YOU SAID:
it is a nice hot summer day
INTO JAPANESE
夏の暑い日はいい
BACK INTO ENGLISH
It was the hottest day of the summer
INTO JAPANESE
夏の暑い日だった
BACK INTO ENGLISH
It was a hot summer day
INTO JAPANESE
暑い夏の日だった
BACK INTO ENGLISH
It was a hot summer day
That didn't even make that much sense in English.