The Romans didn't even have a number zero. Obviously, they understood the concept of nothing, but it was not part of their numerical system. Zero wouldn't be "invented" until the 10th century A.D. In any case, when counting you start at one, not zero.
The B.C./A.D. counting system was introduced in the dark ages, but it would still be some time before Arabic numerals (including the zero) would make their way to Europe. As Lysimachos wrote, the dark-age scholars didn't quite get the calculation right, though, as events mentioned in the New Testament occur at dates that do not make sense if Jesus was born in the year 1.
Bookmarks