WEIRD HOLIDAYS

It's all fun and games until someone tumbles out of a window.

8 Pillow Fights That Caused Serious Trouble

Pillow fights can lead to some serious trouble. Don’t believe us? Here are some examples of times pillow fights took a turn for the worse.

April Fools' Day can have unintended consequences.

10 April Fools' Pranks That Went Horribly Awry

Everyone loves a good April Fools' prank—unless it results in armed law enforcement surrounding your home.

10 Timely Facts About Leap Years

We’ve been adding an extra day to February since Julius Caesar overhauled the Roman calendar and implemented leap years in 46 BCE.

18 Weird and Wonderful Holidays to Celebrate in the New Year

In this edition of "The List Show," Mental Floss Editor-in-Chief Erin McCarthy is traveling the world to celebrate more than a dozen bizarre holidays you probably didn't know existed.

13 Facts About the Tooth Fairy

In the United States, children who leave a newly lost tooth under their pillow know to expect a nocturnal visit from the Tooth Fairy, who might leave a shiny quarter, a new toothbrush, or perhaps even a crisp $20 bill!

Coolhaus Is Serving French’s Mustard Ice Cream This Week In Honor of National Mustard Day

Here’s to hoping that the bright yellow, tangy dessert joins the ranks of other bizarre food mashups like pineapple on pizza and fries in milkshakes.

If March 15 Is the Ides of March, What Does That Make March 16?

The Romans referred to the days of the month by their relation to the 'Kalends,' the 'Ides,' and the 'Nones.' If Caesar had been killed any other day, his famous warning might have sounded much less ominous.