Well, as a Christian I choose to celebrate every day... because nobody knows when the end is coming so you should live every day as if it is your last. As for a day being satanic...horse pucky...I believe Satan only has the power you give him over you. So if you celebrate Halloween with the worship of God in your heart and on you lips It's not any more satanic than a Peanut Butter and Jelly Sandwich.
So I can do whatever I want and as long as I do it under the guise of worship it's okay? I don't buy it. Or, we can host a celebration of a bagan holiday at church and it's okay because it brings in people who wouldn't normally come into the church. Don't buy that either. Why not have strippers on Thursday nights? It'd bring in people who wouldn't normally go to church.