The fear of Friday the 13th is called friggatriskaidekaphobia (Frigga being the name of the Norse goddess for whom "Friday" is named and triskaidekaphobia meaning fear of the number thirteen), or paraskevidekatriaphobia a concatenation of the Greek words Paraskeví (Παρασκευή, meaning "Friday"), and dekatreís (δεκατρείς, meaning "thirteen") attached to phobía (φοβία, from phóbos, φόβος, meaning "fear"). The latter word was derived in 1911 and first appeared in a mainstream source in 1953.
According to folklorists, there is no written evidence for a "Friday the 13th" superstition before the 19th century. The earliest known documented reference in English occurs in Henry Sutherland Edwards' 1869 biography of Gioachino Rossini:
Rossini was surrounded to the last by admiring and affectionate friends; Why Friday the 13th Is Unlucky
Consequently, several theories have been proposed about the origin of the Friday the 13th superstition.
One theory states that it is a modern amalgamation of two older superstitions: that thirteen is an unlucky number and that Friday is an unlucky day.
In numerology, the number twelve is considered the number of completeness, as reflected in the twelve months of the year, twelve hours of the clock, twelve tribes of Israel, twelve Apostles of Jesus, twelve gods of Olympus, etc., whereas the number thirteen was considered irregular, transgressing this completeness. There is also a superstition, thought by some to derive from the Last Supper or a Norse myth, that having thirteen people seated at a table will result in the death of one of the diners.
Friday has been considered an unlucky day at least since the 14th century's The Canterbury Tales, and many other professions have regarded Friday as an unlucky day to undertake journeys or begin new projects. Black Friday has been associated with stock market crashes and other disasters since the 1800s. It has also been suggested that Friday has been considered an unlucky day because, according to Christian scripture and tradition, Jesus was crucified on a Friday.
A theory by author Charles Panati, one of the leading authorities on the subject of "Origins," maintains that the superstition can be traced back to ancient myth:
The actual origin of the superstition, though, appears also to be a tale in Norse mythology. Friday is named for Frigga, the free-spirited goddess of love and fertility. When Norse and Germanic tribes converted to Christianity, Frigga was banished in shame to a mountaintop and labeled a witch. It was believed that every Friday, the spiteful goddess convened a meeting with eleven other witches, plus the devil — a gathering of thirteen — and plotted ill turns of fate for the coming week. For many centuries in Scandinavia, Friday was known as "Witches' Sabbath."
In Spanish-speaking countries, instead of Friday, Tuesday the 13th is considered a day of bad luck, commonly referred to as 'Martes y trece' (Literally translates to: Tuesday and thirteen). The Fall of Constantinople, when the city fell to the Ottomans, marks the end of the Byzantine Empire. It happened on Tuesday, May 29, 1453. That is why the Greeks also consider Tuesday to be an unlucky day.
In the island of Java of Indonesia, Friday which coincided with Pasaran day of Kliwon, or Jumat Kliwon, is considered unlucky. There are movies made about the superstition.
Friday the 13th and The Da Vinci Code
The connection between the Friday the 13th superstition and the Knights Templar was popularized in the 2003 novel The Da Vinci Code. However, some experts think that it is a relatively recent correlation and is a modern-day invention. For example, records of the superstition are rarely found before the 20th century, when it became extremely common. One author, noting that references are all but nonexistent before 1907 but frequently seen thereafter, has argued that its popularity derives from the publication that year of Thomas W. Lawson's popular novel Friday, the Thirteenth, in which an unscrupulous broker takes advantage of the superstition to create a Wall Street panic on a Friday the 13th.
According to the Stress Management Center and Phobia Institute in Asheville, North Carolina, an estimated 17 to 21 million people in the United States are affected by a fear of this day. Some people are so paralyzed by fear that they avoid their normal routines in doing business, taking flights or even getting out of bed. "It's been estimated that [US]$800 or $900 million is lost in business on this day". Despite this, representatives for both Delta and Continental Airlines say that their airlines do not suffer from any noticeable drop in travel on those Fridays.
