I personally believe (others are free to disagree) that we find at least a partial answer to this question in the book of Genesis, and specifically in the creation week account. There, God worked six days, and then he rested on the seventh day. Seeing how, at times, a day with the Lord is as a thousand years, I believe that God was showing us his timetable for man on this earth during the creation week. In other words. I believe that man will labor for 6000 years (6 days), and then the redeemed will rest during the seventh 1000 year period (the 7th day) or during the coming Millennial Reign of Christ. If the Hebrew calendar is correct, then it is presently the year 5785.