YOU SAID:
its your birthday today
INTO JAPANESE
今日のあなたの誕生日
BACK INTO ENGLISH
Today's your birthday
INTO JAPANESE
今日はあなたの誕生日です
BACK INTO ENGLISH
Today is your birthday
INTO JAPANESE
今日はあなたの誕生日です
BACK INTO ENGLISH
Today is your birthday
That didn't even make that much sense in English.