Rate of accidents
There are conflicting studies about the risk of accidents on Friday the 13th. The Dutch Centre for Insurance Statistics (CVS) on June 12, 2008, stated that "fewer accidents and reports of fire and theft occur when the 13th of the month falls on a Friday than on other Fridays, because people are preventatively more careful or just stay home. Statistically speaking, driving is slightly safer on Friday the 13th, at least in the Netherlands; in the last two years, Dutch insurers received reports of an average 7,800 traffic accidents each Friday; but the average figure when the 13th fell on a Friday was just 7,500. However, a 1993 study in the British Medical Journal that compared the ratio of traffic accidents between Friday the 6th and Friday the 13th stated that there is a significant increase in traffic-related accidents on Friday the 13th. There are indications that there are more accidents on Fridays than average weekdays (irrespective of the date) probably because of alcohol consumption. Therefore it is less relevant for this purpose to compare Friday the 13th with any other 13th day of another month.
Why Friday the 13th Is Unlucky: Paraskevidekatriaphobia: Friday the 13th Origins, History, and Folklore
By David Emery, About.com Guide
I HAVE before me the abstract of a 1993 study published in the British Medical Journal provocatively titled "Is Friday the 13th Bad for Your Health?"
With the aim of mapping "the relation between health, behaviour, and superstition surrounding Friday 13th in the United Kingdom," its authors compared the ratio of traffic volume to the number of automobile accidents on two different days, Friday the 6th and Friday the 13th, over a period of years.
Incredibly, they found that in the region sampled, while consistently fewer people chose to drive their cars on Friday the 13th, the number of hospital admissions due to vehicular accidents was significantly higher than on "normal" Fridays. Their conclusion:
"Friday 13th is unlucky for some. The risk of hospital admission as a result of a transport accident may be increased by as much as 52 percent. Staying at home is recommended."
Paraskevidekatriaphobics — people afflicted with a morbid, irrational fear of Friday the 13th — will be pricking up their ears about now, buoyed by seeming evidence that the source of their unholy terror may not be so irrational after all. But it's unwise to take solace in a single scientific study, especially one so peculiar. I suspect these statistics have more to teach us about human psychology than the ill-fatedness of any particular date on the calendar.
Friday the 13th, 'the most widespread superstition'
The sixth day of the week and the number 13 both have foreboding reputations said to date from ancient times, and their inevitable conjunction from one to three times a year (there happens to be only one such occurrence in 2011, in the month of May) portends more misfortune than some credulous minds can bear. According to some sources it's the most widespread superstition in the United States today. Some people refuse to go to work on Friday the 13th; some won't eat in restaurants; many wouldn't think of setting a wedding on the date.
How many Americans at the beginning of the 21st century suffer from this condition? According to Dr. Donald Dossey, a psychotherapist specializing in the treatment of phobias (and coiner of the term paraskevidekatriaphobia, also spelled paraskavedekatriaphobia), the figure may be as high as 21 million. If he's right, no fewer than eight percent of Americans remain in the grips of a very old superstition.
Exactly how old is difficult to say, because determining the origins of superstitions is an inexact science, at best. In fact, it's mostly guesswork.
LEGEND HAS IT: If 13 people sit down to dinner together, one will die within the year. The Turks so disliked the number 13 that it was practically expunged from their vocabulary (Brewer, 1894). Many cities do not have a 13th Street or a 13th Avenue. Many buildings don't have a 13th floor. If you have 13 letters in your name, you will have the devil's luck (Jack the Ripper, Charles Manson, Jeffrey Dahmer, Theodore Bundy and Albert De Salvo all have 13 letters in their names). There are 13 witches in a coven.
