"We wish you a Merry Christmas and a Happy New Year!" Simple: "Wishing you magic, love, and joy this Christmas!"
"I'm dreaming of a white Christmas, but if the white runs out, I'll drink the red." P6T6H6C - Merry Christmas and Happy New Year 20...
The distinction between the two is rooted in tradition and connotation: "We wish you a Merry Christmas and a Happy New Year