have a nice day的中文意思是过得愉快。

例句：

1.Have a nice day! 

祝您一天愉快！

2.Oh and for the record I'd rather a waiter say, “Have a nice day” and not mean it, than ignore me and mean it. 

对了，我宁愿服务生违心地对我说“祝你今天过得愉快”，而不是打从心底地忽视我

3.All right, it's time say goodbye to you. Thank you for your listening this time, have a nice day, see you next time. 

好了，又要和大家暂时在空中分别了，祝您有个愉快的一天，感谢您的这次收听，下次再会。

4.Hi! Did you have a nice day today? 

你好！你今天过得愉快吗？