Friday the 13th

What it is

Friday the 13th is a date regarded as particularly unlucky in Western tradition. It happens when the thirteenth day of any month lands on a Friday. This combination triggers a deep-seated cultural anxiety. People often view the day as a time for avoiding new ventures or travel. The fear is so common that it has a specific name: paraskavedekatriaphobia. Some individuals alter their daily routines to stay safe. Businesses sometimes report lower activity on these days. The superstition persists despite a lack of evidence for actual danger.

Where it comes from

The roots of this belief are complex and debated. One theory links the number thirteen to Norse mythology, where the trickster Loki arrives as an uninvited thirteenth guest at a dinner, leading to death. Christian traditions also play a role, citing the thirteen people at Jesus's Last Supper before his crucifixion on a Friday. Another popular origin story points to the arrest of the Knights Templar by King Philip IV of France on October 13, 1307. However, historians note that combining Friday and the number thirteen as uniquely unlucky only appears clearly in the nineteenth century. A French play from 1834 mentions a character born on this date suffering misfortune.

What it is for

The primary purpose of fearing this day is to avoid harm. Practitioners of this superstition believe the date carries a higher risk of bad events. They may skip work, avoid flying, or refuse to sign contracts. Some use tattoos of the number thirteen to ward off evil spirits. The goal is protection through avoidance or symbolic counter-measures. It serves as a psychological shield against perceived chaos. The belief reinforces caution during a time thought to be vulnerable.

Who does it

This belief is held by ordinary households and individuals in Western societies. It does not require specialized training or initiation. Anyone can adopt the fear or the rituals associated with it. In the United States, millions reportedly feel some level of anxiety about the date. The fear crosses social boundaries, affecting both working-class and professional groups. Some organizations even use the day for safety awareness campaigns, turning fear into public service.

Peoples and places

The superstition is strongest in Western cultures, particularly in the United States and France. In Italy, the unlucky day is actually Friday the seventeenth, due to Roman numeral symbolism. Hispanic countries and Greece consider Tuesday the thirteenth to be the unlucky day, linked to the god Ares. These variations show how different cultures assign bad luck to specific numbers and weekdays. The American version has spread globally through media and commerce, influencing other regions.

What people believe

The worldview behind this superstition assumes that time itself can carry moral weight. Certain alignments of numbers and days are believed to attract negative forces. The number thirteen is seen as incomplete or disruptive, while Friday is associated with sorrow or sacrifice. Together, they create a perfect storm of misfortune. This reflects a broader folk belief in sympathetic magic, where symbols influence reality. People who hold this view often feel that the universe is conspiring against them on this specific day.

How scholars and sceptics see it

Researchers have studied the economic and psychological impacts of this superstition. Studies on accident rates and stock market performance generally find no significant correlation between Friday the thirteenth and negative outcomes. In fact, some data suggests fewer accidents occur because people drive more carefully. Psychologists view the fear as a form of conditional anxiety or pattern recognition gone awry. Skeptics argue that the belief is a self-fulfilling prophecy driven by cultural conditioning rather than any inherent danger in the calendar.

Compare and confuse

Friday the thirteenth is often confused with general numerophobia or fear of Fridays alone. It shares traits with the Ides of March, another date feared for betrayal. In Italy, it is compared to Friday the seventeenth, which holds the same superstitious role. In Greece and Hispanic cultures, Tuesday the thirteenth serves the same function. These comparisons highlight how different societies map bad luck onto their calendars. The core mechanism remains similar: assigning negative energy to specific temporal markers.

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
• Wikidata recordOpen data