Round that down to the nearest integer, and you get 722,500, which is an important number because it is the square of 5 x 17 x 10 . The number five, says Camping, represents atonement. Ten represents completeness, and 17 represents heaven. Multiply all these together – twice – and you get 722,500. Therefore the apocalypse kicks off on Saturday, May 21.
Skeptics of Camping's method might ask why the date of the end of the world is linked to that of Jesus' crucifixion, why the numbers five, 10, and 17 represent what Camping claims they represent, why they should be multiplied together, why they should then be squared, and, for that matter, why the Bible would contain esoteric numerological references predicting the end of the world in the first place. They could also point out that April 1, 33 AD was actually a Wednesday, and that, under Camping's method, April 1, 2011 gets counted twice.
Others use different methods to calculate the last day. For example, Dec. 21, 2012 marks the end of the 5,125-year-long cycle in the Mesoamerican Long Count calendar, leading some people – particularly those who believe that the dating systems of pre-Columbian Americans can predict events hundreds of years in the future – to believe that the world will end on that date.
While some evangelical Christians are preparing to be taken away to heavenly realms, the less devout have been trying to profit off the prophecy.
Family Radio, a non-profit, listener-supported religious organization based in Oakland, Calif., has declared that May 21 will mark the end of the world, when Jesus Christ arrives for his second coming and the "rapture" of his believers.
Gunther von Harringa, spokesman for Family Radio and president of Bible Ministries International, said it is "ludicrous" to think that businesses will be able to function after Judgment Day. However, that's not stopping people from trying to make money for a tomorrow some think will never come.
Five Businesses Hoping to Reap the Rewards of the Rapture:
1. External Earthbound Pets
Eternal Earthbound Pets offers a service to rescue and take care of pets once their owners are no longer earthbound.
Bart Centre of New Hampshire, co-owner of the pet business, launched it in June 2009. He has zero belief in Judgment Day, but began to see an increase in sales inquiries in December, which, he believes, is related to Family Radio's heavy marketing campaign around the May 21 date.
May 21st Doomsday Comes to New York Watch Video
Doomsday: May 21, 2011? Watch Video
A 'View' of May 21st Doomsday Watch Video
Sales increased during the first quarter of this year by 27 percent compared with the first quarter of last year, which Centre attributes to the May 21 campaign. Centre increased his rates in January. It now costs $135 to rescue one pet and $20 for an additional pet at the same address, which he collects up front. That's up from $110 for the first pet and $10 for an additional pet.
2. Post-Rapture Post
Post-Rapture Post is a message delivery service to those left behind after the apocalypse. Joshua Witter started the website in 2004 after a casual conversation with his friends about what believers might want after they leave their non-believing loved ones behind.
Witter, an atheist, charges $4.99 to $799.99 to deliver a pre-written letter to those loved ones. Ritter said he suspects the postal service and email services will not be available.
Witter, the postmaster general of the Post-Rapture Post, said he has only sold his simplest letter product at $1.99, although he does offer more elaborate options. For $800, a calligrapher (a friend of his) will handwrite your letter on "medieval parchment style paper."
Witter, who has another day job, said there has not been renewed interest as a result of the May 21 campaign.
3. Northwest Shelter Systems
Kevin Thompson, co-owner of Northwest Shelter Systems, based in Idaho, said concerns about a nuclear disaster -- not Judgment Day -- have driven recent sales of his hidden rooms and bomb shelters.
"We're not a doom-and-gloom company by any means," he said. "People are still purchasing shelters from us for a number of other reasons."
Sales have increased 60 to 70 percent since the start of this year, he said. He attributes the growth mostly to the tsunami and earthquake in Japan in March, and especially the resulting concerns about radiation emitting from the Fukushima plant, north of Tokyo.
4. End of the World Parties
Bars and clubs across the country are hosting parties to commemorate the occasion. Fittingly, the Tavern at the End of the World, in Boston, is hosting an End of the World Party tomorrow evening. Manager Raymond O'Neill says he has been fielding lots of calls for the event and expects it will be good for business.
In Atlanta, the Via Restaurant is hosting The End of the World Party tonight and operating partner Derrick Silvera says he too anticipates an increase in business.
May 21st Doomsday Comes to New York Watch Video
Doomsday: May 21, 2011? Watch Video
A 'View' of May 21st Doomsday Watch Video
"It's a good excuse to throw a party," Silvera said. "We've been telling people to park wherever you want because your car won't be there when the party is over."
5. "Left Behind" Book Series
Jerry Jenkins, the writer behind the Left Behind series of books about the apocalypse, said he has a growing number of media requests regarding the May 21 campaign, although he is not aware of a respective increase in sales.
Jenkins worked with the pastor, Tim LaHaye, for the series' 16 books, which have sold more than 63 million copies, the first published in 1995. Jenkins said the books have been re-released this year with new covers and updated words related to technology in the series. He said the re-release was planned last year and related to the series' 15th anniversary, not the May 21 campaign.