In 1823, John Aquila Brown (a man who is NOT mentioned in ANY WT publication) came up with a bizarre mathematical calculation which totalled 2,520 years (in an unauthorized attempt to predict the END of the Gentile Times)...
Several religions recycled this bizarre calculation, including the Adventists and the Bible Students... When Armageddon didn't come on the variety of early 20th century dates predicted by several "dooms-day" religions of that time (including Charles Taze Russell's Bible Students who predicted that the Big A would start in 1914), they all finally realized that this 2,520-year calculation was nothing more than arbitrary mathematical speculation derived from erratic Biblical extrapolation.... except for the Bible Students who continued to move up the date for Armageddon 2 more times (1918, 1925) and then decided to use WWI as the starting point for the "Last Days".
All the while, one thing that seems to remain intact is the October 2, 1914 date. Oddly, for the Watchtower Bible & Tract Publishing Cult, this particular date still marks the end of the 2,520-year period (that John Aquila Brown referred to in his bizarre 1823 book "The Even Tide")... Again, no mention of this in ANY Watchtower publication. But, for JWs, that date still remains the starting point for the period of time often referred to as the "Last Days" or even "the generation that shall not pass".
Because of this, the Governing Body has been forced to change the definition of "the generation that shall not pass" countless times since the early 1970's. But the expiration date of this latest definition is quickly approaching as well as the 100-year anniversay of the END of the Gentile Times (October 2, 2014).
Note to Governing Body: By now, I think you all realize that you are looking like clueless fools. That being said, in 940 days, your credibility will plummet to an all-time low... Do yourselves a favor NOW and admit that this entire doctrine is completely un-Biblical and unauthorized (Acts 1:7).
You have exactly 940 days remaining (until October 2, 2014)... Your time starts... NOW