YOU SAID:

January is the first time you come back in the morning

INTO JAPANESE

1月は初めて朝に戻ってきます

BACK INTO ENGLISH

January is the first time I'm back in the morning.

INTO JAPANESE

1月は初めて朝に帰ってきました。

BACK INTO ENGLISH

I came back in the morning for the first time in January.

INTO JAPANESE

1月に初めて朝帰ってきた。

BACK INTO ENGLISH

I came back in the morning for the first time in January.