In my studies, I have concluded that year 530 BC was when the destruction of Jerusalem occurred and the Temple destroyed.
I had determined this prior to investigation of VAT4956. I had already found that the Jubilees, Sabbaticals, Courses of the Priests, and chronology attested to this. Therefore, I went directly to what I had as the 37th year of Nebuchadnezzar in my studies which was 512 BC. In my astronomy program however, it doesn't have a year zero, so I researched year 511 BC. And seen enough to know that it was a match to the Tablet VAT4956. I've never been a Jehovah Witness but heard they may be interested in this subject.
But I want to take you a bit further because I also study Jubilees. 530 - 70 (years of captivity) = 460 BC. That year was a Jubilee year. Now Daniel gives you 70 weeks of 7 years in his prophecy which is 490 years. Those 490 years = 10 Jubilees exactly. Count from 460 BC and you will see that 460 - 490 = 30 AD. But there is no year 0. This means that Jesus was crucified and resurrected in 31 AD and later that year was heralded a Jubilee. That was the fulfillment year of Daniels 70 weeks. But let's go even further. Why 31 AD? Because the 2nd Temple was destroyed in 70 AD. And the Crucifixion was the beginning of that destruction when the Veil was rent. The Jews didn't really use year 0 much on their chronologies. Therefore, 40 years would be from 31 AD (inclusive) to 70 AD (inclusive). This was a type. Because there is FAR more than what you see there that is showing you the 2nd Coming. Understand that there are only 120 Jubilees given to the dominion of man. So if the 70 weeks started with a Jubilee year (460 BC) then that means they ended going into a Jubilee year (31 AD). Now given that there are 120 Jubilees, you may be wondering what was the number of that Jubilee year? - Just look to Moses. How old was Moses when he began to lead the congregation of Israel? - 80 years old. Now he died at 120 years old not able to cross in the Promised land. This was all a type. This means that Jesus began leading His Congregation in the 80th Jubilee and will do so for a SPIRTUAL Generation of 40 Jubilees to the 120th Jubilee. But remember, that Moses didn't cross into the promised land. Joshua did. The promised land is a type of the time coming when our Lord comes to rule and Joshua was a type of that 2nd Coming of our Messiah. We know it will be in a year when the Jubilee will come. So if you been reading closely, you should now know when that is with just some simple math.