YOU SAID:
こんにちは、いに、日は
INTO JAPANESE
こんにちは、いに、日は
BACK INTO ENGLISH
Hello, I am, day
INTO JAPANESE
こんにちは、私は、日です
BACK INTO ENGLISH
Hello, I, is the day
INTO JAPANESE
こんにちは、私はその日です
BACK INTO ENGLISH
Hello, I am that day
INTO JAPANESE
こんにちは、私はその日です
BACK INTO ENGLISH
Hello, I am that day
That didn't even make that much sense in English.