For some, it’s Judgment Day. For others, it’s party time.

A loosely organized Christian movement has spread the word around the globe that Jesus Christ will return to Earth on Saturday to gather the faithful into heaven. While the Christian mainstream isn’t buying it, many other skeptics are milking it.

Additional Photos

A member of the Family Radio group proseletyzes Saturday at the International Food Festival in New York. The group’s creator, Harold Camping, calculates The Rapture will occure May 21. The Associated Press

A Facebook page titled “Post rapture looting” offers this invitation: “When everyone is gone and god’s not looking, we need to pick up some sweet stereo equipment and maybe some new furniture for the mansion we’re going to squat in.” By Wednesday afternoon, more than 175,000 people indicated they would be “attending” the “public event.”

The prediction is also being mocked in the comic strip “Doonesbury” and has inspired “Rapture parties” to celebrate what hosts expect will be the failure of the world to come to an end.

In the Army town of Fayetteville, N.C., the local chapter of the American Humanist Association has turned the event into a two-day extravaganza, with a Saturday night party followed by a day-after concert.

“It’s not meant to be insulting, but come on,” said organizer Geri Weaver. “Christians are openly scoffing at this.”

The prediction originates with Harold Camping, an 89-year-old retired civil engineer from Oakland, Calif., who founded Family Radio Worldwide, an independent ministry that has broadcast his prediction around the world.

The Rapture — the belief that Christ will bring the faithful into paradise prior to a period of tribulation on Earth that precedes the end of time — is a relatively new notion compared to Christianity itself, and most Christians don’t believe in it. And even believers rarely attempt to set a date for the event.

Camping’s prophecy comes from numerological calculations based on his reading of the Bible, and he says global events like the 1948 founding of Israel confirm his math.

He has been derided for an earlier apocalyptic prediction in 1994, but his followers say that merely referred to the end of “the church age,” a time when human beings in Christian churches could be saved. Now, they say, only those outside what they regard as irredeemably corrupt churches can expect to ascend to heaven.

Such predictions are nothing new, but Camping’s latest has been publicized with exceptional vigor — not just by Family Radio but through like-minded groups. They’ve spread the word using radio, satellite TV, daily website updates, billboards, subway ads, RV caravans hitting dozens of cities and missionaries scattered from Latin America to Asia.

“These kinds of prophecies are constantly going on at a low level, and every once in a while one of them gets traction,” said Richard Landes, a Boston University history professor who has studied such beliefs for about 20 years.

The prediction has been publicized in almost every country, said Chris McCann, who works with eBible Fellowship, one of the groups spreading the message.

In Vietnam, the prophecy has led to unrest involving thousands of members of the Hmong ethnic minority who gathered near the border with Laos earlier this month to await the May 21 event.

Marie Exley, who left her home in Colorado last year to join Family Radio’s effort to publicize the message, just returned from a lengthy overseas trip that included stops in the Middle East. She said billboards have gone up in Israel, Jordan, Lebanon and Iraq.

“I decided to spend the last few days with my immediate family and fellow believers,” Exley said. “Things started getting more risky in the Middle East when Judgment Day started making the news.”

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