When is your birthday?

你的生日在什么时候？

My birthday is in January.My birthday is in January.

我的生日在一月。我的生日在一月。

My birthday is in January.It's on January 1st.

我的生日在一月。它在一月一日。

My birthday is in August.My birthday is in August.

我的生日在八月。我的生日在八月。

My birthday is in August.It's on August 5th.

我的生日在八月。它在八月五日。