“Have you finished your Christmas shopping?”
“We’ll be closed on Christmas day,”
Ugly Christmas sweater
“I can’t believe you’re flying on Christmas!”
“What did you get for Christmas?”
"My birthday falls on Christmas,"
“I love Christmas.”
“Merry Christmas!” (substitute “Happy Holidays” instead, as they might not celebrate Christmas and they would be very offended).
(“Merry Ostensible Villain”)