I hope you noticed the previous explanation had some shortcomings?
Here is the same material reconsidered, from another viewpoint, you may of course make up your own mind Acts 17 v 11 again.
O.K. Take the days as years as in Numbers 14 v 34 and if the two counts end together [note Daniel 12 v 11 & 12 only gives one ending description] .
Then there is a 45 year [1335-
Return to Daniel 11 v 30-
Reconsider does 31b imply final fixing in place?
If so reconsider Revelation 17 v 18 & 18 v 7b the 680/681 does not quite do it, does it?
16200 days is not quite 45 years, it comes to around 44 years + 129 days or 4 months.
Are there two events in history which set things up to Revelation’s description near 44 years 4 months apart?
I found two commissioning candidates but I regret, not any exact [to the day] dates.
#In Istanbul ##in Paris. [That is actual local records, I think this data will exist]
About 710/711 ce and [44 years 4 months] 754/755/756 ce respectively. If these two events are proved some other distance apart than 16200 days THEN one or both date points are incorrectly selected or this method is wrong!
And we will wait on God. Do not serve God with a date in view, such is a poor motive.
Meantime discuss. Perhaps even left with two unclear solutions, maybe we are in the right ball park as they say???
In reality things seldom happen at a single point in time but happen over a short period of minor contributing factors, one must search for the point that changes or commissions the change.
So I will suggest;
The day Justinian II kissed the feet of Pope Constantine.
The day Pope Stephen really became a monarch.