How you come up with that number?
It is based on the understanding of Jubilees. God gave man 120 Jubilees (Gen 6:3) which are 50 years but the 50th year is also the 1st year in the next cycle. Therefore there is 49 years between them (Lev 25). I was able to see patterns that were pointing to this.
Consider the age of Moses. He was 80 years old when he began to lead his congregation out of Egypt and died at 120 years old before going into the promised land. So I asked what should be asked, like why 80? why die at 120? Why not cross the Jordan? etc... You have to think this way and sort stuff out. Why do we count to Pentecost (50). What is the significance of that. Etc... I was able to see that the Jews used to use the week as years. You can see this evidently in the Book of Jubilees. A very important book for understanding this.
I could see that Daniels 70 weeks were 70 weeks of years also - 490 years (70 * 7). That = 10 Jubilees exactly. Since I knew his prophecy was relating to the point of the Cross, I know that year would be a Jubilee. Now Moses was to be the type of that Prophet that came later. This was referring to Christ.
Act 3:22 For Moses truly said unto the fathers, A prophet shall the Lord your God raise up unto you of your brethren, like unto me; him shall ye hear in all things whatsoever he shall say unto you.
So Moses was a TYPE, I can see the pattern. You see Moses was in the wilderness for 40 years. But Jesus will lead His Congregation for 40 Jubilees. Moses didn't enter the promised land because that is the next dispensation. That was therefore the type that Joshua showed, So Joshua was the type for the 2nd Coming of Jesus. The Book of Jubilees gave us a great reference point in telling us that the 50th Jubilee was the crossing of the Jordan. That was 40 years after the Exodus. So since I knew that Daniels 70 weeks prophecy was 10 Jubilees, I had the 80th Jubilee set to occur in the year that Jesus was resurrected (though that was the sabbatical year still) until the 7th month. Then I knew that Jesus had to be crucified during the 1st of 40 years leading to the destruction of the Temple because that was serving as a type.
But there is way more I have on this. I have mapped out the 24 courses of the Priests, figured out the Jewish calendar as it was during that time, and how to know when Jesus was born. I know when He will return because I have studied the significance of the Candlesticks and how they correlate to the 7 wandering planets (Sun, moon, mercury, mars, venus, saturn, jupiter). Clement of Alexandria referred to that correlation as well as did Philo and Josephus. I then mapped it out and new that the Lord wouldn't return on the 120th Jubilee but on the 121st one because man gets 120 of them. So I could see that the 121st Jubilee would occur when all those wandering stars are coming together towards Virgo in Sept of 2040 precisely at the time of the Fall Festival events such as Trumpets and the Day of Atonement (when the Jubilee is sounded).
It is not a coincidence. To me if far too statistically significant (though I gathered none) in my mind. And now when I go back I can see it being confirmed by the archeological records and more. I have far more data I could prove but ask questions. The time is sure.