YOU SAID:

It was early in the morning when he rode into the town

INTO JAPANESE

彼が町に乗り込んだのは早朝だった

BACK INTO ENGLISH

It was early in the morning when he got into town.

INTO JAPANESE

彼が町に入ったのは朝早かった。

BACK INTO ENGLISH

It was early in the morning that he entered town.

INTO JAPANESE

彼が町に入ったのは朝早かった。

BACK INTO ENGLISH

It was early in the morning that he entered town.