The Devil's Dozen
Although no one can say for sure when and why human beings first associated the number 13 with misfortune, the superstition is assumed to be quite old, and there exist any number of theories — most of which deserve to be treated with a healthy skepticism, please note — purporting to trace its origins to antiquity and beyond.
It has been proposed, for example, that fears surrounding the number 13 are as ancient as the act of counting. Primitive man had only his 10 fingers and two feet to represent units, this explanation goes, so he could count no higher than 12. What lay beyond that — 13 — was an impenetrable mystery to our prehistoric forebears, hence an object of superstition.
Which has an edifying ring to it, but one is left wondering: did primitive man not have toes?
Life and death
Despite whatever terrors the numerical unknown held for their hunter-gatherer ancestors, ancient civilizations weren't unanimous in their dread of 13. The Chinese regarded the number as lucky, some commentators note, as did the Egyptians in the time of the pharaohs.
To the ancient Egyptians, these sources tell us, life was a quest for spiritual ascension which unfolded in stages — twelve in this life and a thirteenth beyond, thought to be the eternal afterlife. The number 13 therefore symbolized death, not in terms of dust and decay but as a glorious and desirable transformation. Though Egyptian civilization perished, the symbolism conferred on the number 13 by its priesthood survived, we may speculate, only to be corrupted by subsequent cultures who came to associate 13 with a fear of death instead of a reverence for the afterlife.
Still other sources speculate that the number 13 may have been purposely vilified by the founders of patriarchal religions in the early days of western civilization because it represented femininity. Thirteen had been revered in prehistoric goddess-worshiping cultures, we are told, because it corresponded to the number of lunar (menstrual) cycles in a year (13 x 28 = 364 days). The "Earth Mother of Laussel," for example — a 27,000-year-old carving found near the Lascaux caves in France often cited as an icon of matriarchal spirituality — depicts a female figure holding a cresent-shaped horn bearing 13 notches. As the solar calendar triumphed over the lunar with the rise of male-dominated civilization, it is surmised, so did the "perfect" number 12 over the "imperfect" number 13, thereafter considered anathema.
On the other hand, one of the earliest concrete taboos associated with the number 13 — a taboo still observed by some superstitious folks today, apparently — is said to have originated in the East with the Hindus, who believed, for reasons I haven't been able to ascertain, that it is always unlucky for 13 people to gather in one place — say, at dinner. Interestingly enough, precisely the same superstition has been attributed to the ancient Vikings (though I have also been told, for what it's worth, that this and the accompanying mythographical explanation are apocryphal). The story has been laid down as follows:
And Loki makes thirteen
Twelve gods were invited to a banquet at Valhalla. Loki, the Evil One, god of mischief, had been left off the guest list but crashed the party, bringing the total number of attendees to 13. True to character, Loki raised hell by inciting Hod, the blind god of winter, to attack Balder the Good, who was a favorite of the gods. Hod took a spear of mistletoe offered by Loki and obediently hurled it at Balder, killing him instantly. All Valhalla grieved. And although one might take the moral of this story to be "Beware of uninvited guests bearing mistletoe," the Norse themselves apparently concluded that 13 people at a dinner party is just plain bad luck.
As if to prove the point, the Bible tells us there were exactly 13 present at the Last Supper. One of the dinner guests — er, disciples — betrayed Jesus Christ, setting the stage for the Crucifixion.
Did I mention the Crucifixion took place on a Friday?
LEGEND HAS IT: Never change your bed on Friday; it will bring bad dreams. Don't start a trip on Friday or you will have misfortune. If you cut your nails on Friday, you cut them for sorrow. Ships that set sail on a Friday will have bad luck – as in the tale of H.M.S. Friday ... One hundred years ago, the British government sought to quell once and for all the widespread superstition among seamen that setting sail on Fridays was unlucky. A special ship was commissioned, named "H.M.S. Friday." They laid her keel on a Friday, launched her on a Friday, selected her crew on a Friday and hired a man named Jim Friday to be her captain. To top it off, H.M.S. Friday embarked on her maiden voyage on a Friday, and was never seen or heard from again.
