今天几号？

What's the date today?

今天几号？ 今天九月九日。

What date is today? It's September ninth.

嘿，汤姆，今天几号？

Bob: Hey, Tom, what is the date today?

今天几号了？

A: What's the date today?

今天几号?五月六号。你跟我们一起去吗?。

What's the date today? It's May 6. Can you join us?

顺便问一下，你可以告诉我今天几号，星期几吗？

By the way, can you tell me what date it is today and what day it is, please?