Must be Christmas?

1st to arrive, by a mere 24hrs it transpired.
It came from USA; where, it seems, in large chunks thereof, the following applies:-
" Christmas is dead, long live the Holidays."
The message says:-
"May your Holidays be Merry and Bright."
Curious thing - the sender is happy to use the word Christmas online. I suspect s/he was unable to find a politically incorrect one.

A little, online, game I waste a bit of time on has a "Holiday village" C/W the right style of tree and a Santa's Grotto, with never a mention of Christmas.
We're Ahll doomed Mr. Mainwaring.