Folklore and Superstition covers the topics of good luck, bad luck and uncommon wisdom. Discover more about topics like conspiracy theories, urban legends or voodoo.

Why is it considered unlucky when the thirteenth day in a month falls on a Friday?

We have all heard that anytime the thirteenth day of the month falls on a Friday that it is considered an unlucky day. Where did this notion come from? Find out the answer to that question in this article.

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  • How Conspiracy Theories Work

    How Conspiracy Theories Work

    Conspiracy theories are often ridiculous explanations for a disputed case or matter. There are conspiracy theories about everything from aliens to the September 11, 2001 terrorist attacks on America. Find out how these theories get started in this article. See more »

  • How Friday the 13th Works

    How Friday the 13th Works

    Like many human beliefs, the fear of Friday the 13th (known as paraskevidekatriaphobia) isn't exactly grounded in scientific logic. But that doesn't stop us from feeling that it's "unlucky." See more »

  • How Murphy's Law Works

    How Murphy's Law Works

    The idiom says whatever can go wrong will go wrong. Is it the mysterious power of Murphy's Law, or is it simply people who give the law relevance? See more »

  • How Shrunken Heads Work

    How Shrunken Heads Work

    Visitors to remote jungles face several potential dangers. Disease, ferocious animals, deadly plant life, the risk of having your head shrunken … wait, what? See more »

  • How the Mayan Calendar Works

    How the Mayan Calendar Works

    The Mayans created a sophisticated set of calendars to help them plant crops, plan religious ceremonies and keep their history. How did they do it? See more »

  • How Urban Legends Work

    How Urban Legends Work

    OK, so a good friend of mine was driving down the highway and he picked up this hitchhiker… Urban legends are the basis for some truly spooky ghost stories. See how the tales get started and how they make their way to you. See more »

  • Truth or Tin Foil? A Conspiracy Quiz

    Truth or Tin Foil? A Conspiracy Quiz

    Take our conspiracy quiz to see how much you know about some of history's most mind-blowing examples of trickery, schemes and subterfuge. See more »

  • Why are fishermen superstitious of bananas?

    Why are fishermen superstitious of bananas?

    Before you board the crab boat for your first fishing gig, the captain tells you to ditch the suitcase and the banana. This is deadly work. Are you really going to argue with superstition? See more »

  • 10 Famous Curses

    10 Famous Curses

    Everybody has bad days, but Fortune seems to have it in for some people. You decide: Are these 10 infamous cases of bad luck coincidences or curses? See more »

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