Some say Friday's bad reputation goes all the way back to the Garden of Eden. It was on a Friday, supposedly, that Eve tempted Adam with the forbidden fruit. Adam bit, as we all learned in Sunday School, and they were both ejected from Paradise. Tradition also holds that the Great Flood began on a Friday; God tongue-tied the builders of the Tower of Babel on a Friday; the Temple of Solomon was destroyed on a Friday; and, of course, Friday was the day of the week on which Christ was crucified. It is therefore a day of penance for Christians.
In pagan Rome, Friday was execution day (later Hangman's Day in Britain), but in other pre-Christian cultures it was the sabbath, a day of worship, so those who indulged in secular or self-interested activities on that day could not expect to receive blessings from the gods — which may explain the lingering taboo on embarking on journeys or starting important projects on Fridays.
To complicate matters, these pagan associations were not lost on the early Church, which went to great lengths to suppress them. If Friday was a holy day for heathens, the Church fathers felt, it must not be so for Christians — thus it became known in the Middle Ages as the "Witches' Sabbath," and thereby hangs another tale.
The name "Friday" was derived from a Norse deity worshipped on the sixth day, known either as Frigg (goddess of marriage and fertility), or Freya (goddess of sex and fertility), or both, the two figures having become intertwined in the handing down of myths over time (the etymology of "Friday" has been given both ways). Frigg/Freya corresponded to Venus, the goddess of love of the Romans, who named the sixth day of the week in her honor "dies Veneris."
Friday was actually considered quite lucky by pre-Christian Teutonic peoples, we are told — especially as a day to get married — because of its traditional association with love and fertility. All that changed when Christianity came along. The goddess of the sixth day — most likely Freya in this context, given that the cat was her sacred animal — was recast in post-pagan folklore as a witch, and her day became associated with evil doings.
Various legends developed in that vein, but one is of particular interest: As the story goes, the witches of the north used to observe their sabbath by gathering in a cemetery in the dark of the moon. On one such occasion the Friday goddess, Freya herself, came down from her sanctuary in the mountaintops and appeared before the group, who numbered only 12 at the time, and gave them one of her cats, after which the witches' coven — and, by "tradition," every properly-formed coven since — comprised exactly 13.
The astute reader will have observed that while we have thus far insinuated any number of intriguing connections between events, practices and beliefs attributed to ancient cultures and the superstitious fear of Fridays and the number 13, we have yet to happen upon an explanation of how, why, or when these separate strands of folklore converged — if that is indeed what happened — to mark Friday the 13th as the unluckiest day of all.
There's a very simple reason for that: nobody really knows, and few concrete explanations have been proposed.
The Knights Templar
One theory, recently offered up as historical fact in the novel The Da Vinci Code, holds that the stigma came about not as the result of a convergence, but because of a catastrophe, a single historical event that happened nearly 700 years ago. The "catastrophe" was the decimation of the Knights Templar, the legendary order of "warrior monks" formed during the Christian Crusades to combat Islam. Renowned as a fighting force for 200 years, by the 1300s the order had grown so pervasive and powerful it was perceived as a political threat by kings and popes alike and brought down by a church-state conspiracy, as recounted by Katharine Kurtz in Tales of the Knights Templar (Warner Books, 1995):
On October 13, 1307, a day so infamous that Friday the 13th would become a synonym for ill fortune, officers of King Philip IV of France carried out mass arrests in a well-coordinated dawn raid that left several thousand Templars — knights, sergeants, priests, and serving brethren — in chains, charged with heresy, blasphemy, various obscenities, and homosexual practices. None of these charges was ever proven, even in France — and the Order was found innocent elsewhere — but in the seven years following the arrests, hundreds of Templars suffered excruciating tortures intended to force "confessions," and more than a hundred died under torture or were executed by burning at the stake.
