I will say that that the Christmas Spirit ends up being one of the last remaining residues of what's actually a Catholic spirit, "in terra pax hominibus bonae voluntatis"
"Gloria in excelsis Deo, et in terra pax hominibus bonae voluntatis"
Glory to God in the highest, and on earth, peace to men of good will" My all time favourite bible verse.
I can't see the Latin quote as being a last remaining residue of the Catholic spirit for an atheist because the protestants have miss translated the verse to read "peace on earth good will toward men", which fits into their "everyone goes to heaven....we're all saved because Jesus died for our sins"
For an atheist the Christmas Spirit is nothing more than a lot of commercial hoop la.