J. Richard Gott in 1969 came to the Berlin Wall and wondered how long it would last. He reasoned that, his arrival not being at any special time, whenever he arrived would be equally likely – unless he knew better – and so he must have arrived at the half way point of the Berlin Wall’s existence: since there was a 50% chance he could have arrived before the halfway point and 50% chance he could have arrived after it. This lead him to the ‘Copernicus Method’, which simply states that – unless we know better – our best guess for how long something will last is ‘exactly as long as it has lasted already’.
The last Prophet, Muhammad, said in a rigorously authentic narration, “I and the (last) Hour have been sent like these two.” and he held up together his index and middle finger. This indicates that the emergence of the Prophet Muhammad (the tip of the index finger) and the End of the World (the tip of the middle finger) are close, but how close? It has been 1438 years since the Prophet and according to the Copernicus Method the best guess we have of when the world will end is the year 3455, that is 1438 years from now.