Which is less religious: Xmas or Christmas? - eviltoast

Don’t want to endorse Christianity necessarily but hard to get around saying the word Christmas or Xmas, so is Xmas more rebellious? Is there an even more rebellious or irreverent name for it?

Also, should I not even celebrate Christmas? What’s an alternative that features the presents-giving at the same time of year but in a way that isn’t tied in any way to religion (and ideally doesn’t involve killing turkeys)?