Some heathens among you probably think it's Halloween. Pagans! The godly among you surely realize that it is in fact Reformation Day, the anniversary of Martin Luther nailing his 95 Theses to the church door in Wittenburg, Germany, thus thwarting his editor's demands that he drop theses 46, 72, 87, and 91-95.
Oh, and apparently, it had some other effects, too.
I'm beginning to wonder what we ever did without Wikipedia.