Yes, the end came in 1975 or before the 20th century ended, the end came in 1914, 1915, 1925 and a handful of other times after that. Even prior to Jehovah's Witnesses, the end came for the the Millerites in 1844 and originally for C.T. Russell in 1874.
Just name a date or an expected approximate time and I will give you odds that we will be here after that date. We can have lunch in 2013, 2015 after the 100 year anniversary of "the last days," and again right after the overlap generation passes away. Well, our grandkids can make that lunch date because the overlap will stretch way past our lives.