Let’s get away from playing merry Christmas it’s not even in the bible.
“These are the Feast of the Lord, even holy convocations, which ye shall proclaim in their seasons” (Leviticus 23:4)
Passover, Feast of Unleavened Bread, Feast of First Fruits, Day of Pentecost, Feast of Trumpets, Day of Atonement, Feast of Tabernacles. These are the 7 feast days that true worshipers of Jesus celebrate. I don’t see merry Christmas nowhere in them. Then why do you celebrate something that Jesus himself didn’t celebrate?
Actually he told you don’t worship in this manner at all; because it is a celebration of PAGAN Festivals.