A day on the globeROENES中文
The Earth on 24 September, with the rays of the day’s events
  1. A birthday on the globe

    24 September on the globe: what happened in the world on this day, and who was born

    For 24 September, the English Wikipedia lists 50 events and 238 births. 22 of the events stand at their places as rays of light; six more are dashed circles, where the sentence links only to a country or a sea. The taller the ray, the longer ago it happened. The people born that day come further down, as blue points.

    A birthday, yours or someone else’s:

  2. The Earth on 24 September

    The picture on the globe was assembled by NASA from satellite photographs taken in September 2004: the snow, the ice and the green are those of the month.

    On 24 September the Sun passes straight overhead at noon along the parallel of 0.4° south. In London, the day lasts about 12 hours 5 minutes.

    The line between day and night is tilted on the globe exactly as on this day of the year. On the dark side you can see the lights of towns.

  3. 24 September

    Britain and Ireland#

    Two events from the day’s list are placed here, between 1645 and 1954.

    The globe stops at one of them; the whole list is further down. Both

  4. Britain & Ireland · London

    1954

    AEC Routemaster, the iconic London bus was introduced.

    On the map: London.

    Wikipedia: AEC Routemaster

  5. 24 September

    Europe#

    Four events from the day’s list are placed here, between 1875 and 1959.

    The globe stops at one of them; the whole list is further down. All four

  6. Europe · Oulu

    1875

    The 1864 play Heath Cobblers by Aleksis Kivi premieres in Oulu, Finland.

    On the map: Oulu.

    Wikipedia: Heath Cobblers

  7. 24 September

    Asia#

    Six events from the day’s list are placed here, between 787 and 2015.

    The globe stops at one of them; the whole list is further down. All six

  8. Asia · Nicaea

    787

    The Second Council of Nicaea begins at the Church of Holy Wisdom in the city of Nicaea in Bithynia.

    On the map: Nicaea.

    Wikipedia: Second Council of Nicaea

  9. 24 September

    North America#

    10 events from the day’s list are placed here, between 1869 and 2009.

    The globe stops at three of them; the whole list is further down. All 10

  10. North America · Devils Tower

    1906

    U.S. President Theodore Roosevelt proclaims Devils Tower in Wyoming as the nation's first National Monument.

    On the map: Devils Tower.

    Also on the day’s list of Wikipedia in Romanian.

    Wikipedia: Devils Tower

  11. North America · New York City

    1996

    Representatives of 71 nations sign the Comprehensive Nuclear-Test-Ban Treaty at the United Nations.

    On the map: New York City.

    Also on the day’s list of Wikipedia in Chinese.

    Wikipedia: Comprehensive Nuclear-Test-Ban Treaty

  12. North America · Pittsburgh

    2009

    The G20 summit begins in Pittsburgh with 30 global leaders in attendance.

    On the map: Pittsburgh.

    Wikipedia: 2009 G20 Pittsburgh summit

  13. 24 September

    What the other Wikipedias remember#

    For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Spanish and were translated for this page.

  14. From Wikipedia in Spanish · Seoul Olympic Main Stadium

    1988

    At the Seoul Olympic Games, the Canadian Ben Johnson wins the 100 metres, setting a world record (9.79 s).

    On the map: Seoul Olympic Main Stadium.

    Translated from the list on Wikipedia in Spanish.

    The article on Wikipedia in Spanish: Juegos Olímpicos de Seúl 1988

  15. 24 September

    Born on 24 September#

    The English Wikipedia lists 238 births for this day. The blue points are the birthplaces of 60 of these people: those written about in the most Wikipedia editions, where Wikidata gives a place of birth.

  16. Born on 24 September

    1896

    F. Scott Fitzgerald, American novelist and short story writer (died 1940)

    Place of birth: Saint Paul.

    Wikipedia: F. Scott Fitzgerald

  17. Born on 24 September

    1501

    Gerolamo Cardano, Italian mathematician, physician, and astrologer (died 1576)

    Place of birth: Pavia.

