http://ty.rannosaur.us/10-doomsday-cults/
3. The Jehovah’s Witnesses
In 1875, Charles Taze Russell , the son of a wealthy haberdasher, used his wealth to inform as many people as possible that the Armageddon would take place in 1878. 1878 passed without a blip but Russell was unphased: he simply created an organization which transformed into the Jehovah’s Witnesses and issued another date. Russell taught that Jesus had secretly been enthroned in heaven in 1914 and will return after the Armageddon, which only Jehovah’s Witnesses will survive. After ruling for 1,000 years, Jesus will return to heaven with the most righteous 144,000 souls. The remaining Jehovah’s Witnesses need not worry as they’ll get to enjoy paradise on Earth. Russell developed complicated algorithms to issue alerts about when Armageddon would occur and continued to do so even after the dates kept passing without anything happening. His death in 1916 didn’t seem to deter the organization from arbitrarily announcing a new date either. Jehovah’s Witnesses kept issuing dates until a mass walkout of members in 1976. Since then they’ve been reluctant to say when the Armageddon will occur, but still uphold that it can happen at any moment.