Dating events which are **asserted** to have actually happened back then involves counting forward and/or backward, based on SWAGs* from a set of known dates and cross-comparing best guesses with the SWAGs of others. Then dates must be translated from different languages and counting systems. In all these things we have to be careful what assumptions we introduce as supposed facts. When religious claims are mixed with historical dates, a few years variation is common. And when claims about artifacts & specific locations connected with religious claims are added in, 'scholars bicker'. All this might seem like nit-picking the obvious, but supposed 'studies' of these things are often as political & biased as you might guess. *sophisticated wild-ass guesses
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