    Wikipedia: Gerolamo Cardano

  18. Born on 24 September

    1905

    Severo Ochoa, Spanish–American physician and biochemist, Nobel Prize laureate (died 1993)

    Place of birth: Ḷḷuarca.

    Wikipedia: Severo Ochoa

  19. Born on 24 September

    1936

    Jim Henson, American puppeteer, director, producer, and screenwriter, created The Muppets (died 1990)

    Place of birth: Greenville.

    Wikipedia: Jim Henson

  20. Born on 24 September

    1980

    John Arne Riise, Norwegian footballer

    Place of birth: Molde Municipality.

    Wikipedia: John Arne Riise

  21. Born in Britain and Ireland

    1962

    Ally McCoist, Scottish footballer and manager

    Place of birth: Bellshill.

    Wikipedia: Ally McCoist

  22. Born in Britain and Ireland

    1564

    William Adams, English sailor and navigator (died 1620)

    Place of birth: Gillingham.

    Wikipedia: William Adams

  23. Born in Britain and Ireland

    1997

    Tosin Adarabioyo, English footballer

    Place of birth: Paddington.

    Wikipedia: Tosin Adarabioyo

  24. The whole globe of the day

    Drag the globe to turn it. Touch a ray or a point to read what happened there.

Everything Wikipedia lists for 24 September

The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 22 events have no place on the map: the sentence links to no place with coordinates, only to places too wide to mark, or to several countries.

  1. 787

    The Second Council of Nicaea begins at the Church of Holy Wisdom in the city of Nicaea in Bithynia.

    Asia · NicaeaWikipedia: Second Council of Nicaea
  2. 867

    Byzantine emperor Michael III is murdered in his chamber by his junior emperor Basil I.

    no place on the mapWikipedia: Michael III
  3. 1568

    Spanish naval forces defeat an English fleet, under the command of John Hawkins, at the Battle of San Juan de Ulúa near Veracruz.

    Latin America · Battle of San Juan de UlúaWikipedia: Battle of San Juan de Ulúa
  4. 1645

    The Battle of Rowton Heath in England occurs, ending in a Parliamentarian victory over a Royalist army commanded in person by King Charles I.

    Britain & Ireland · Battle of Rowton HeathWikipedia: Battle of Rowton Heath
  5. 1674

    Second Tantrik Coronation of Shivaji.

    no place on the mapWikipedia: Shivaji
  6. 1789

    The United States Congress passes the Judiciary Act, creating the office of the Attorney General and federal judiciary system and ordering the composition of the Supreme Court.

  7. 1830

    A revolutionary committee of notables forms the Provisional Government of Belgium.

  8. 1841

    The Sultanate of Brunei cedes Sarawak to James Brooke.

    Asia · Raj of SarawakWikipedia: Sultanate of Brunei
  9. 1846

    Mexican–American War: General Zachary Taylor captures Monterrey.

    Latin America · Battle of MonterreyWikipedia: Mexican–American War
  10. 1852

    The first powered, passenger-carrying airship, the Giffard dirigible, travels 17 miles (27 km) from Paris to Trappes.

    no place on the mapWikipedia: Giffard dirigible
  11. 1853

    Admiral Despointes formally takes possession of New Caledonia in the name of France.

    Oceania · New CaledoniaWikipedia: Auguste Febvrier Despointes
  12. 1869

    Black Friday (1869): Gold prices plummet after United States President Ulysses S. Grant orders the Treasury to sell large quantities of gold after Jay Gould and James Fisk plot to control the market.

    North America · New York Gold ExchangeWikipedia: Black Friday
  13. 1875

    The 1864 play Heath Cobblers by Aleksis Kivi premieres in Oulu, Finland.

    Europe · OuluWikipedia: Heath Cobblers
  14. 1877

    The Battle of Shiroyama is a decisive victory of the Imperial Japanese Army over the Satsuma Rebellion.

