1. A: When is your birthday, Tina?

 B: It's on November 30th.

2. A: When is your birthday, Sam?

 B: It's on October 3rd.

3. A: When is your birthday, Liu Mei?

 B: It's on June 5th.

4. A: When is your birthday, John?

 B: It's on August 2nd.