Click on the picture to embiggificate.
'Amazing Stories' comic back in 1939 suggested that it can happen tomorrow, and this fellow says it will. At 6pm on 21 May, wherever you are, starting with a humungous earthquake. Those who The Almighty deems worthwhile will ascend into heaven in 'The Rapture' and the rest will perish in judgement on Earth five months after that.
So, it's goodnight from me!
On the other hand he could be wrong, but it's not the end of the world if he is. See wikipedia for a summary of some previous predictions.