What are the watchtower false prophecies ?

Since they are christians why have they made mistakes and I am just curiousWhat are the watchtower false prophecies ?
Here is some of them and if you really want more there is many many more then what I will post.


1889 ';The 鈥榖attle of the great day of God almighty鈥?(Rev 16:14) which will end in AD 1914 . . . '; (Studies, Vol. 2, 1908 edition, 101).


1891 ';With the end of AD 1914, what God calls Babylon, and what men call Christendom, will have passed away, as already shown from prophecy'; (Studies, Vol. 3, 153).


1894 ';The end of 1914 is not the date for the beginning, but for the end of the time of trouble'; (WT Reprints, 1-1-1894, 1605 and 1677).


1897 ';Our Lord is now present, since October 1874 AD'; (Studies, Vol. 4, 1897 edition, 621).


1916 ';The six great 1000 year days beginning with Adam are ended, and that the great 7th day, the 1000 years of Christ鈥檚 reign began in 1873'; (Studies, Vol. 2, p. 2 of foreword).


1917 ';Scriptures . . . prove that the Lord鈥檚 Second Advent occurred in the fall of 1874'; (Studies, Vol. 7, 68).


1918 ';Therefore, we may confidently expect that 1925 will mark the return of Abraham, Isaac, Jacob, and the faithful prophets of old'; (Millions Now Living Will Never Die, 89).


1922 ';The date 1925 is even more distinctly indicated by the scriptures than 1914'; (WT, 9-1-1922, 262).


1923 ';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'; (WT, 4-1-1923, 106).


1925 ';The year of 1925 is here. . . . Christians should not be so deeply concerned about what may transpire this year'; (WT, 1-1-1925, 3).


1931 ';There was a measure of disappointment on the part of Jehovah鈥檚 faithful ones on earth concerning the dates 1914, 1918, %26amp; 1925 . . . and they also learned to quit fixing dates'; (Vindication, 388, 389).


1939 ';The disaster of Armageddon is just ahead'; (Salvation, 361).


1941 ';Armageddon is surely near . . . soon . . . within a few years'; (Children, 10).


1946 ';Armageddon . . . should come sometime before 1972'; (They Have Found a Faith, 44).


1966 ';Six thousand years from man鈥檚 creation will end in 1975, and the seventh period of a thousand years of human history will begin in the fall of 1975 C.E'; (Life Everlasting in Freedom of the Sons of God, 29).


1968 ';The end of the six thousand years of man鈥檚 history in the fall of 1975 is not tentative, but is accepted as a certain date'; (WT, 1-1-1968, 271).