1975
I was never supposed to go to school in this system, so I was told. I now have kids in school.
When I inherited a large WT library (about 3 yrs. ago), the 1st thing I did was search the books & bound volumes for the 1975 date. I became sick to my stomach when I found the date in print.
I remember being told that 1975 was the year of the "great cleaning out of Jehovah's organization" of those lacking faith.
I was very curious because I wondered how all of those people could come to the same conclusion about the same date all on their own. Also I knew how the organization felt about independent thinking and that if so many people had been expecting this date, the Society would have definitely corrected their thinking.
I continued my research into even older publications and found that previous dates(false prophecies) had been set by the WT for the return of "faithful men of old" (1925), Jesus second presence (1874), etc.
If I would not have found that date(1975) in print, I don't know where I would be today. Probably still in the org.
-You can lead a fool to wisdom, but you can't make him think.