YOU SAID:
I haven't seen you in a month of sundays
INTO JAPANESE
日曜日は一ヶ月も会ってない
BACK INTO ENGLISH
I haven't seen you on Sunday for a month
INTO JAPANESE
日曜日には一ヶ月も会っていない
BACK INTO ENGLISH
I haven't seen you on Sunday for a month
You love that! Don't you?