A day that comes once every month to two months where Joey, an administrator at Hocus*Pocus, pulls a mass-scale prank, which usually involves spam-mailing people.

As of writing this definiton, only 2 Prank Days have occured:

Prank Day 2003- Mass emailing of McDonalds
Prank Day 2004- Mass emailing of Microsoft under name of President

You know the thing about prank day is, when it doesn't go according to plan... everyone loses their minds!