I must relate a humorous event regarding the 1975 aftermath.
My cousin's husband is a very righteous elder, one of the pillars of the city congregations. They were married in 1973, just as the Armageddon fever was reaching it's climax.
About four years ago, there was a WT article that talked about brothers who go beyond the society's teachings. My cousin's husband was conducting, and he made a special point of highlighting the 1975 issue, saying that it never reallly happened. Good Witnesses of the day did not believe that 1975 would be the end.
Well, about a week later, at his 25th anniversary party, a tape was played. It was an older brother who had written and performed a song for the young couple. At one point in the song, the words were "If you can make it through to 75, you can make it for a thousand years".
The line hung there like a big motza ball. Everyone had forgotten it for 25 years, but there was the evidence, faithfully recorded. Time stopped for a while. Then everyone ignored it and moved on.