    Asia · Battle of ShiroyamaWikipedia: Battle of Shiroyama
  15. 1890

    The Church of Jesus Christ of Latter-day Saints officially renounces polygamy.

    no place on the mapWikipedia: 1890 Manifesto
  16. 1903

    Alfred Deakin became the second Australian prime minister, succeeding Edmund Barton, who left office to become a founding justice of the High Court of Australia.

    no place on the mapWikipedia: Alfred Deakin
  17. 1906

    Racial tensions exacerbated by rumors lead to the Atlanta Race Riot, further increasing racial segregation.

    North America · 1906 Atlanta race massacreWikipedia: 1906 Atlanta race massacre
  18. 1906

    U.S. President Theodore Roosevelt proclaims Devils Tower in Wyoming as the nation's first National Monument.

    North America · Devils TowerWikipedia: Devils Tower
  19. 1911

    His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.

    no place on the mapWikipedia: HMA No. 1
  20. 1929

    Jimmy Doolittle performs the first flight without a window, proving that full instrument flying from take off to landing is possible.

    no place on the mapWikipedia: Jimmy Doolittle
  21. 1932

    Mahatma Gandhi and B. R. Ambedkar agree to the Poona Pact, which reserved seats in the Indian provincial legislatures for the "Depressed Classes" (Untouchables).

    no place on the mapWikipedia: Mahatma Gandhi
  22. 1935

    Earl and Weldon Bascom produce the first rodeo ever held outdoors under electric lights.

    no place on the mapWikipedia: Earl W. Bascom
  23. 1941

    Operation Barbarossa: A Wehrmacht training event known as the Mogilev Conference began, marking an increase in violence against Jews and other civilians in the areas under General Max von Schenckendorff's command.

    Europe · Mogilev ConferenceWikipedia: Mogilev Conference
  24. 1945

    Dozens of Jews were injured in the Topoľčany pogrom, one of the worst episodes of anti-Jewish violence in postwar Czechoslovakia.

    Europe · TopoľčanyWikipedia: Topoľčany pogrom
  25. 1946

    Cathay Pacific Airways is founded in Hong Kong.

    no place on the mapWikipedia: Cathay Pacific
  26. 1946

    The top-secret Clifford-Elsey Report on the Soviet Union is delivered to President Truman.

    no place on the mapWikipedia: X Article
  27. 1948

    The Honda Motor Company is founded.

    no place on the mapWikipedia: Honda
  28. 1950

    The eastern United States is covered by a thick haze from the Chinchaga fire in western Canada.

    North America · Chinchaga fireWikipedia: Chinchaga fire
  29. 1954

    AEC Routemaster, the iconic London bus was introduced.

    Britain & Ireland · LondonWikipedia: AEC Routemaster
  30. 1954

    The Cochabamba–Santa Cruz highway connecting western and eastern Bolivia is inaugurated.

    Latin America · BoliviaWikipedia: Route 7
  31. 1957

    President Eisenhower sends the 101st Airborne Division to Little Rock, Arkansas, to enforce desegregation.

    North America · Little Rock NineWikipedia: 101st Airborne Division
  32. 1959

    TAI Flight 307 crashes during takeoff from Bordeaux–Mérignac Airport in Bordeaux, Nouvelle-Aquitaine, France, killing 55 people.

    Europe · TAI Flight 307Wikipedia: TAI Flight 307
  33. 1960

    USS Enterprise, the world's first nuclear-powered aircraft carrier, is launched.

    no place on the mapWikipedia: USS Enterprise
  34. 1964

    The Warren Commission released its report to the U.S. president, concluding that Lee Harvey Oswald acted alone in the assassination of John F. Kennedy.

    North America · Assassination of John F. KennedyWikipedia: Assassination of John F. Kennedy
  35. 1972

    Japan Airlines Flight 472 lands at Juhu Aerodrome instead of Santacruz Airport in Bombay, India, overrunning the runway and resulting in 11 injuries.

