"希望你有愉快的一天"用英语怎么说

Hope you can have a nice day.

May you a happy day!(May 的一种习惯用法，经常用的）
Wish you a happy day!（注意：wish 和hope 的区别，详细的可以看一下字典）
I hope you will have a happy day!
Have a nice day!(这种简洁）

Wish you a pleasant day!
或I hope you will have a pleasantday!

Hope that you have a great day!

I hope you'll have a happy day.

Have a nice day!