YOU SAID:

I sat on my couch and ate some food when it was late at night

INTO JAPANESE

夜遅くなったときにソファに座って食べ物を食べた

BACK INTO ENGLISH

I sat on the couch and ate food when it was late at night

INTO JAPANESE

私はソファに座って夜遅くなったときに食べ物を食べました

BACK INTO ENGLISH

I sat on the couch and ate food when it was late

INTO JAPANESE

私はソファに座り、遅くなったときに食べ物を食べました

BACK INTO ENGLISH

I sat on the couch and ate food when I was late

INTO JAPANESE

私はソファに座り、遅刻したときに食べ物を食べました

BACK INTO ENGLISH

I sat on the couch and ate food when I was late