You can learn more about Reformation Day here, here and/or here.
Out of love and concern for truth, here is the complete list of Martin Luther's 95 Theses.
Here are some previous posts of mine pointing out resources for you to use with your children to learn more about Martin Luther and the Reformation:
- Inside the Reformation
- History Lives Series (in general): Courage and Conviction
- Martin Luther: A Man Who Changed the World (and other picture books)
If the name Martin Luther isn't familiar to you, I imagine that this famous song (written by him) is (sung by one of my favorite singers.):
May we not forget where we came from so that we won't forget where we're going.