First sentence  painfully misguided   A week is a time unit equal to seven days used by the Jews at least since the time of Abraham who probably lived between  BCE and  BCE  OK let us count the ways this makes no sense   used by the Jews at least since the time of Abraham  since Abraham is the earliest figure in the Old Testament whom one might reasonably call a Jew the at least makes no sense   Abraham to the best of my knowledge is not recorded in Genesis as using a calendar of any sort The citation attached this statement refers to Moses an entirely different figure   Abraham is a legendary figure who may or may not have existed and who is only referred to in the books of the bible written hundreds or thousands of years after his supposed death  I dont want to start a fight on religion but his historicity is certainly up for debate and a citation of a yearold encyclopedia from a religious institution based in part the Abraham narrative isnt really a reliable source  Surely the ancient Jewish use of the sevenday week ought to be mentioned in the lede as it is the ultimate origin of the Wests sevenday week but the first sentence as currently written is nonsense  Any suggestions on rewrites