As a Jewish atheist, I think Christmas is one of the best things about Christianity. But in these latter days I am often alone on that day, so I have put together a reading list for it:

James Agee, "Lines Suggested by a Tennessee Song", in _The Collected
Poems_, pp. 71-75
W. H. Auden, "For the Time Being", in _Collected Poems_, pp. 269-308.
John Betjeman, "Christmas", in _Collected Poems_, pp. 153-154
Rudyard Kipling, "Christmas in India", "Eddi's Service", in _Verse:
Definitive Edition_, pp. 53-55, 512-513
Matthew 1-2; Luke 2
David McReynolds, "The Bowery: A Ghetto without a Constituency", in
_We Have Been Invaded by the 21st Century_, pp. 38-43
Edna St. Vincent Millay, "The Ballad of the Harp-Weaver", in
_Collected Poems_, pp. 177-184
Ogden Nash, "I Remember Yule"
George Orwell, "As I Please", in _The Collected Essays, Journalism and
Letters_, Vol. 4, pp. 256-259
Jean Ritchie, "Brightest and Best...The Ritchies Take Christmas", in
_Singing Family of the Cumberlands_, Chapter 10, pp. 146-178

For this company, I recommend the last. If there is such a thing as a Mudcat Christmas party, it could do worse than to take turns reading that, singing the songs as they come up.