, tax-paying American adult who doesn't know.