1919 was a convenient date that was able to be used by the WT numerologists to prove that they absolutely were the "faithful and discreet slave." They simply took advantage of different events "Wow we had conventions everywhere, that relates to the book of Revelation ..." (the trumpets, or something) (I don't want to remember how this morning) and the 3 and a half years, and the "sometimes years are literal, sometimes they are symbolic" and "a short time means this" ....... Have I blown your brain yet? Perfect WT style, right? The higher ups were released from prison after 'a short time'.... in 1919.
Without 1919, or ANY kind of ANYthing..... they have no authority....
This is the mental shell game the WT has been playing for years. ;-)