Whoa, pony.
Christmas might be a religious holiday and everything, but it is as much, if not moreso, a cultural holiday, and deeply ingrained in Atlasian life.
I do not mind the fact that it is a religious holiday at all. It is, however, not a native Atlasian holiday, being Italian (Roman) in origin.
If we want religious holidays, they should be related to Atlasian religions. Heartrending Departure of PD Day for the Church of PD, something related to the establishment of their cult for the Leipian Methodists. [/tongue in cheek]
There's some humor potential here.