1. The Lord said 34 Verily I say unto you, This generation shall not pass, till all these things be fulfilled. in Matthew 24.
Now "all these things" clearly referred to the destruction of the temple in AD 70 when He said there shall not be left here one stone upon another and clearly refers to the end of the age when He says "And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come."
The destruction of the temple in AD 70 was in "this generation" or in "His nativity". It is believed that He was crucified in AD 30 and 40 years later the Temple was destroyed.
It is also believed that putting these two events together, the start of the age of grace with the end of the age of grace we are being given a pattern.
According to the Bible years are divided up into groups of seven with the seventh year being a sabbath year, and after seven sabbaths the next year, the fiftieth year (the first year of the 8th set of seven years) is the jubilee. 40 x 49 = 1960, add 1960 years to 70 AD and you get 2030 with the Next year being the start of the Millennial reign.
We are told in the Psalms that a generation is 70-80 years, with the difference being "if you are strong" which may indicate if you are rebellious. Jesus was not rebellious, it was 70 years, Israel is rebellious, it will be 80 years.
There are many reasons to understand that everything will be fulfilled by 2030.
Many confuse the word about all these things being fulfilled to think that includes Armageddon, but when Jesus said that concerning the Fig tree generation the context included everything up to the Lord returning in great glory in the clouds. This precedes 'Armageddon.
Israel was reformed in May of 1948, 81 years later would be May 2029, so we understand that the Lord returns in glory prior to the 81st birthday of Israel.
Therefore it is perfectly reasonable to think that the 70th week, the last seven years of this age has already begun. The Lord said 21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be. 22 And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
Yes, the 70th week is 7 years, but the "great tribulation" is shortened. There are many reasons from the book of Revelation to believe that the end of the 70th week is "set in stone" and will fulfill the Fall feasts. Therefore if the time is shortened you have to delay the beginning of the tribulation.
It stands to reason that if the Fall feasts must be fulfilled to the day, and if no one knows the day or the hour of the rapture, that the rapture takes place not during one of the appointed times of the OT.
So then at this point the only doctrine that has been discarded is the thought that the rapture takes place prior to the 70th week (the Bible never said or even hinted at that). What the Bible does say is some will be kept "from the hour of trial" (a time period that is clearly not equivalent to the 70th week or even to the 42 months before the great tribulation). We still know that when the restrainer is taken out of the way then evil will fall and be revealed on the earth. We also know that the amount of time evil will have to run wild has been shortened for the elects sake.