The (1) time, (2) army of Heaven, (3) the war, (4) the nations gathered to fight ... is a collection of verses, and a theology (primarily Dispensationalism, which some absolutely hate ... :-) ...) requiring one to gather them together in one spot. It’s not easy, but I can do it ... however not tonight ... :-) ...
This really does represent a lifetime of study. But ... it’s also not a “private teaching” unknown to anyone else; it is taught and explained by other Biblical teachers, and as I say, primarily from a Dispensational understanding.
I might as well start a college theology course in doing that ... :-) ...
Well, really I am just interested in where you get the 30 days figure from, or a war against anyone besides those who are with the antichrist and his army.