Friday the 13th

What it is

Friday the 13th is a widely recognized date in Western culture that carries a reputation for misfortune. It occurs whenever the thirteenth day of a month lands on a Friday within the Gregorian calendar system. This alignment happens at least once every year, though it can appear up to three times in a single twelve-month period. The concept relies on the combined negative associations of both the number thirteen and the day Friday. Many people view this specific combination as particularly inauspicious, leading to altered behaviors or heightened anxiety among those who subscribe to the belief.

Where it comes from

The roots of this superstition are debated and likely stem from multiple historical threads rather than a single event. One theory points to Norse mythology, where the trickster god Loki arrived uninvited as the thirteenth guest at a dinner in Valhalla, leading to the death of Balder. Another connects to Christian traditions, noting that thirteen individuals were present at Jesus's Last Supper before his crucifixion on Good Friday. Some also cite the arrest of the Knights Templar by King Philip IV of France on October 13, 1307, though historians note these origins remain murky. The two concepts were not explicitly linked as a singular unlucky date until the nineteenth century.

How it is done

There is no ritual or ceremony associated with this date. Instead, the practice involves psychological avoidance or behavioral changes driven by fear. Individuals who experience paraskavedekatriaphobia may skip work, avoid air travel, or alter their daily routines to steer clear of perceived danger. Conversely, some tattoo enthusiasts treat the day as a celebration, getting inked to ward off future bad luck. In Finland, the date is utilized for public safety campaigns regarding automotive accidents, transforming the feared day into one of preventative awareness.

What it is for

The primary purpose of the belief is to explain or anticipate misfortune. People who hold the superstition use the date as a framework for understanding why things might go wrong. For others, the date serves as a commercial opportunity or a social event, such as the tattoo holiday mentioned in recent years. The fear itself drives economic estimates suggesting significant financial losses due to reduced business activity, although airlines report no noticeable drop in passengers.

Who does it

The practitioners of this belief are ordinary households and individuals within Western cultures who subscribe to folk superstitions. There are no specialized priests, shamans, or trained experts required to observe the date. The fear is personal and internal, affecting millions of people who may feel paralyzed by anxiety on this specific day. Scholars and statisticians study the phenomenon to understand its impact on human behavior and economics.

Peoples and places

The superstition is most prominent in Western countries, including the United States, France, and Italy. However, cultural variations exist. In Italian culture, Friday the seventeenth is traditionally considered the unlucky day due to Roman numeral symbolism, while thirteen is often seen as lucky. Greek and Hispanic cultures associate bad luck with Tuesday the thirteenth, linking it to the god Ares and historical events like the fall of Constantinople. These differences highlight how local history shapes which days are viewed as ominous.

What people believe

The worldview behind this superstition rests on numerology and the symbolic weight of days. The number thirteen is historically viewed as incomplete or disruptive, often standing apart from the completeness of twelve. Friday holds negative connotations in various religious and mythological contexts. When these two elements combine, believers see a convergence of negative forces. Skeptics and researchers attribute the fear to cognitive biases and confirmation bias, where people notice negative events on this day while ignoring neutral ones.

How scholars and sceptics see it

Researchers have studied the statistical reality of this date to test the claims of bad luck. Studies analyzing hospital admissions for transport accidents found no correlation between Friday the thirteenth and increased injury rates; in fact, some data suggests driving may be slightly safer due to cautious behavior. Insurance statistics in the Netherlands support this, showing fewer accident reports on these days. Psychologists classify the fear as a specific phobia, noting that while the anxiety is real for sufferers, the external danger is largely imagined.

Questions people ask about Friday the 13th

Good reading and sources

• Friday the 13th Superstitions Rooted in Bible and MoreNational Geographic, Article
• Who’s Afraid of Friday the Thirteenth?Library of Congress, Article

• Friday the 13th on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos and video
• Wikidata recordOpen data