Uhu, of course, three millennia ago was the same system of counting (sounded as "minus such a year from the arrival of the unknown saint of the non-existent yet religion". And most importantly, sitting in the suitcase, you instantly learn about the event and start counting times "in a new style"!
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Archaeologists have found an ancient Greek coin of the early period, on which the date - "300 B.C." was stamped.