Here are a few more, re 1975, from the TIME archive. A bit of backwards reflection. Bolding is mine.
TIME, Monday, Feb. 13, 1978
GROWTH ARRESTED
Next to their end-of-the-world expectations and their refusal to accept blood transfusions, the Jehovah's Witnesses are most noted for their dogged door-to-door evangelism. For more than three decades, that has paid off with one of the steadiest records of growth in Western religion. Yet according to the Witnesses' new Yearbook, the number of active members in the U.S. dropped by 2.6% (to 530,374) for 1977, the first decrease since World War II. Worldwide, the Witnesses, who often suffer persecution overseas, declined by 1%. Besides that, the number of baptisms of new U.S. converts has dropped 65% over two years.
At their Brooklyn headquarters, the Witnesses suggest that the decrease in active members may stem from "a problem in receiving accurate reports" because of a new rotation system for officers of local congregations. Outsiders speculate that the Witnesses might be in trouble because of disappointment that the world did not end in 1975, as the faith's leaders had predicted. Reviewing the new figures, the official Watchtower newspaper comments: "As we approach the end, times get harder."
http://www.time.com/time/magazine/article/0,9171,915927,00.html
TIME, Thursday, Oct. 15, 1992
Waiting for The End of the World
There's an undeniable tingle about 1,000 years. Some of it stems from the magical allure of special numbers, and some of it from Scripture. The 20th chapter of the New Testament book of Revelation (or Apocalypse) inscribes a famous vision of martyrs who "reigned with Christ a thousand years." This is the origin of the celebrated capital-M Millennium (from the Latin for thousand).
Most branches of Christianity agree with St. Augustine that the 1,000 years stand symbolically for the ongoing spiritual hegemony of Jesus Christ. An onward-and-upward millennial version holds that believers will gradually establish a kingdom of peace and righteousness on earth, preparing for Christ's Second Coming. There has always been a millenarian undercurrent, however, that rejects symbolism and holds Revelation 20 to mean that Jesus will return to rule an earthly kingdom for literally 1,000 years.
Millennial expectations and predictions have been occurring ever since the time of Jesus, but most, oddly, bear no relation to the actual beginning of new centuries. One of the bloodiest episodes came during the German Peasants' War of 1524-25, in which preacher Thomas Muntzer, whose ravings anticipated Marx by centuries, played a leading role. American preacher William Miller prophesied that Jesus would return in 1843 or 1844. Enthusiastic Millerites ; waited eagerly, only to see several deadlines pass uneventfully. Many Jehovah's Witnesses, led to expect the End, most recently in 1975, have left the apocalyptic group in confusion. The latest bout of millennial fever is said to be occurring among Christians in central China.
The remedy for such supposedly biblical miscalculations can be found in the Bible itself. Concerning the End, Jesus told his followers that "you know neither the day nor the hour." And St. Peter's second Epistle reminds believers that "with the Lord one day is as a thousand years, and a thousand years as one day." Good verses to memorize as Anno Domini 1999 approaches.
http://www.time.com/time/magazine/article/0,9171,976760,00.html