YOU SAID:

hello it's my birthday

INTO JAPANESE

こんにちはそれは私の誕生日です

BACK INTO ENGLISH

Hello, it's my birthday

INTO JAPANESE

こんにちは、私の誕生日です

BACK INTO ENGLISH

Hello, this is my birthday

INTO JAPANESE

こんにちは、これは私の誕生日です

BACK INTO ENGLISH

Hello, this is my birthday