the Bible does not give a BCE date for the fall of Jerusalem ,it is calculated by men .
What the Bible does say is “ Do not put your trust in nobles nor in the son of earthling man”
It also says: "it is not given to you to understand times and seasons--" Acts 1:7, addressing the future member of the "governing body".
Even Einstein, and follow-uppers do not understand time. (see current New Scientist)