It became the eighth month either when January and February were added to the beginning of the year by ORGANIZATION@1 about NUMBER@1 BC or when those two months were moved from the end to the beginning of the year by the decemvirs about NUMBER@2 BC -LRB- MISC@1 writers disagree -RRB- .

It was the eighth month when January or February were added to the start of the year by ORGANIZATION@1 about NUMBER@1 BC .
