For most Americans, the last day of October is a time of trick-or-treating, costumes, candy, and various spooky things from horror movies to haunted houses.
Halloween, the holiday most known for its playful scaring and bags of sweets, is most closely associated by mainstream culture with Oct. 31.
However, for hundreds of churches across the United States and many others throughout global Protestantism, Oct. 31 is a time to remember the birth of the Reformation.
Known as Reformation Day, many churches hold special services either on the day itself or the nearest Sunday, which this year was Oct. 30.
Below in no particular order are five facts about the observance, history, and celebrations scheduled for next year, the 500th anniversary of the Reformation.