祝你生日快乐。

Happy birthday to you!

I wish you a happy birthday.

Source: Tatoeba

Sentence Composition

=1 祝 Zhù surname Zhu
=1 祝 zhù
  1. to pray for
  2. to wish (sb bon voyage, happy birthday etc)
  3. person who invokes the spirits during sacrificial ceremonies
=1 祝 zhòu alternative form of 咒 (zhòu, “to curse”)
=2 你 nǐ you (informal, as opposed to courteous 您 nín)
=2 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
3 生日快乐 shēngrìkuàilè Happy birthday