https://en.wikipedia.org/wiki/List_of_dates_predicted_for_apocalyptic_events
Perhaps not surprisingly, most end-times predictions are expected to happen within the lifetime of the person who was doing the math. JWs are familiar with this, as the end-times predictions made by the society were often expected to happen shortly. Ironically, Russell might be the most notable exception, as he was pegging the 1914 date at least 20 years prior, and barely lived to see it fail.