YOU SAID:
I AM NOT HAVING A very good day
INTO JAPANESE
私はとても良い日を過ごしていません
BACK INTO ENGLISH
I have not had a very good day
INTO JAPANESE
私はとても良い一日を過ごしたことがない
BACK INTO ENGLISH
I have never had a very good day
INTO JAPANESE
私はとても良い一日を過ごしたことがない
BACK INTO ENGLISH
I have never had a very good day
You've done this before, haven't you.