The best April fools jokes

Install the Blue Screen of Death screen-saver on someone's computer.
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has 49.76 % from 56 votes. More jokes about: April fools, computer, IT
April doesn't fool Chuck Norris, Chuck Norris fools April.
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has 48.37 % from 30 votes. More jokes about: April fools, Chuck Norris
Pull on a coworker is to press ctrl+print screen on their workstation, then paste it into Paint, save the pic, and set it as the desktop background. Move all of their icons to the trash. When they get back to their desk, clicking won't accomplish anything!
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has 46.90 % from 42 votes. More jokes about: April fools, computer, office
Hide an alarm clock in someone's bedroom and set it for 3:00 a.m.
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has 44.61 % from 40 votes. More jokes about: April fools, time
Change the coffee in the office coffee maker to decaf.
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has 39.42 % from 36 votes. More jokes about: April fools, office
I just recently discovered that there is a national holiday named after Atheism. April FOOLS day. Like this story in the name of Jesus.
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has 25.78 % from 107 votes. More jokes about: April fools, christian