The California preacher who predicted the rapture would take place on May 21, now says it will happen in October.
Harold Camping claims he was off by five months due to his miscalculation and the Earth actually will be obliterated on Oct. 21.
He apologized Monday evening for not having the days "worked out as accurately as I could have."
The 89-year-old retired civil engineer previously predicted the Apocalypse would come in 1994 but said later that didn't happen then because of a mathematical error.
Camping said there's no point in continuing to warn people of God's judgment and that his radio network will just play Christian music and programs until the final end on Oct. 21.
"We've always said May 21 was the day, but we didn't understand altogether the spiritual meaning," he said. "The fact is there is only one kind of people who will ascend into heaven. If God has saved them, they're going to be caught up."
Camping's followers have been left feeling misled and confused. Many spent their savings trying to get the preacher's message of the end times out to the public.
"I can't tell you what I feel right now. I don't understand it and I don't know. I don't understand what happened," said Robert Fitzpatrick, one of the few who believed the world would end at 6 p.m. on May 21.
"This is the year. All the calculations say this is the year. It is locked in for 2011, so I don't understand why nothing has happened yet," he continued.
When Camping announced his prediction, the overwhelming majority of Christians around the world rejected the idea that the exact date or time of Jesus' return could be predicted by man.
Tim LaHaye, co-author of the best-selling "Left Behind" novels about the end times, recently called Camping's prediction "not only bizarre but 100 percent wrong!"
He cited the Bible verse Matthew 24:36, "but about that day or hour no one knows" except God.