    Asia · Japan Air Lines Flight 472Wikipedia: Japan Air Lines Flight 472
  36. 1973

    Guinea-Bissau declares its independence from Portugal.

    Africa · Guinea-BissauWikipedia: Guinea-Bissau
  37. 1975

    Southwest Face expedition members become the first persons to reach the summit of Mount Everest by any of its faces, instead of using a ridge route.

  38. 1992

    After his neighbor identified handwriting samples placed on local billboards by police, Oba Chandler was arrested three years after he committed a triple murder in the Tampa Bay area in Florida.

    North America · Tampa Bay areaWikipedia: Oba Chandler
  39. 1993

    The Cambodian monarchy is restored, with Norodom Sihanouk as king.

  40. 1996

    Representatives of 71 nations sign the Comprehensive Nuclear-Test-Ban Treaty at the United Nations.

    North America · New York CityWikipedia: Comprehensive Nuclear-Test-Ban Treaty
  41. 2005

    Hurricane Rita makes landfall in the United States, devastating portions of southwestern Louisiana and extreme southeastern Texas.

    North America · TexasWikipedia: Hurricane Rita
  42. 2007

    Between 30,000 and 100,000 people take part in anti-government protests in Yangon, Burma, the largest in 20 years.

  43. 2008

    Thabo Mbeki resigns as president of South Africa.

    no place on the mapWikipedia: Thabo Mbeki
  44. 2009

    South African Airlink Flight 8911 crashes near Durban International Airport in Durban, South Africa, killing the captain and injuring the rest of the crew.

    Africa · South African Airlink Flight 8911Wikipedia: South African Airlink Flight 8911
  45. 2009

    The G20 summit begins in Pittsburgh with 30 global leaders in attendance.

    North America · PittsburghWikipedia: 2009 G20 Pittsburgh summit
  46. 2013

    A 7.7-magnitude earthquake strikes southern Pakistan, killing at least 327 people.

    Asia · 2013 Balochistan earthquakesWikipedia: 2013 Balochistan earthquakes
  47. 2014

    The Mars Orbiter Mission makes India the first Asian nation to reach Mars orbit, and the first nation in the world to do so in its first attempt.

  48. 2015

    At least 1,100 people are killed and another 934 wounded after a stampede during the Hajj in Saudi Arabia.

    Asia · 2015 Mina crowd crushWikipedia: 2015 Mina crowd crush
  49. 2019

    The Supreme Court of the United Kingdom unanimously ruled that advice given by Prime Minister Boris Johnson to Queen Elizabeth II that Parliament should be prorogued was unlawful.

  50. 2023

    NASA's OSIRIS-REx capsule containing samples from the asteroid 101955 Bennu successfully lands back on Earth.

    no place on the mapWikipedia: NASA

What the other Wikipedias remember

For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Spanish and were translated for this page.

  1. 1988

    At the Seoul Olympic Games, the Canadian Ben Johnson wins the 100 metres, setting a world record (9.79 s).

    Asia · Seoul Olympic Main StadiumTranslated from the list on Wikipedia in SpanishWikipedia: Juegos Olímpicos de Seúl 1988

Who was born on 24 September

In order of how many Wikipedia editions have an article about each. The first 60 of 238 are shown.

