And, AD ~ Anno Domini ~ or Ad Domini ~ how do you know the fellows who invented AD didn't invent AD before they invented the latin words to 'splain it?
Neither are Biblical BTW.
More commonly is to say something like 3,500 years before present, or 3,500 years ago.
Abbreviations mean what we want them to mean.
What everybody is doing who is telling you how many years they estimate have passed since a certain event took place, or what radio carbon dating, or other process might be telling you, is that it's all pretty old ~ much more than yesterday, or last week.
You should be much more concerned when the Hindus come up with BK and don't mean "Burger King" ~ and that's definitely going to happen now that they've found Dwarka!
You do realize that this is a war of culture don’t you? It looks like you’ve chosen your side.
Imagine? Even your supposed questions are insulting. BCE is Anti-theist dialect for "Before Common Era." And Anti-theism is for ignorant control freaks and wannabe emperors. Agnosticism is the only non-religion to which the intelligent ascribe.