Harry, Ron and Hermione deside to make Marauder's day a thing to honor the Marauders. (except for wormtail of course) Hermione is a bit skepital at first but decides it will be nice to honor them. Little did she know how extreme Harry and Ron planned their pranks (with the help of Fred and Geoge) They then get into a bit of trouble but suddenly pranks on Marauder's Day becomes a wizarding tradition.