I don't do anything specific for april 1st. I'm a boring person. [:
I do, however, like to mess up the computer's settings (the one everyone uses [I have a laptop that only I use]), then watch my family's confusion when they can't get it to work properly. Then it's a pain when they make me fix it, though, because they don't know how. I seriously was called into another room to show my mother where the refresh button is a while ago. I:
Not on a specific day, though.