Harold Camping's prophecy that the world will end Friday October 21, 2011 will be the prophet's "strike three," according to an expert on religion.

Glenn W. Shuck, a religion expert at Williams College in Williamstown, Mass., said that apart from Camping's close circle of followers, the Christian community should not pay attention to him.

End of the world prophets like Camping usually only get "two strikes," and then they are out, Shuck suggested according to the Christian Post. "For Camping, this will be strike three," the expert added.

Camping, 90, and founder of Family Radio in California, got his "first strike" a decade ago when he predicted that the world would end in September 1994.

When that didn't happen, he said he had miscalculated the biblical dates and corrected his prediction to 2011.

This year, a massive campaign across the United States proclaimed the end of the world would occur on May 21, 2011. Many of his followers reportedly sold his properties and emptied their bank accounts.

But that prophecy was also proved wrong.

Camping said that on May 21 a spiritual rapture occured but again calculated that on October 21st, the physical destruction would judge the rest of the world.