IP1 p.253 21 Isaiah goes on to prophesy: “It must occur in that day that Tyre must be forgotten seventy years, the same as the days of one king.” (Isaiah 23:15a) Following the destruction of the mainland city by the Babylonians, the island-city of Tyre will “be forgotten.” True to the prophecy, for the duration of “one king”—the Babylonian Empire—the island-city of Tyre will not be an important financial power. Jehovah, through Jeremiah, includes Tyre among the nations that will be singled out to drink the wine of His rage. He says: “These nations will have to serve the king of Babylon seventy years.” (Jeremiah 25:8-17, 22, 27) True, the island-city of Tyre is not subject to Babylon for a full 70 years, since the Babylonian Empire falls in 539 B.C.E. Evidently, the 70 years represents the period of Babylonia’s greatest domination—when the Babylonian royal dynasty boasts of having lifted its throne even above “the stars of God.” (Isaiah 14:13) Different nations come under that domination at different times. But at the end of 70 years, that domination will crumble.
8-1-81 WT “The idol-worshiping Babylonians now were in line for God’s judgment to be executed upon them. That happened in 539 B.C.E. when Babylon was overthrown by the Medes and the Persians.”
539 + 70 = 609
Jeremiah 25: 11 And all this land must become a devastated place, an object of astonishment, and these nations will have to serve the king of Babylon seventy years.”’ 12 “‘And it must occur that when seventy years have been fulfilled I shall call to account against the king of Babylon and against that nation,’ is the utterance of Jehovah, ‘their error, even against the land of the Chal·de´ans, and I will make it desolate wastes to time indefinite.
Q: When did Jehovah say he was going to call to account the king of Babylon and that nation?
A: When 70 years had been fulfilled.
Q: What year did Jehovah call to account the king of Babylon and that nation?
A: In 539 Jehovah called to account the king of Babylon and that nation by executing his judment upon them by having them overthrown by the Medes and the Persians.
Q: If Jehovah called to account Babylon in 539 because that was the time that the 70 years were fulfilled, then when did the 70 begin?
A: 539 + 70 = 609