"If what a prophet proclaims in the name of the LORD does not take place or come true, that is a message the LORD has not spoken. That prophet has spoken presumptuously. Do not be afraid of him." Deut. 18:22
The following is a list of false prophecies made by the Jehovah's Witnesses over the past century..
1897 "Our Lord, the appointed King, is now present, since October 1874," (Studies in the Scriptures, Vol. 4, page 621).
1899 "...the battle of the great day of God Almighty' ( Revelation 16:14 ), which will end in A.D. 1914 with the complete overthrow of earth's present rulership, is already commenced." (The Time Is at Hand, page 101 (1908 edition)).
1916 "The Bible chronology herein presented shows that the six great 10000 year days beginning with Adam are ended, and that the great 7th Day, the 1000 years of Christ's Reign, began in 1873." (The Time Is at Hand, page ii, (forward)).
1918 "Therefore we may confidently expect that 1925 will mark the return of Abraham, Isaac, Jacob and the faithful prophets of old, particularly those named by the Apostle in Hebrews 11, to the condition of human perfection." (Millions Now Living Will Never Die, page 89).
1922 "The date 1925 is even more distinctly indicated by the Scriptures than 1914." (The Watchtower 9/1/22, page 262).
1923 "Our thought is, that 1925 is definitely settled by the Scriptures. As to Noah, the Christian now has much more upon which to base his faith than Noah had upon which to base his faith in a coming deluge." (The Watchtower, p. 106 4/1/23).
1925 "The year 1925 is here. With great expectation Christians have looked forward to this year. Many have confidently expected that all members of the body of Christ will be changed to heavenly glory during this year. This may be accomplished. It may not be. In his own due time God will accomplish his purposes concerning his people. Christians should not be so deeply concerned about what may transpire this year." (The Watchtower, 1/1/25, page 3).
1925 "It is to be expected that Satan will try to inject into the minds of the consecrated, the thought that 1925 should see an end to the work." (The Watchtower, Sept, 1925 page 262).
1926 "Some anticipated that the work would end in 1925, but the Lord did not state so. The difficulty was that the friends inflated their imaginations beyond reason; and that when their imaginations burst asunder, they were inclined to throw away everything." (The Watchtower, page 232).
1931 "There was a measure of disappointment on the part of Jehovah's faithful ones on earth concerning the years 1917, 1918, and 1925, which disappointment lasted for a time...and they also learned to quit fixing dates." (Vindication, page 338).
1941 "Receiving the gift, the marching children clasped it to them, not a toy or plaything for idle pleasure, but the Lord's provided instrument for most effective work in the remaining months before Armageddon." (The Watchtower, 9/15/41, page 288).
1968 "True, there have been those in times past who predicted an end to the world', even announcing a specific date. Yet nothing happened. The end' did not come. They were guilty of false prophesying. Why? What was missing?..Missing from such people were God's truths and evidence that he was using and guiding them." (Awake, 10/8/68).
1968 "Why are you looking forward to 1975?" (The Watchtower, 8/15/68, page 494)
The excuse often given for these false prophecies has been to quote Proverbs 4:18 :"But the path of the righteous ones is like the bright light that is getting lighter and lighter until the day it is firmly established."
However, this is not a valid excuse as it in no way refers to the making of false prophecies, but rather refers to the growth in faith of the righteous.