It works very easily - because God's alleged chosen ones in N.Y. State told them so.
The scriptures below will simply be dismissed with trite explanations;
(Numbers 32:13) "So Jehovah’s anger blazed against Israel and he made them wander about in the wilderness for 40 years, until all the generation that was doing evil in the eyes of Jehovah came to its end."
(Job 42:16) "After this Job lived for 140 years, and he saw his children and his grandchildren—four generations." (140 divided by 4 = 35 years long)
(Matthew 24:34) "Truly I say to you that this generation (33CE - 70C.E) will by no means pass away until all these things happen." (37 years long)