YOU SAID:

i am having a very good day eating a potato

INTO JAPANESE

私はジャガイモを食べるとても良い一日を過ごしています

BACK INTO ENGLISH

I have a very good day to eat potatoes

INTO JAPANESE

私はジャガイモを食べる良い一日を

BACK INTO ENGLISH

I have a nice day to eat potatoes

INTO JAPANESE

私はジャガイモを食べる良い一日を持っている

BACK INTO ENGLISH

I have a nice day to eat potatoes