I would say have a nice day, but maybe not.

What about the way they say, Have a nice day.

On the first nice day I went down to the court.

The two of us spent a very nice day together while you were in Florida.

As they say in my country, have a nice day.

Here, I could even walk to the store on a nice day.

It was going to be a nice day, after all.

I think it actually does end up by saying have a nice day.

This really is not going to be a nice day.

She said that was a nice day they've all gone out.