Day is the one day a year when mild psychological warfare is socially acceptable. No elaborate setups, no permanent damage—just harmless pranks that will leave your friends questioning their sanity while you try (and fail) to keep a straight face.

If you find yourself the target of a prank this year, just remember to take it in stride. After all, it’s tradition!

It’s almost that time of year, that day on the calendar that sparks either immense joy or general annoyance. April Fools’ Day. The holiday, which has had varied iterations across a number of western cultures over the centuries , is solidified in the United States, and specifically, in the nation’s schools.