Jehovah's Witnesses
From Wikireligion
Jehovah's Witnesses are an international Christian denomination whose members believe that their faith is the restoration of first-century Christianity. Believing that all other religions are false, Jehovah's Witnesses reject traditional Christian doctrines such as the Trinity, eternal torment in hell and the immortality of the soul. The central theme of their preaching is God’s Kingdom (that is, God's rule over the Earth) with Jesus Christ as its king. The Witnesses believe this rule began with the Second Coming or presence of Christ. Originally, this was believed to have occurred invisibly in 1874, but this date was later revised to 1914.
In areas where they are active, they are commonly known for their door-to-door preaching and their objection to blood transfusions, and for not celebrating birthdays and most holidays. Their most widely-known publications are the religious magazines, The Watchtower and Awake!. Official membership of the organization, counted as those who preach each month, is estimated to be about 6.5 million.