元旦快樂既是新年快樂，happy new year。
或者可以這樣說： Happy new year's day。
新年還有其他祝福語：
1、Wishing you many future successes.
祝妳今後獲得更大成就。
2、On this special day I send you New Years greetings and hope that some day soon we shall be together.
在這特殊的日子，向妳致以新年的祝福，希望不久我們能相聚在壹起。
3、I would like to wish you a joyous new year and express my hope for your happiness and good future.
祝新年快樂，並願妳幸福吉祥，前程似錦。
4、May the New Year bring many good things and rich blessings to you and all those you love!
願新年帶給妳和妳所愛的人許多美好的事物和無盡的祝福!
5、Rich blessings for health and longevity is my special wish for you in the coming year.
祝妳在新的壹年裏身體健康，多福多壽。
6、Good luck, good health, good cheer. I wish you a happy New Year.
祝好運、健康、快樂伴妳度過壹個愉快的新年。