In Scripture, numbers have significance, this is true, but what is more significant, is that there is
no weekly 8th anything, not in type, or prophecy.
As another erroneously attempted by saying earlier,
"If the week of 7 days starts at 1 what does that make the 8th day of the month? I think it is also the first day of the next week. Our calendar doesn't number every week from 1 to 7."
Yet, we see by that statement it is not the 8th day of the week {which is 7 days long, in all of Scripture},
but of the Month. And if we continue with that persons math and logic, the following weekly first day {of 7}, would be not another 8th, but rather the 15th, and the following first day of the week, a 22nd, and the following weeks {of 7 days} first day would be the 29th.
No matter how one attempts it calendrically, there is no such thing as every first day of the week being an 8th day of anything, especially since the Scripture declares the language of "first [day] of the week", and nothing about an "eighth", and in the Greek, the culmination is the 7th, the Sabbath of the Lord thy God, and again not an mystical gnostic eighth.
They think that by saying, "Our calendar doesn't number every week from 1 to 7" solves the problem, when yet, it destroys their position, seeing as how they must use the Biblical week {1-7} to arrive at their conclusion, only to turn around and cast it away, yet still holding to an 8th day of the week error.
These are but futile attempts at justifying the gnostic ogdoad, without admitting that is the real origin of it. Why not just admit it, and cease from trying to force Scripture to mutate to it, those that first advocated it did so, and it was only later attempted to be justified through Scripture after the fact of its adoption.