圣诞节快乐的英语是Merry Christmas。
1、例句：With best wishes for a merry Christmas and a happy new year!
翻译：恭祝圣诞，并贺新禧！
2、例句：Wish you and your mother he a merry Christmas and a happy new year.
翻译：祝你和你的母亲有一个愉快的圣诞节及新年快乐。
3、例句：They sang and danced merrily and had a merry Christmas.
翻译：他们欢快地唱歌跳舞，度过了一个欢乐的圣诞节。
4、例句：I wish my dear family, friends and fellow students, partners Christmas Eve, Merry Christmas!
翻译：祝愿我亲爱的家人、朋友们、同学们、合作伙伴们平安夜、圣诞节快乐！
merry是形容词，意思是快乐的，愉快的，嬉戏作乐的。
1、例句：A merry heart has a continual feast.
翻译：一颗愉快的心会享受到接连不断的节日。
2、例句：Merry is he that has nought to lose.
翻译：人无所失，不亦乐乎。
3、例句：It is good to be merry at meal.
翻译：席间心情愉快是为上策。
christmas是名词，意思是圣诞节。
1、例句：Christmas was approaching.
翻译：圣诞节快到了。
2、例句：Christmas is an important feast for Christians.
翻译：圣诞节是基督徒的重要节日。
3、例句：Will you be at home over Christmas?
翻译：你圣诞节期间在家吗?