| # A [[date]] [[expressed]] as a [[number]], normally counted from 4713 [[BC]], used by [[astronomer]]s and [[historian]]s to [[compare]] [[event]]s [[recorded]] in different [[culture]]s. | | # A [[date]] [[expressed]] as a [[number]], normally counted from 4713 [[BC]], used by [[astronomer]]s and [[historian]]s to [[compare]] [[event]]s [[recorded]] in different [[culture]]s. |
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