678 ?.?.?.

?? ?? ??? ???? ??? — ?????? ????? ??? ?? ?1 ???? ??? ???? ?? ?????? ???? ????? ??????? ??? ??? ??? ???? ?????? ????? ?????? ???? ??? ??????? ?????? ????? ??? ≪??? ?????≫ ?????? ??????? ?????

1 January 678 - 31 August 678 ?.?.?. = 670 ?.?.
1 September 678 - 31 December 678 ?.?.?. = 671 ?.?.