End of the World

Humanity has predicted its own extinction hundreds of times, and has been wrong every single time. End of the World Day falls on May 21, the date that radio evangelist Harold Camping told millions of listeners the Rapture would arrive in 2011, backed by $100 million in advertising and roughly 1,200 billboards across the United States.

The day has since taken on an ironic second life as a reminder that apocalypse predictions are as old as civilization itself, dating to a Mesopotamian clay tablet from nearly 5,000 years ago. Rather than stoking anxiety, the observance invites a look at the psychology, history, and recurring pattern of doomsday forecasts that never delivered.

Predicting the end of the world is one of the oldest recorded human activities. The earliest known example is an Assyrian clay tablet, dated to roughly 2800 BCE, in which the author lamented that the earth had degenerated to a point where destruction was imminent. That tablet was wrong, but the impulse it captured has repeated itself across every major civilization since.

In medieval and early modern Europe, apocalyptic dates picked up speed. Pope Innocent III calculated that the world would end 666 years after the rise of Islam, placing his forecast around 1284. In 1524, a group of English astrologers predicted a great flood, reportedly causing 20,000 Londoners to flee to higher ground.

The Great Disappointment and Its Afterlife

The most consequential failed prophecy in American history came from William Miller, a Baptist preacher who used biblical arithmetic to predict Christ's return by October 22, 1844. An estimated 50,000 to 100,000 followers prepared for the event, with many giving away their possessions. When the date passed without incident, the fallout became known as the Great Disappointment.

Rather than extinguishing the movement, the failure reshaped it. Former Millerites reinterpreted the prophecy and eventually organized into the Seventh-day Adventist Church, which was formally established in 1863 and today has over 21 million members worldwide.

Harold Camping and the Birth of May 21

The date that now anchors the observance comes from Harold Camping, president of the Family Radio network based in Oakland, California. Camping had previously predicted the Rapture for September 1994, which passed without event. Undeterred, he recalculated and announced May 21, 2011, as Judgment Day, deploying roughly 1,200 billboards and broadcasting the message in 84 languages.

Family Radio spent over $100 million on the campaign. When May 21 arrived and no Rapture occurred, Camping said he was "flabbergasted" before revising his prediction to October 21 of the same year. That date also passed quietly. Camping later acknowledged his error, and he died in 2013. The date, however, gained a second life as an ironic, informal observance celebrating humanity's unbroken streak of surviving its own predictions.