The two programmes in a nutshell
The heavenly (mystery) programme and the earthly (prophecy) programme.
When they were instigated:
Genesis 1:1 (KJV) In the beginning God created the heaven and the earth.
When they will finish:
Ephesians 1:10 (KJV) That in the dispensation of the fulness of times he might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in him: