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 46.87 % from 29 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 45.78 % from 41 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 43.39 % from 39 votes. More jokes about: April fools, time
Change the coffee in the office coffee maker to decaf.
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has 37.97 % from 35 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 25.16 % from 106 votes. More jokes about: April fools, christian