The authentic Bible and the Quran are in actual fact very similar. Things such as people shouldn't eat swine, shouldn't tattoo their skin, love thy neighbour, women should dress modestly etc, appear in both books. So the religions are closer than people really think and there are many more similarities between the two.
On another note, people nowadays celebrate anything and everything, even when they don't really know why they are celebrating and what it's all about. People confuse Paganism with Christianity. Ask yourself why you celebrate Easter? What do bunny rabbits and eggs have to do with it? Why do people give their children Easter eggs? How do these things relate to the "death of Jesus?".. It is claimed that Jesus died and was risen on the third day, very similar to the solstice stays still rising on the third??
Halloween is the celebration of all things evil. It's the night that celebrates the dark side. It's a night where people celebrate by dressing up and partying, but what they don't know is that this is a very evil event and holds a darker deeper meaning. Why do people celebrate evil without questioning it? surly participating in such an event and getting children to do the same is wrong? Think about it...
So.... before you celebrate something? do your research first and understand what you are really celebrating.