Until people start questioning the overlapping generation teaching 1914 can be used for at least another 50 years.
Now if they said they made a mistake in the math by 100 years and that Christ was enthroned in heaven in 2014 that would make more sense for an end times cult. It would renew the urgency for the ones that would stay and there are enough brain dead dubs that would lap it up and say "what a loving provision from Jehovah"