节日快乐用英语怎么说?

happy (某某节日)

Happy ……（节日）
Merry Christmas 圣诞是这样

Happy New Year
Merry Christmas
Happy birthday

Happy ……（节日）

Happy date!
I don't know

Wish you a happy New Year/ Birthday/ Valentine's Day/ National Day/ May Day/ Teachers' Day/ Youth's Day, etc.