Written circa 300 a. d., the Seder Olam Rabbah compresses biblical chronology by about 250 years (so this is the judaistic year 5777 rather than the biblical 6021 since the six days of creation) in order to make look wrong the prophecy in Daniel 9 that the Messiah would be cut-off (then resurrected), 483 years after the command by Darius to rebuild the Temple in Jerusalem. We are not quite to the close of the sixth millennium because Adam and Eve fell perhaps about 25 years after the six days of creation, consistent that a day to Elohim is as a thousand years.
