What do you know about U.S. Presidents’ Day?

It's Washington's Birthday, not Presidents' dayImage credit: bill_washington by David Guo on Flickr (modified). CC by 2.0.

Today is Presidents’ Day. A couple of weeks ago, I noticed this entry on my calendar, I realized I really don’t remember much about why this is a day I can’t get mail or go to into a bank. As I started looking into it, I found what I thought I knew was wrong.

So you’ll be a better Jeopardy contestant, I’ll share with you what I learned:

What misconceptions did you have about this holiday?