Is today the day the world will end?
21 May 2011 Last updated at 07:19 BST
US atheists are to hold parties in response to an evangelical broadcaster's prediction that Saturday will be "judgement day".
Harold Camping, 89, predicts that Jesus Christ will return to earth on Saturday and true believers will be swept up, or "raptured", to heaven.
He has used broadcasts and billboards to publicise his ideas.
Andy Moore reports.