The Roman calendar was just a lunar month times ten until being fixed to a solar year around like 500 BC

I don't know if there are retroactive fixes to what years were which and if that coincides with the Bible or universal acceptance of their solar calendar

Let me know

> Roman calendar was just a lunar month times ten

Plus the winter, which was unassigned until it eventually became January and February. I don't see anything about it counting the entire year as anything other than a solar year.