YOU SAID:
tanjou bi made yon bi .
INTO JAPANESE
たんじょうびでよんびん。
BACK INTO ENGLISH
Birthday birthday.
INTO JAPANESE
誕生日です。
BACK INTO ENGLISH
It's my birthday.
INTO JAPANESE
俺の誕生日だ
BACK INTO ENGLISH
It's my birthday.
That didn't even make that much sense in English.