From Longman Dictionary of Contemporary EnglishChristmassyChrist‧mas‧sy /ˈkrɪsməsi/ adjective NICEtypical of Christmas It looked very Christmassy with lights on the trees.
Examples from the Corpus
Christmassy• a nice Christmassy atmosphere• We whipped up Christmassy feelings and pulled decorations and paper hats out of a hamper given by soldiers in the Outer Hebrides.• Glue a Christmassy shape or picture to the front of the hat.• I'd really like that, I would - I really like Christmassy things. 