As I recall, prior to the godboy, the Roman Empire kept track of the date based on the reign/death of a significant Ceasar. Therefore, the year could easily change if the powers that be so desired to "restart" the clock with the birth/death of an important ruler. Min probably knows the specifics better than I do, but I think the actual year that Jesus was born (according to the Roman calendar of that time) was somewhere around 750 ... and that might have actually been 750 some odd years after the founding of Rome ... but I'm not totally sure and don't want to spend the time looking it up.
Most of the prominent civilizations (the Egyptians, etc) practiced this method of recording the date of the year. The truth is, you can assign any number you want to the year. 14,012 is every bit as legitimate as calling it the year 2012. It means nothing. Hell, I seem to remember that some Cardinal (or clergy of some kind) didn't even come up with the BC/AD system until 6 centuries after JC had supposedly died.
Most of the prominent civilizations (the Egyptians, etc) practiced this method of recording the date of the year. The truth is, you can assign any number you want to the year. 14,012 is every bit as legitimate as calling it the year 2012. It means nothing. Hell, I seem to remember that some Cardinal (or clergy of some kind) didn't even come up with the BC/AD system until 6 centuries after JC had supposedly died.