  1. 1896

    F. Scott Fitzgerald, American novelist and short story writer (died 1940)

    Saint PaulWikipedia: F. Scott Fitzgerald
  2. 1911

    Konstantin Chernenko, Soviet politician, General Secretary of the Communist Party and de facto leader of the USSR (died 1985)

    Bolshaya TesWikipedia: Konstantin Chernenko
  3. 1884

    İsmet İnönü, Turkish general and politician, 2nd President of Turkey (died 1973)

    İnönü House MuseumWikipedia: İsmet İnönü
  4. 15

    Vitellius, Roman emperor (died 69)

    NuceriaWikipedia: Vitellius
  5. 1501

    Gerolamo Cardano, Italian mathematician, physician, and astrologer (died 1576)

    PaviaWikipedia: Gerolamo Cardano
  6. 1717

    Horace Walpole, English historian, author, and politician (died 1797)

    LondonWikipedia: Horace Walpole
  7. 1898

    Howard Florey, Australian pharmacologist and pathologist, Nobel Prize laureate (died 1968)

    AdelaideWikipedia: Howard Florey
  8. 1905

    Severo Ochoa, Spanish–American physician and biochemist, Nobel Prize laureate (died 1993)

    ḶḷuarcaWikipedia: Severo Ochoa
  9. 1936

    Jim Henson, American puppeteer, director, producer, and screenwriter, created The Muppets (died 1990)

    GreenvilleWikipedia: Jim Henson
  10. 1980

    John Arne Riise, Norwegian footballer

    Molde MunicipalityWikipedia: John Arne Riise
  11. 1930

    John W. Young, American captain, engineer, and astronaut (died 2018)

    San FranciscoWikipedia: John Young
  12. 1895

    André Frédéric Cournand, French physician and physiologist, Nobel Prize laureate (died 1988)

    1st arrondissement of ParisWikipedia: André Frédéric Cournand
  13. 1583

    Albrecht von Wallenstein, Bohemian general (died 1634)

    HeřmaniceWikipedia: Albrecht von Wallenstein
  14. 1755

    John Marshall, American Continental Army officer, jurist, and politician, 4th Chief Justice of the United States Supreme Court (died 1835)

    GermantownWikipedia: John Marshall
  15. 1878

    Charles-Ferdinand Ramuz, Swiss author and poet (died 1947)

    LausanneWikipedia: Charles Ferdinand Ramuz
  16. 1801

    Mikhail Ostrogradsky, Ukrainian-Russian mathematician and physicist (died 1862)

    PashenivkaWikipedia: Mikhail Ostrogradsky
  17. 1941

    Linda McCartney, American singer, photographer, and activist (died 1998)

    ManhattanWikipedia: Linda McCartney
  18. 1954

    Marco Tardelli, Italian footballer and coach

    CareggineWikipedia: Marco Tardelli
  19. 1991

    Oriol Romeu, Spanish footballer

    UlldeconaWikipedia: Oriol Romeu
  20. 1976

    Stephanie McMahon, American wrestler and businesswoman

    HartfordWikipedia: Stephanie McMahon
  21. 1954

    Ashton B. Carter, American military civilian official (Secretary of Defense, 2015-17), and academic administrator

    PhiladelphiaWikipedia: Ash Carter
  22. 1625

    Johan de Witt, Dutch mathematician and politician (died 1672)

    DordrechtWikipedia: Johan de Witt
  23. 1958

    Kevin Sorbo, American actor and producer

    MoundWikipedia: Kevin Sorbo
  24. 1948

    Phil Hartman, Canadian-American actor and screenwriter (died 1998)

    BrantfordWikipedia: Phil Hartman
  25. 1962

    Ally McCoist, Scottish footballer and manager

    BellshillWikipedia: Ally McCoist
  26. 1979

    Fábio Aurélio, Brazilian footballer

    São CarlosWikipedia: Fábio Aurélio
  27. 1534

    Guru Ram Das, fourth Sikh Guru (died 1581)

    LahoreWikipedia: Guru Ram Das
  28. 1962

    Nia Vardalos, Canadian-American actress and screenwriter

    WinnipegWikipedia: Nia Vardalos
  29. 1564

    William Adams, English sailor and navigator (died 1620)

    GillinghamWikipedia: William Adams
  30. 1949

    Anders Arborelius, Swedish cardinal

    SorengoWikipedia: Anders Arborelius
  31. 1989

    Pia Wurtzbach, Filipina actress, model, and beauty queen, Miss Universe 2015

    StuttgartWikipedia: Pia Wurtzbach
  32. 1880

    Sarah Knauss, American super-centenarian, oldest verified American person ever (died 1999)

