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Friday the 13th is synonymous with regretful luck and superstitions — so much so that some people level - out refuse to vanish , make business enterprise deals or get married on this fatal day .

As many as 21 million citizenry in the United States are fearful of Friday the 13th , according to the Stress Management Center and Phobia Institute in Asheville , N.C. , which estimates that $ 800 million to $ 900 million is drop off in byplay everyFriday the 13thbecause of fears of the doomed day . [ Top 10 Phobias ]

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credit: lupy2002 | 2002

But is there really a grounds to be so worried of a Clarence Shepard Day Jr. that ’s technically just like any other ? Of of course not , scientist say . you’re able to pick out any date on the calendar or any daytime in history and find some uncanny stuff that ’s chance . For playfulness , we ’ve rounded up 13 events — some tragic , some just apparently strange — that happened on a Friday the 13th :

1.Oct . 13 , 1307 – Officers of King Philip IV of France raid the homes of theKnights Templar , who were warrior monks during the Crusades , imprisoning several thousand man on care of illegal activities . None of these care were prove , but 100 suffered agonizing torture mean to force confession , and more than a hundred died , according to " Tales of the Knights Templar " ( Warner Books , 1995 ) .

2.Aug . 13 , 1521 – Conquistador Hernán Cortés enamor Cuauhtémoc , the swayer of Tenochtitlán , claiming the city for Spain and mark the ending of the Aztec Empire . Cortés appointed himself the raw ruler and rename it Mexico City , allot to the Smithsonian National Museum of American History .

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3.Nov . 13 , 1789- Benjamin Franklin wrote “ Everything appears to promise that it will last ; but in this world nothing is certain but decease and tax , ” accord to U.S. politics document .

4.Sept . 13 , 1940 – Five German bombs hit Buckingham Palace and destroyed the Palace Chapel , as part of Hitler ’s strategic " Blitz " bombardment campaign , according to written report from U.K. newsprint The Guardian .

5.June 13 , 1952 – A Swedish military DC-3 plane carrying a crew of eight disappeared over outside piddle in the Baltic Sea . This became hump as the " Catalina affair " because one of two Catalina delivery planes send to search for the planer was attacked by Soviet forces . In 1991 , the Soviet atmosphere force admitted that it had pullulate down the DC-3 as well , concord to the BBC .

A mosaic in Pompeii and distant asteroids in the solar system.

6.July 13 , 1956 – The United States and Britain turned down Native American and Yugoslavian plea to stop atmospherical testing ofnuclear weapons , according to The New York Times .

7.Nov . 13 , 1970 – A huge South Asian storm kill an estimated 300,000 the great unwashed in Chittagong , Bangladesh , and produce flood that kill as many as 1 million in the Ganges delta .

8.June 13 , 1986 – The Olsen twins , Mary - Kate and Ashley , were born .

A painting of a Viking man on a boat wearing a horned helmet

9.Jan . 13 , 1989 – The " Friday the 13th virus " infected century of IBM computers across Great Britain , wiping out program single file and causing considerable anxiety at a time when heavy - exfoliation computer virus were a relatively new menace .

10.Oct . 13 , 1989 – The Dow Jones Industrial Average underwent the secondly largest drop it had ever experienced at that time . Nicknamed the Friday - the-13th mini - collapse , the Dow dropped190.58 points that sidereal day . Today , that driblet does n’t even make the top 10 lean of large drops .

11.March 13 , 2009 – " SAW – The Ride " premier at Thorpe Park amusement park in England , only to be temporarily keep out down due to " modest teething problems " accord to UK news reports .

Split image of an electricity mast and a dinosaur shadow behind a handbag.

12.Aug . 13 , 1999 – The Clarence Shepard Day Jr. would have been Alfred Hitchcock ’s hundredth birthday .

13.Sept . 13 , 2013 – The planned engagement of the thirteenth installment of the Friday the 13th horror film series , which roll around hockey game mask - wearing Jason Voorhees .

This clause was supply byLife ’s Little Mysteries , a baby site to LiveScience .

Woman clutching her head in anguish.

a two paneled image. On the left, the Statue of Liberty during a lunar eclipse. On the right, a mummy with a scan of the skeleton inside.

In the story told in the Gospels Jesus walks on the Sea of Galilee near Bethsaida.

The 10-inch-tall panel portrait "The Mocking of Christ" shows Jesus surrounded by a horde of unhappy men.

A newly discovered ancient mosaic may depict one of jesus� most famous miracles.

This mosaic in St. Mark Basilica in Venice, Italy, depicts the Ascension of Jesus Christ.

Cyber army of robots.

Lettering on Gospel of Judas

An image comparing the relative sizes of our solar system�s known dwarf planets, including the newly discovered 2017 OF201

a view of a tomb with scaffolding on it

an illustration showing a large disk of material around a star

A small phallic stalagmite is encircled by a 500-year-old bracelet carved from shell with Maya-like imagery

a person holds a GLP-1 injector

A man with light skin and dark hair and beard leans back in a wooden boat, rowing with oars into the sea