I wanna know when these folk are going to get all hot 'n bothered by the dozens of Christmas songs that have been around for decades...and which aren't Christmas songs:
"Happy Holidays" (Andy Williams)
"Winter Wonderland"
"Sleigh Ride"
"Frosty the Snowman"
"Jingle Bell Rock"
etc., etc.
Let me add my favorite:
Deck the Halls
What in the heck do boughs of holly have to do with the birth of Jesus? Nothing, of course, because the song is all about the Yule, i.e. the passing of the year.
In fact, this is a little more clear if you look at the other verses
Deck the halls with boughs of holly
'Tis the season to be jolly
Don we now our gay apparel
Troll the ancient Yule-tide carol
See the blazing Yule before us.
Strike the harp and join the chorus.
Follow me in merry measure.
While I tell of Yule-tide treasure.
Fast away the old year passes.
Hail the new year, lads and lasses
Sing we joyous, all together.
heedless of the wind and weather.
Wikipedia, however, claims that any song about Christmas or "the winter season in general" is a "Christmas Carol."
http://en.wikipedia.org/wiki/Christmas_carol
However, it does call "Deck the Halls" a "secular Christmas Carol."
So sing Deck the Halls, contribute to the secularization of Christmas!