(…) the defeat of evil and of demonic powers is associated with Halloween. For this reason, Martin Luther posted his 95 challenges to the wicked practices of the Church to the bulletin board on the door of the Wittenberg chapel on Halloween. He picked his day with care, and ever since Halloween has also been Reformation Day.
from: The American Vision
At the time, few would have suspected that the sound of a hammer striking the castle church door in Wittenberg, Germany, would soon be heard around the world and lead ultimately to the greatest transformation of Western society since the apostles first preached the Gospel throughout the Roman empire. Martin Luther’s nailing of his ninety-five theses to the church door on October 31, 1517, provoked a debate that culminated finally in what we now call the Protestant Reformation.
from: LIGONIER Ministries