A happy New Year to you.祝你新年快乐(幸福)。

A merry Christmas to you.祝你圣诞快乐(幸福)。

A merry Christmas and a happy New Year!祝圣诞快乐，新年快乐!

Have a good Christmas!

Have a happy birthday!生日快乐!

Have a happy Easter!复活节快乐!圣诞快乐!

Have a happy wedding anniversary!结婚周年快乐!

Thank you.And I wish you the same!谢谢你。同乐!同乐!

Thank you.And the same to you!谢谢你。同乐!同乐!

Thank you.You too!谢谢你。你也快乐!

Thank you.And a happy New Year to you，too!谢谢你。也祝你新年快乐!

Thank you.And a merry Christmas to you!谢谢你。祝你圣诞快乐!

All the very best!祝你万事如意!

Let me congratulate you on your…让我祝贺你……

Please accept my congratulations on…请接受我祝贺你……

The best of luck.祝你好运!

Congratulations!祝贺! Congratulations on your…祝贺你……

I hear that you… Congratulations!我听说你……向你祝贺!