Stephen Nichols What is Reformation Day? To answer that question, let’s ask another question. When is Reformation Day? It’s October 31; it commemorates the events of October 31, 1517. On that day, Martin Luther, an Augustinian monk, nailed his Ninety-Five Theses to the church door in Wittenberg, Germany. Now, why would Luther do that? To answer this question, we need to introduce a few more characters...