It is good to see in these days of doubt an open and, mostly (there was the sad, sick incident of “x burning”) friendly debate on religion.
BUT!!! getting back to the OP, what exactly are Christmans? What light can x, y, z, xy, xyz, and/or og adherents shed on this strange, though multi-lettered, sect?
Only if you’re a Pinkard & Bowden fan.
Well, it is only a theory.
Then you’re more than qualified to start a religion.
It was originally spelled Christmas in the OP, but that pesky n is trying to force his cult down our throats. Silly false god!
Ahh, it’s 1920’s style death X.
Mathematicians know that X is unknown. 
But it can be equated.
“If A is a success in life, then A equals X plus Y plus Z. Work is X; Y is play; and Z is keeping your mouth shut.”
– Albert Einstein