여러분 성탄절 잘 보내고 새 해 복 많이 받으세요!
Yeorobun Seontanjeol jal bonaego sae hae bok manhi paduseyo!
Merry Christmas and Happy New Year everyone!
This is how you greet this holiday in Korean. Though it literally means spend the Christmas well and happy new year everyone. One can also write Merry Christmas in Hangul that is 메리 크리스마스.