Pretty much every day of the week is some sort of celebration that isn't Christian.
Will you stop doing anything because of this?
Just because I take part in trick-or-treating and putting up decorations doesn't mean that I am celebrating with Satanists. I don't even know any Satanists.
If you are convicted that you shouldn't celebrate Halloween or Christmas or Easter, than by all means, don't celebrate or take part. However, that conviction could very well be just for you or others that have received that same conviction, it doesn't mean that it is for all. Kinda like drinking alcohol. Some people get convicted by God because they drink as it can be a sin for them to do so, others they don't. I don't get convicted because I drink alcohol as Inwould never drink it to excess, ever. I hardly drink at all and if I do, the hardest thing that I drink is Roscato Sweet Red Wine. I have never been drunk in my life. Never saw the point in it.