Monday Links: Jimmy Fallon Loves Presidents' Day

* Jimmy Fallon wrote a song for everyone who has the day off.

* Funny or Die honors all our black presidents.

* Mother Jones' Presidents' Day playlist rules.

* These people are like our step-presidents.

* Why should anyone care about Presidents' Day?

* A profile of George Washington's presidential reluctance.

* The Complete Guide to Everything podcast discusses meteors.

* Dictators need to learn they can't rule Photoshop with an iron fist.

* Ian Frazier shines some light on the mystery of Richard III's bones.

Tags: Barack Obama, Dictators, Funny or Die, George Washington, Jimmy Fallon, Meteor, NASA, Photoshop, President's Day, Space