YOU SAID:
The day has come to be you
INTO JAPANESE
その日は君になった
BACK INTO ENGLISH
I became you that day.
INTO JAPANESE
その日、私はあなたをなんだ。
BACK INTO ENGLISH
That day, I'm you.
INTO JAPANESE
その日、私はあなたです。
BACK INTO ENGLISH
That day, I am you.
INTO JAPANESE
その日、私はあなたです。
BACK INTO ENGLISH
That day, I am you.
That didn't even make that much sense in English.