[Réquiem]

Jewish timeframe

The 70 years can be viewed within the concept of a Jewish timeframe. Zechariah 1:12, Zechariah 7:4-5, 2 Chronicles 36:20-23 and Daniel 9:2 all refer to 70 year periods.

Daniel 9:2 "In the first year of his reigning I myself, Daniel, discerned by the books the number of the years concerning which the word of Jehovah had occurred to Jeremiah the prophet, for fulfilling the devastations of Jerusalem, [namely,] seventy years."
Daniel may be indicating the period from the first destruction of Jerusalem in 601 B.C.

In the New World Translation, Jeremiah 29:10 refers to Israelites spending 70 years at Babylon. Reading from verse 1 indicates this includes the time period when the Israelites were taken to Babylon prior to the destruction of Jerusalem. Historians conclude this occurred in the year 605 B.C. when Daniel and his companions were taken.

Alternately, 70 years was the length of time the temple was in a state of disrepair, from the start of the siege on Jerusalem in 589 B.C. to the completion of the new temple in 519 B.C.

Whatever the case these, none of these periods point to 607 B.C. and yet Bible prophecy can continue to hold true, whilst accepting well supported secular history. Considering Daniel 4 is not an end time prophecy, there is no relevance to the precise start and end dates of the 70 years.