Have the Jehovah's Witnesses predicted the end of the world? I have heard somewhere that at various times in the past, the Jehovah's Witnesses (Watchtower Bible &amp; Tract Society) have predicted when the end of the world would be and perhaps when Jesus would return to earth.

What are the specifics about these prophecies, and when exactly is the end of the world or Christ's return supposed to occur?
I believe they have for 1914 &amp; 1925, but I may be missing some years.

Adding some info from the below source per request;


  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, 1908 edition, p. 101).
  
  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,
  p. 89).
  
  1922 "The date 1925 is even more distinctly indicated by the
  Scriptures than 1914," (Watchtower, Sept. 1, 1922, p. 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," (Watchtower, Apr. 1, 1923, p. 106).


Below indicate the claim to be prophets;


  "So does Jehovah have a prophet to help them, to warn them of dangers
  and to declare things to come? These questions can be answered in the
  affirmative. Who is this prophet?...This "prophet" was not one man,
  but was a body of men and women. It was the small group of footstep
  followers of Jesus Christ, known at that time as International Bible
  Students. Today they are known as Jehovah's Christian Witnesses...Of
  course, it is easy to say that this group acts as a 'prophet' of God.
  It is another thing to prove it," (Watchtower,  Apr. 1, 1972, p. 197).
  (See Deut. 18:21.)


All taken from this Source