I don't celebrate. But not because I think dressing up is bad or getting candy is bad. I think the celebration of the dead and evil witchcraft I think that is evil. Now to say it's pagan I don't think so. I think some good Christian resources on this would be Inspiring Philosophy and pastor Mike Winger on YouTube. But Romans 14 is a good place to start for Christians if they decide to celebrate or not and the scriptures as a whole should be what guides you. Peace and grace to you