History of Jehovah's Witnesses
Jehovah’s Witnesses emerged from the Bible Student movement, a restorationist and Adventist-influenced movement founded by Charles Taze Russell in the 1870s. Early Bible Students adopted beliefs associated with Adventist chronology, including Christ’s invisible presence beginning in 1874 and the expectation that the “Gentile Times” would end in 1914.
Source: Wikipedia — History of Jehovah's Witnesses (CC BY-SA 4.0)