I am interested in learning more about which months Russell claimed Satan was thrown out of heaven, and the start of the war...
BTW, I understand that Josiah died in the battle of Megiddo against the Egyptians c. 607 BC (Give or take 2 years). After that battle, Judah was considered a tributary of Egypt, and no longer its own nation. I suppose if you are looking for a start of 2520 years of gentile times... it could be considered. It's the only connection I can imagine, and never brought up by any WT leader.
It all looks to me that for the WT, there is more irony involved over 1914 than inspiration.
bebu