Ephesians 5:11 Have no fellowship with the unfruitful works of darkness, but rather reprove them. The origins of Halloween are clear, it is a Satanic pagan holiday. The Catholic church adopted it as they did with all pagan holidays on the witches calander. Lukewarm Christian churches are now participating in Trunk or Treat and Harvest Parties. Examine the true history and consider what God's word says about it.