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Chinese 101: How to say “Happy birthday” in ChineseGrammar: 从 as "from" (Time or Event)
Language Tips：Understanding“大人”and “小人”in Chinese culture
Song: 王力宏《大城小爱》Big city, small love by Leehom Wong
Dialogue:
A：祝你十八岁生日快乐！
Zhù nǐ shí bā suì shēng rì kuài lè ！
Happy 18th birthday to you!
B：谢谢！从今天起，我就是个大人了。
Xiè xiè ！cóng jīn tiān qǐ ，wǒ jiù shì gè dà rén le 。
Thanks ! From today, I’m an adult now.
Words & expressions:
【祝】zhù：wish, congratulate
【岁】suì: age
【生日】shēng rì: birthday
【快乐】kuài lè: happy
【今天】jīn tiān: today
【大人】dà rén: adult