There are problems with the "day so infamous" thesis, not the least of which is that it attributes enormous cultural significance to a relatively obscure historical event. Even more problematic for this or any other theory positing premodern origins for Friday the 13th superstitions is the fact that no one has been able to document the existence of such beliefs prior to the late 19th century. If folks who lived in earlier ages perceived Friday the 13th as a day of special misfortune, no evidence has been found to document it. As a result, some scholars are now convinced the stigma is a thoroughly modern phenomenon exacerbated by 20th-century media hype.
Going back more than a hundred years, Friday the 13th doesn't even merit a mention in the 1898 edition of E. Cobham Brewer's voluminous Dictionary of Phrase and Fable, though one does find entries for "Friday, an Unlucky Day" and "Thirteen Unlucky." When the date of ill fate finally does make an appearance in later editions of the text, it is without extravagant claims as to the superstition's historicity or longevity. The very brevity of the entry is instructive: "Friday the Thirteenth: A particularly unlucky Friday. See Thirteen" — implying that the extra dollop of misfortune might be accounted for in terms of a simple accrual, as it were, of bad omens:
UNLUCKY FRIDAY + UNLUCKY 13 = UNLUCKIER FRIDAY
If that's the case, we are guilty of perpetuating a misnomer by labeling Friday the 13th "the unluckiest day of all," a designation perhaps better reserved for, say, a Friday the 13th on which one breaks a mirror, walks under a ladder, spills the salt, and spies a black cat crossing one's path — a day, if there ever was one, best spent in the safety of one's own home with doors locked, shutters closed, and fingers crossed.
Postscript: A novel theory
In 13: The Story of the World's Most Popular Superstition (Avalon, 2004), author Nathaniel Lachenmeyer argues that the commingling of "unlucky Friday" and "unlucky 13" took place in the pages of a specific literary work, a novel published in 1907 titled — what else? — Friday, the Thirteenth. The book, all but forgotten now, concerned dirty dealings in the stock market and sold quite well in its day. Both the titular phrase and the phobic premise behind it — namely that superstitious people regard Friday the 13th as a supremely unlucky day — were instantly adopted and popularized by the press.
It seems unlikely that the novelist, Thomas W. Lawson, literally invented that premise himself — he treats it within the story, in fact, as a notion that already existed in the public consciousness — but he most certainly lent it gravitas and set it on a path to becoming the most widespread superstition in modern times.
Sources and further reading (updated):
Bowen, John. "Friday the 13th." Salon magazine, 13 Aug 1999.
Brewer, E. Cobham. The Dictionary of Phrase and Fable. (1898 Edition in Hypertext).
"Days of the Week: Friday." The Mystical World Wide Web.
de Lys, Claudia. The Giant Book of Superstitions. New Jersey: Citadel Press, 1979.
Duncan, David E. Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year. New York: Avon, 1998.
Ferm, Vergilius. A Brief Dictionary of American Superstitions. New York: Philosophical Library, 1965.
Krischke, Wolfgang. "This Just Might Be Your Lucky Day." Frankfurter Allgemeine Zeitung, 1 Nov 2001.
Kurtz, Katharine. Tales of the Knights Templar. New York: Warner Books, 1995.
Lachenmeyer, Nathaniel. 13: The Story of the World's Most Popular Superstition. New York: Avalon, 2004.
Lawson, Thomas W. Friday, the Thirteenth. New York: Doubleday, 1907.
Opie, Iona and Tatem, Moira. A Dictionary of Superstitions. Oxford: Oxford University Press, 1989.
Panati, Charles. Panati's Extraordinary Origins of Everyday Things. New York: Harper Collins, 1989.
Q and A: Triskaidekaphobia. New York Times, 8 Aug 1993.
Scanlon, T.J., et al. "Is Friday the 13th Bad for Your Health?" British Medical Journal. (Dec. 18-25, 1993): 1584-6.