Other Protestant Christians also celebrate All Hallows' Eve as Reformation Day, a day to remember the Protestant Reformation, alongside All Hallow's Eve or independently from it. This is because Martin Luther is said to have nailed his "Ninety-five Theses" to All Saints' Church in Wittenberg on All Hallows' Eve. Often, "Harvest Festivals" or "Reformation Festivals" are held on All Hallows' Eve, in which children dress up as Bible characters or Reformers. In addition to distributing candy to children who are trick-or-treating on Hallowe'en, many Christians also provide gospel tracts to them. One organization, the American Tract Society, stated that around 3 million gospel tracts are ordered from them alone for Hallowe'en celebrations. Others order Halloween-themed "Scripture Candy" to pass out to children on this day.