The Watchtower Society describes the year 539 BC variously as being an "Absolute Date", a "Pivotal Date"; and certainly one on which the chronology of the entire "Hebrews Scriptures" depends upon. (Some JW apologists have even described that year as being a "drop dead" date).
However, this date of 539 BC didn't just fall out of the sky and mysteriously land on our lap:
- Nowhere in the Bible will you find the fall of Babylon to Cyrus of Persia stated as happening in 539 BC - an impossibility, given that our Gregorian Calendar was not introduced until some several thousand years after the event. (The Bible uses regnal dating to catalogue events of that era; i.e. whatever king was ruling at that time, and which year of his rule the event occurred in).
Rather, this date has been determined by secular history, by using:
- The record of Claudius Ptolomey (a scholar, astronomer, geographer, historian and chronologist), who lived from 70 - 161 AD
- The works of a Babylonian scribe named Berossus (as quoted by later historians of the Roman era).
- Other early historians such as Diodorus, Africanus and Eusebius (who used Olymiadic dating to place events).
- Archaeolgy; in the form of cunieform texts, usually written on clay tablets. These writings include such things as royal inscriptions; business, administrative and legal documents; astronomical diaries; lunar eclipses (in particular, a regular series of lunar eclipses that Babylonian astronomers discovered, and recorded on what are known as the "Saros texts").
That 539 BC can be accurately fixed on the Gregorian Calendar is due soley to the remarkable knowledge that Babylonian astronomers did have about this science:
- that, and the fact that they diligently recorded their astronomical observations. Further, their observations were always dated - using the regnal day, month and year of the current Babylonian King.
By drawing on this data, modern astronomers can accurately date a giveen astronomical event on the Gregorian Calendar. Then, from this, the beginning of each Neo-Babylonian King's reign can be determined.
An excellent essay on these details can be found on the website http://corior.blogspot.com/2006/02/part-6-appendix-b-pivotal-date-539-bc.html
One will note while reading this essay that the WTS is completely dependent on both this data - and/or its associated research methods - in order to date the fall of Babylon. Yet, one will also notice their considerable ambivalence toward this same data, plus its research methods.
(My apologies to those here who are already aware of this site - there are others (myself included) who are new to this discussion board, and may not have previously known of its existence.)
Bill.