Merry Christmas In Spanish. Hacer un muñeco de nieve es divertido. To wish somebody a Merry Christmas use Feliz Navidad.

Best wishes for you and your family. To wish someone Merry Christmas and Happy New Year in Spanish. Que pases lindo esta Navidad.
A lot of New Year traditions welcome in prosperity for the new year so Próspero Año Nuevo is commonly used.
En navidad conmemoramos el nacimiento del niño Jesús. The word for Christmas Eve would be Nochebuena which literally means the good night. For New Years Eve you say Nochevieja. Feliz Navidad May Jesus protect you and your family this New Year.