朋友们祝你们开心用英语怎么说?

I wish you a happy friends

Wish you happy,my dear friends.
绝对正确.

口语化的：Have a good time, you guys.
书面的：I wish you happy, my friends.

Enjoy it!
Have a good time!
口语一般就是这样

enjoy yourselves
have a good time/nice day

Wish you happy, my friends!