캘린더에 추가된 달과 그 이유는 무엇인가요?
10개월 길이의 로마력 1년을 음력과 일치시키기 위해 1월과 2월이 추가되었습니다.
Which months were added to the calendar and why?
In order for the Roman calendar year which was ten months long, to be in sync with the lunar year, the months of January and February were added.