    HollywoodWikipedia: Sarah Knauss
  33. 1997

    Tosin Adarabioyo, English footballer

    PaddingtonWikipedia: Tosin Adarabioyo
  34. 1934

    Manfred Wörner, German politician and diplomat, 7th Secretary General of NATO (died 1994)

    Bad CannstattWikipedia: Manfred Wörner
  35. 1969

    Shawn Crahan, American drummer, songwriter, and producer

    Des MoinesWikipedia: Shawn Crahan
  36. 1985

    Jonathan Soriano, Spanish footballer

    El Pont de Vilomara i RocafortWikipedia: Jonathan Soriano
  37. 1993

    Ben Platt, American actor, singer, and songwriter

    Los AngelesWikipedia: Ben Platt
  38. 2003

    Joe Locke, Manx actor

    DouglasWikipedia: Joe Locke
  39. 1920

    Ovadia Yosef, Iraqi-Israeli rabbi and scholar (died 2013)

    BaghdadWikipedia: Ovadia Yosef
  40. 1934

    John Brunner, English-Scottish author and screenwriter (died 1995)

    WallingfordWikipedia: John Brunner
  41. 1980

    Petri Pasanen, Finnish footballer

    LahtiWikipedia: Petri Pasanen
  42. 1871

    Lottie Dod, English tennis player, golfer, and archer (died 1960)

    BebingtonWikipedia: Lottie Dod
  43. 1872

    Jaan Teemant, Estonian lawyer and politician, 7th State Elder of Estonia (died 1941)

    Vigala Rural MunicipalityWikipedia: Jaan Teemant
  44. 1993

    Liu Shiying, Chinese athlete

    YantaiWikipedia: Liu Shiying
  45. 1705

    Count Leopold Joseph von Daun, Austrian field marshal (died 1766)

    ViennaWikipedia: Leopold Joseph von Daun
  46. 1725

    Arthur Guinness, Irish brewer and founder of the Guinness brewery (died 1803)

    CelbridgeWikipedia: Arthur Guinness
  47. 1976

    Ian Bohen, American actor

    Carmel-by-the-SeaWikipedia: Ian Bohen
  48. 1473

    Georg von Frundsberg, German Knight and landowner (died 1528)

    MindelheimWikipedia: Georg von Frundsberg
  49. 1796

    Antoine-Louis Barye, French sculptor and educator (died 1875)

    ParisWikipedia: Antoine-Louis Barye
  50. 1817

    Ramón de Campoamor y Campoosorio, Spanish poet and philosopher (died 1901)

  51. 1884

    Gustave Garrigou, French cyclist (died 1963)

    Vabre-TizacWikipedia: Gustave Garrigou
  52. 1914

    Andrzej Panufnik, Polish pianist, composer, and conductor (died 1991)

    WarsawWikipedia: Andrzej Panufnik
  53. 1946

    Lars Emil Johansen, Greenlandic educator and politician, 2nd Prime Minister of Greenland

    IllorsuitWikipedia: Lars-Emil Johansen
  54. 1980

    Victoria Pendleton, English cyclist

    StotfoldWikipedia: Victoria Pendleton
  55. 936

    'Adud al-Dawla, Buyid king (died 983)

    IsfahanWikipedia: 'Adud al-Dawla
  56. 1923

    Raoul Bott, Hungarian-American mathematician (died 2005)

    BudapestWikipedia: Raoul Bott
  57. 1950

    Harriet Walter, English actress

    LondonWikipedia: Harriet Walter
  58. 1870

    Georges Claude, French chemist and engineer, invented Neon lighting (died 1960)

    11th arrondissement of ParisWikipedia: Georges Claude
  59. 1893

    Blind Lemon Jefferson, American singer-songwriter and guitarist (died 1929)

