Doug Mason
Hi Doug
Edwin Thiele in his MNHK, 1983, p.67 states "In the Old Testament no absolute dates are given and it becomes our task to establish. if we can, some absolute date in the history of Israel that can be used as a starting point to establish other dates in the desired chronological scheme". WT scholars have selected the Fall of Babylon universally accepted in the year of 539 BCE. Such date in current WT literature is classed as a pivotal date rather than considered to be an Absolute Date but tatter term is my preferent.
Scholars seem to prefer 537BCE for the Return rather than 538 or 535 BCE and WT publications have carefully constructed the facts underlying the determination of 537 BCE.
2 Chronicles 36 in connection with the 70 years omits any reference to Babylon's Fall but only the ist year of Cyrus which is the Return of the Exiles. This means that the 70 years could not have ended in 539 but in 537 BCE. Judah alone was to serve Babylon for 70 years marked by their deportation and the desolation of the land. Other nations also were brought into servitude to Babylon
That is simply your interpretation that the 70 years has symbolic meaning but other authorities who wrote after the event stated that these years were literal a definite historical period.
The 70 years began in the same year as the Fall namely 607 BCE beginning in the seventh month of that year.
scholar