As to the end, that can not yet be predicted, as prophecy needs to occur to be certain.
Although I understand what you mean, that sentence does sound a bit circumlocutious.
I don't mean to be - All I mean to say is that too many things still need to happen to assign a close date.
As an example, three wars - the Ps. 83 war, the War of Magog and Armageddon. There are sequences that seem to occur between these wars requiring a passage of time, and the wars themselves will require time (to include staging). Because of that, one would have to assume enough time for each to flower, and for interim between them.
One cannot suppose these major wars will happen (be completed, w/ interim) within the next five years, to randomly pick a close number. I find it necessary to exercise caution until these (and other things too) come to pass.
It would be presumptuous to do otherwise.