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Prosperity & Luck

Friday the 13th

Also called paraskevidekatriaphobia, unlucky Friday, Black Friday (old sense)

Friday the 13th is the day many people in the English-speaking world consider unluckiest. It joins two older fears, of Fridays and of the number 13, and the combined belief only shows up in print in the late 1800s, despite popular stories about the Knights Templar.

TraditionModern Anglo-American superstition
RegionUnited States and Britain, spread worldwide
EraCombined belief from the 1860s to 1900s
Moon◐ Any moon
DayFriday · Venus
Element—
Difficulty●○○ Simple
TimeOne day

Tonight's moon is read when the page loads.

The working

  1. Traditional advice is to avoid starting anything big on Friday the 13th: no new job, journey, wedding, house move or major deal.
  2. Many people keep a lucky charm in a pocket for the day, such as a horseshoe charm, rabbit's foot or four-leaf clover.
  3. If you boast about good luck, knock on wood or cross your fingers to keep it.
  4. Avoid the classic bad omens that day: walking under ladders, spilling salt, opening umbrellas indoors.
  5. To turn the day around, do the opposite on purpose, as the Thirteen Club did: share a meal with friends, plan something joyful, and note how ordinary it turns out.
  6. If the date causes real anxiety, plan a calm day and remember that studies have found no reliable rise in accidents.

Take care: Fear of the date (paraskevidekatriaphobia) can be real anxiety; if it disrupts your life, a doctor or therapist can help. No charm replaces ordinary care when driving or traveling.

Versions across time and place

i

Martes 13 (Tuesday the 13th)

Spain, Greece and Latin America · Traditional

In Spanish- and Greek-speaking countries the unlucky day is Tuesday the 13th. A Spanish saying warns not to marry or set sail on a Tuesday.

Recorded in: Friday the 13th entry, Wikipedia
ii

Venerdì 17

Italy · Traditional

Italians fear Friday the 17th instead, since the Roman numeral XVII can be rearranged to VIXI, 'I have lived', meaning I am dead. Some Italian buildings skip room 17.

Recorded in: Friday the 13th entry, Wikipedia
iii

The Thirteen Club

New York anti-superstition society · Founded 1881

Captain William Fowler started a dining club that first met on 13 September 1881, with 13 guests at a table, walking under ladders and spilling salt on purpose to mock superstition. Its records show the fear of Friday and of 13 were still separate ideas.

Recorded in: Library of Congress Folklife Today blog; Live Science

History

Fear of the number 13 and of Fridays are both old in Europe. Thirteen at a table was thought unlucky, often linked to the Last Supper, and Friday was the day of the Crucifixion and an ill day to start a journey. But the two do not appear joined until the 19th century. An early printed case is H. Sutherland Edwards' 1869 life of Gioachino Rossini, who died on Friday 13 November 1868 and is said to have regarded both the day and the number as unlucky.

In 1907 the Boston financier Thomas W. Lawson published a novel, Friday, the Thirteenth, about a broker who exploits the superstition to cause a Wall Street panic, and it helped spread the idea. The often-told link to the arrest of the Knights Templar on Friday 13 October 1307 is a modern claim with no evidence that anyone treated the date as cursed then. Horror films from 1980 onward made the day a pop-culture fixture.

Sources

  1. Origins of Friday the 13th: How the Day Got So Spooky · Live Science
  2. Who's Afraid of Friday the Thirteenth? · Library of Congress, Folklife Today, 2017
  3. Friday the 13th · Wikipedia contributors, 2026
  4. Friday, the Thirteenth · Thomas W. Lawson, 1907

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