He spoke to the media at the Oakland headquarters of his Family Radio International, which spent millions of dollars - some of it from donations made by followers - on more than 5,000 billboards and 20 RVs plastered with the Judgment Day message.
It was not the first time Camping was forced to explain when his prediction didn't come to pass. The 89-year-old retired civil engineer also prophesied the Apocalypse would come in 1994, but said later that didn't happen then because of a mathematical error.
Through chatting with a friend over what he acknowledged was a very difficult weekend, it dawned on him that instead of the biblical Rapture in which the faithful would be swept up to the heavens, May 21 had instead been a "spiritual" Judgment Day, which places the entire world under Christ's judgment, he said.
The globe will be completely destroyed in five months, he said, when the apocalypse comes. But because God's judgment and salvation were completed on Saturday, there's no point in continuing to warn people about it, so his network will now 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."