    WorthamWikipedia: Blind Lemon Jefferson
  60. 1882

    Max Decugis, French tennis player (died 1978)

    ParisWikipedia: Max Decugis

What is celebrated on 24 September

  • Armed Forces Day (Peru)
  • Christian feast day: Anathalon (in Brescia)
  • Christian feast day: Antonio Gonzalez
  • Christian feast day: Blessed Anton Martin Slomšek
  • Christian feast day: Bystrík
  • Christian feast day: Blessed Colomba Gabriel
  • Christian feast day: Blessed Émilie Gamelin (Canada)
  • Christian feast day: Gerard of Csanád
  • Christian feast day: Our Lady of Mercy and its related observance: La Mercè (Barcelona)
  • Christian feast day: Our Lady of Ransom (Mercedarians)
  • Christian feast day: Our Lady of Walsingham (Church of England)
  • Christian feast day: Pacificus of San Severino
  • Christian feast day: Rupert of Salzburg
  • Christian feast day: Blessed William Spenser

A greeting link for someone

Type a name and, if you like, the year of birth. The link opens with a greeting, and beside each event it says how old the person turned that day, or how many years before their birth it happened.

The name and the year go only into the link you send.

Download the day’s picture

All 366 days

How the globe is made

Where the events come from

Each edition of this page uses the day’s list from Wikipedia in its own language: Romanian, English, Spanish, Chinese. The lists are written by volunteers and differ from one edition to the next; the text of each event is Wikipedia’s, with a link to the article. A row that appears twice in a list is shown once. The lists have not been checked event by event: they are Wikipedia’s, mistakes included.

For events before 1582, and for countries that moved to the Gregorian calendar later (Britain in 1752, Russia in 1918), the same day may be counted Old Style in one list and New Style in another.

The chapter “What the other Wikipedias remember” adds up to five events a day from the lists of the other three editions, only for years in which the English list has nothing on that day. They were translated for this page, passed the same filters as the tour, and are not counted among the events of the English list.

How an event gets onto the map

The place comes from Wikidata. If the sentence links to the article about the event itself (a battle, an opening, an earthquake), dated to the same year, the ray stands on its coordinates or on those of its location. Otherwise it stands on the first place the sentence links to: a town, a building, a mountain, an island. This second step can be wrong: sometimes the sentence only mentions the place. That is why the page says, under each event, which place the ray stands on.

When the sentence links to a single state or province, or to a single sea, lake or desert larger than 5,000 km², the globe shows a dashed circle, not a ray. The circle has the area Wikidata gives, with its radius kept between 1.2° and 16°, or a radius of 4.5° when Wikidata gives no area; it says only that the sentence links to that place. Organisations, ships, spacecraft, museum objects, rivers, mountain ranges, languages and continents are never used as places. When a sentence names several states and no exact place, the event stays in the list only.

What the height means

The height of a ray shows how many years have passed, on a logarithmic scale: 10 years, 100 years and 1,000 years are equal steps apart; anything older than about 2,600 years has the tallest ray. The colour runs from pale yellow for recent years to violet for antiquity.

Where the tour stops

In each region the tour stops at up to three events (five in Britain and Ireland), chosen mainly by three things: whether Wikipedia’s editors put the event in the “On this day” box of their main page (the English, Spanish and Chinese editions), how many Wikipedia editions have an article about it, and how many of the four lists include it. Events whose sentence or article is about a war, an attack, a crime or a disaster are left out of the tour; they stay in the whole list, in Wikipedia’s wording. The filter is a list of words and a list of Wikidata types, so it can miss some.

The tour of births names the people with articles in the most editions and leaves aside those whom the list or Wikidata describes as rulers, politicians, commanders, leaders of movements or criminals; they stay in the list.

