This year, for example, October 13 fell on Friday. And many superstitious people did their best to stay safe. But there are days on the calendar that were far more terrifying.
20 April
1587 - Queen Elizabeth I of England signs the death warrant to her cousin, Mary Stuart, Queen of Scots.
1888 - 246 people were killed by hail in Moradabad (India).
1889 - Adolf Hitler was born.
1916 - Wrigley Field opens in Chicago, a stadium where the local team cannot win a single major victory.
1920 - A tornado in Alabama and Mississippi killed 219 people.
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1999 - Massacre at Columbine High School. Eric Harris and Dylan Klebold killed 13 people and injured 24 before committing suicide.
2010 - Explosion of the Deepwater Horizon drilling rig, resulting in the death of 11 people.
2012 - car crash near Islamabad (Pakistan), 127 people died.
2013 - 193 people were killed and 11,826 were injured following the earthquake in Lushan County, China. 5 snowboarders were killed by an avalanche in Loveland Pass, Colorado.
April 24
1184 BC e. - The Greeks entered Troy using the famous horse.
1915 - More than 1.5 million Armenians were killed by the Turks.
1960 - an earthquake struck Iran, killing 500 people.
1971 Frank Merriwell's play opens and closes on the same day at the Longacre Theater in New York.
1980 - US military operation to rescue 52 hostages in Iran fails. Eight soldiers were killed in the helicopter collision.
2013 - A clothing manufacturing building collapsed in Bangladesh, killing 256 and injuring 1,000.
June 28
1748 - Riots after public execution in Amsterdam, resulting in more than 200 deaths.
1846 The saxophone is patented by Antoine Joseph Sachs. Residents of apartments will never sleep well again.
1887 - Indianapolis baseball team beat Philadelphia by an unprecedented 24-0.
1914 Archduke of Austria Franz Ferdinand and his wife Sophie are killed in Sarajevo by a Serbian nationalist. A few months later, the First World War begins.
1941 - German and Romanian soldiers killed 11,000 Jews in Chisinau.
1960 - state record for a day - 26 cm of rain fell in Dunmore (Kentucky).
1965 President Lyndon Johnson authorizes US ground combat forces to launch bombing raids in Vietnam. The last troops left the territory eight years later.
1975 - Lee Trevino, a golfer, is struck by lightning at the Western Open, Illinois.
August 15
483 BC e. - Buddha died. In Japan, this date is considered so unfortunate that young couples are not advised to marry on this day.
1040 - King Duncan I of Scotland dies in a battle with his first cousin and rival Macbeth.
1635 - The first recorded hurricane in America hits the Plymouth Colony.
1914 - Servant of the American architect Frank Lloyd Wright killed seven people in Wisconsin, on the Taliesin estate.
1950 - An earthquake in India kills 30,000 people.
2007 - An 8.0 magnitude earthquake off the Pacific coast devastated Peru. 514 people died and 1090 people were badly injured.
September 1
1482 - the Tatars sacked Kiev (Ukraine).
1689 - a tax on beards for men is introduced in Russia.
1859 solar storm affected electrical telegraph service.
1918 - The baseball season ends too early due to World War I.
1923 - A 7.9 magnitude earthquake that struck Tokyo and Yokohama killed 142,000 people.
1930 New York State Judge Joseph Crater disappeared due to a scandal and was never seen again.
1939 - World War II begins after Germany invaded Poland. More than 60 million people worldwide will subsequently be killed during this terrible period.
1942 - A US federal judge upholds the detention of Japanese Americans.
1962 - 12,000 people are killed in an earthquake in western Iran.
1983 Boeing 747 from Korea flies into Soviet airspace over Siberia and is shot down by a Soviet plane.
11 September
1649 - the siege of Drogheda (Ireland). Oliver Cromwell killed 3,000 Royalists.
1857 - Massacre in Mountain Meadows. Mormons dressed as Indians killed 120 colonists in Utah.
1881 - As a result of a series of landslides, the village of Elm in Switzerland disappeared.
1939 - British submarine "Triton" torpedoed the submarine of the same state "Oxley".
1943 - Jewish ghettos in Minsk and Lida were liquidated.
1963 - Typhoon Gloria overtook Taiwan and killed 330 people, causing $ 17.5 million in damage.
1974 Baseball fans are forced to sit out 25 halves. It was the longest running seven-hour game until the Cardinals finally beat the Mets 4-3.
1986 - The Dow Jones Industrial Average fell 86.61 points in 1 day.
2001 - Terrorists hijack and send passenger planes to the World Trade Center towers in New York and the Pentagon. Another plane crashed in Pennsylvania after passengers tried to take control of the hijackers. Almost 3,000 people died.
2012 - The US Consulate in Benghazi, Libya, was stormed, looted and burned, killing five people, including the US ambassador.
2015 - A large crane falls in Saudi Arabia, killing over 100 people.
29th of October
1913 Floods kill thousands of people in El Salvador.
1929 - Black Tuesday kicks off the Great Depression.
1942 - Nazis murdered 16,000 Jews in Pinsk (Soviet Union).
1945 - The first ballpoint pen goes on sale. It was patented 57 years earlier.
1960 - An aircraft carrying the Cala, Arkansas football team crashes, killing 16.
1998 - Hurricane Mitch, the second deadliest hurricane in Atlantic history (more than 11,000 deaths), reaches the coast of Honduras.
1999 - The deadliest tropical cyclone in the Indian Ocean covers Orissa, India, killing 15,000 people.
2011 - A record snowstorm in the northeastern United States left nearly 2 million residents helpless for more than 36 hours.
2012 - Hurricane Sandy hits the shores of New Jersey, killing 110 people, causing $ 50 billion in damage.
7 december
43 BC e. - Mark Tullius Cicero, Roman orator and politician, is dead.
1941 - The Imperial Japanese Navy attacks the US Navy at the Pearl Harbor Naval Base, Hawaii, killing 2,403. The next day, the United States entered World War II.
1946 - A fire at the Winecoff Hotel in Atlanta kills 119 people.
1983 - Two planes collided at Madrid airport, killing 93 people.
1988 - an earthquake of 6.9 points in Armenia took the lives of 25,000 people, 5 million people were left homeless.
1993 - Long Island Railroad Massacre. Passenger Colin Ferguson killed six people and injured 19 people on a commuter train in Nassau County, New York.
Victoria Ivashura