Chapter 6 of Revelation describes the opening of seven seals, signifying seven dispensations of the earth, approximately the following:  (1) Adam to Enoch; (2) after Enoch, Moses onward to the time just before Abraham, (3) Abraham, Isaac and Jacob, (4) Malachi (1,200 BC to just before Christ's birth in 6 BC, (5) time of Christ to about the Protestant Reformation and the Restoration under Joseph Smith, (6) Restoration until the Second Coming of Jesus, (7) time of the Second Coming and transformation of the world.  Chapters 7-9 describe calamities before the Second Coming.