Why? While most JWs don't really think of 1919 much and I doubt most even know the formula to get there, the date serves as something that reassures JWs that their leadership is special. They had to be chosen, otherwise their crazy shit just wouldn't make sense. How could someone put trust in a group of men if they weren't guided and directed by God?
Since JWs are programmed to trust only wts, it's easy for them to buy into this idea especially since no other group of men on earth taught what Bible Students did regarding trinity, soul and hellfire. Right? Or should we say, so they think.
I don't remember when this crap had began to be taught and in what form since there was no gb prior to the 70s and until '43 official doctrine was that Jesus returned in 1874. Also some scriptures are used to mean literal numbers and some as figurative, in other words wts pulled shit out of their ass and made it fit so the result was 1919. From the fall of 1914 they use the Rev11:3 to represent 1260 days or 3.5 years which takes them to early 1918 where they claim the 2 witnesses were killed. This supposed to represent Rutherford and the gang going off to prison and the next set of numbers from Rev 11:11 had to obviously be symbolic, meaning a short time. So after Rutherford got out of jail, this had to be the time when Jesus chose them. I think that's how this goes but I can't believe that I accepted this nonsense for so long, while really never thinking too deeply on this very thing.