Xmas or Christmas in domain? [on hold]

As we know X'mas = Christmas, but which one should we use in a domain? (i.e. ChristmasEve.com or XmasEve.com), since xmas is shorter, but when people communicates they'll more usually say Christmas instead of Xmas, and people will more likely to try Christmas when they're typing URLs.

So should we ask short domain and use Xmas in the domain, or we should just use Christmas in the domain?