I created a chart to show that hardly anything of what Joel specified happened on the Day of Pentecost. None of it happened at the DOJ. A lot of it happened during the early years of the church. All of it will happen at or before the Second Coming. You should notice that “last days” is plural and covers an unknown number of days. You assume the “last days” covered 40 years which is only an assumption. The assumption has no merit because many events were not fulfilled by the time of the DOJ, but you resort to fantasy to make it happen. The prophets foresee all of it happening before “the great and glorious day of the Lord shall come”; “before”, not “at”. These things didn’t happen before the day of Pentecost or the DOJ, but they will happen before the return of Christ on that great and glorious day.
You claim that there can only be 13870 days in the “last days”. The Bible teaches there are a lot more than that. The last days are to witness all of the things of which Joel spoke, but they have not happened yet. Therefore, the last days are not yet finished. We still have more to come before “the great and glorious day of the Lord”. Not one of these things that Joel has spoken shall want his mate (Isa 34:16).
James