The Earth and the Sun

The daytime images are NASA’s Blue Marble Next Generation mosaics, one for each month of 2004; the night side is Black Marble 2016. The tilt of the line between day and night is computed for the day; the hour is chosen so that the place being read is in daylight. The latitude where the Sun stands overhead is the average of the four years of the leap cycle; in a given year it can differ by up to 0.4°.

The day you were born

The number ones come from the weekly lists on Wikipedia: Billboard for the United States (from 1940; the Hot 100 from August 1958), the UK Singles Chart (from November 1952), Los 40 Principales for Spain (from July 1966) and, for Romania, the Romanian Top 100 and Airplay 100 (2001–2021, with missing weeks). The page shows the chart of the week in which the day of birth falls, with its date; Billboard and the UK chart are dated at the end of their week. For Romania before 2001 and for China these sources have no weekly chart.

The films are those that reached cinemas in the United States up to ten days before or three days after that day (some of them in a few cinemas at first), from the English Wikipedia’s yearly lists (from 1968), in order of how many editions have an article about them. The events “in those days” are the ones on the neighbouring days’ lists that carry the year of birth, passed through the same filter as the tour.

The day of birth, year included

The Moon, the star sign and the constellation are worked out by the page itself, for noon Universal Time on the day. The lit part of the Moon is rounded and can differ by a few per cent from that at the hour of birth. The sign follows the usual zodiac of twelve equal parts starting at the March equinox; the constellation is the one the Sun actually stood in front of, by the borders set by the International Astronomical Union, and within a day of a border the page does not name it. When the Sun changes sign while it is that day anywhere on Earth, the page gives the moment of crossing, rounded to ten minutes and accurate to within about a quarter of an hour, and the clock time in a few cities, with the time zone and summer time of that year.

The year in the Chinese calendar is the one your device’s own calendar gives for the date, checked against the Hong Kong Observatory’s tables. “All your birthdays” uses the same sources as the rest of the chapter for the same day in every year since the birth: the temperature, well-known launches that took place on that very day, matches of the teams the edition follows, snow deeper than 10 cm and strong geomagnetic storms. The three things at the top and the four on the picture are chosen in a fixed order (the song, the animal, a full Moon, a well-known launch before an ordinary earthquake); on the picture you can change them.

When the link carries a year of birth, the page adds a few things about that exact day. The weather is the Met Office’s Central England temperature record and the readings from New York’s Central Park; the “usual high” is the average of the daily highs of 1961–1990 for that date, with two days either side. The carbon dioxide figure is the monthly mean at the Mauna Loa observatory, where measurements begin in March 1958.

The earthquake is the one with the largest magnitude in the USGS catalogue for that day, counted in Universal Time. Before the 1960s the catalogue has gaps even above magnitude 5.5, so in the older years many days have no earthquake. The page gives only the magnitude and the place: the country the epicentre falls in or, when the epicentre is at sea within 300 km of a coast, the nearest country; farther out, only the ocean.

The launches are those that reached orbit or left for the Moon and the planets, from Jonathan McDowell’s GCAT catalogue. If nothing left that day, the page shows the nearest launch within three days before or after, and says how many days away it was. The geomagnetic storm appears only when the Kp index reached at least 5 in one of the day’s eight three-hour intervals.

The animal comes from GBIF: an observation made by a person (the animal seen or heard, or its tracks), dated to that exact day, with coordinates and a CC0 or CC BY licence. Only a few hundred well-known species are searched (mammals, birds, turtles, butterflies); of those noted that day, mammals and species with articles in many Wikipedia editions come first; birds noted almost every day, and species used recently, wait their turn. Observations dated 1 January are left out, because records without a day are often filed there. An observation shows that the animal was recorded there, not how many animals there were.

The matches are those between national teams. Only matches of England, Scotland, Wales, Northern Ireland, the Republic of Ireland, the United States, Canada and Australia are shown, along with those at the big final tournaments. The picture to send is drawn in the page from the day’s globe and the facts above, and stays on your device until you send it.

Sources

More pages about birthdays