I've been given a lot of grief over the years by people I know about why I choose not to celebrate the holiday known as Halloween. When I was a child I did, I didn't know anything different. But after receiving a relationship with the Lord Jesus Christ it's not on my heart to celebrate what is basically a pagan holiday. Rather than go into the history of Halloween and it's pagan roots, I'll simply allow the below Bible verses to enlighten you as to why I don't celebrate it and why I don't think that anyone proclaiming the name of Christ as a Christian should have any part in this holiday.
2 Corinthians 6:14-17
14 Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
15 And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?
16 And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.
17 Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you.
If you are interested in the origins of Halloween here are some links to go to: