I've yet to find anyone start a religious group and claim to have insight that A, B or C is going to happen, which is super important because it will be the precursor to The End™ happening, but that it will occur at any other time but the one in which the author is living.
Isaac Newton, who was extremely into his Bible prophecy, apparently predicted the end for 2060, or, to put it more precisely, that 2060 was the latest date it could possibly be. If I recall correctly, this date was arrived at by adding 1260 day/years from Revelation to the coronation of Charlemagne in 800 AD.
Charlemagne also figured in the Nazi political eschatology as the so-called first Reich was allegedly dated from Charlemagne in 800 to 1800, the second Reich under Bismarck in 1871 to 1917, and the Third Reich from 1933, which was intended to last 1000 years, but was defeated after just 12 years, in 1945.