A day on the globeROENES中文
The Earth on 11 January, with the rays of the day’s events
  1. A birthday on the globe

    11 January on the globe: what happened in the world on this day, and who was born

    For 11 January, the English Wikipedia lists 52 events and 229 births. 29 of the events stand at their places as rays of light; 10 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 11 January

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

    On 11 January the Sun passes straight overhead at noon along the parallel of 21.9° south. In London, the day lasts about 8 hours 10 minutes.

    Beyond 68° south the Sun no longer sets; beyond 68° north it no longer rises.

    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. 11 January

    Africa#

    Three events from the day’s list are placed here, between 1957 and 2013.

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

  4. Africa · Dakar

    1957

    The African Convention is founded in Dakar, Senegal.

    On the map: Dakar.

    Wikipedia: African Convention

  5. 11 January

    Asia#

    10 events from the day’s list are placed here, between 532 and 2024.

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

  6. Asia · Tbilisi Metro

    1966

    The Tbilisi Metro is opened.

    On the map: Tbilisi Metro.

    Wikipedia: Tbilisi Metro

  7. 11 January

    North America#

    17 events from the day’s list are placed here, between 1759 and 2003.

    The globe stops at three of them; the whole list is further down. All 17

  8. North America · Philadelphia

    1759

    The first American life insurance company, the Corporation for Relief of Poor and Distressed Presbyterian Ministers and of the Poor and Distressed Widows and Children of the Presbyterian Ministers (now part of Unum Group), is incorporated in Philadelphia, Pennsylvania.

    On the map: Philadelphia.

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

    Wikipedia: Life insurance

  9. North America · Los Angeles

    1927

    Louis B. Mayer, head of film studio Metro-Goldwyn-Mayer (MGM), announces the creation of the Academy of Motion Picture Arts and Sciences, at a banquet in Los Angeles, California.

    On the map: Los Angeles.

    Wikipedia: Louis B. Mayer

  10. North America · New York City

    1961

    Throgs Neck Bridge over the East River, linking New York City's boroughs of The Bronx and Queens, opens to road traffic.

    On the map: New York City.

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

    Wikipedia: Throgs Neck Bridge

  11. 11 January

    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.

  12. From Wikipedia in Spanish · Mexico City

    1967

    In Mexico City, the last snowfall in its history occurs.

    On the map: Mexico City.

    Translated from the list on Wikipedia in Spanish.

    The article on Wikipedia in Spanish: Ciudad de México

  13. 11 January

    Born on 11 January#

    The English Wikipedia lists 229 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.

  14. Born on 11 January

    1842

    William James, American psychologist and philosopher (died 1910)

    Place of birth: Astor House.

    Wikipedia: William James

  15. Born on 11 January

    1954

    Kailash Satyarthi, Indian engineer, academic, and activist, Nobel Prize laureate

    Place of birth: Vidisha.

    Wikipedia: Kailash Satyarthi

  16. Born on 11 January

    1906

    Albert Hofmann, Swiss chemist and academic, discoverer of LSD (died 2008)

    Place of birth: Baden.

    Wikipedia: Albert Hofmann

  17. Born on 11 January

    1979

    Siti Nurhaliza, Malaysian singer-songwriter and businesswoman

    Place of birth: Kampung Awah.

    Wikipedia: Siti Nurhaliza

  18. Born on 11 January

    1992

    Dani Carvajal, Spanish footballer

    Place of birth: Leganés.

    Wikipedia: Dani Carvajal

  19. Born in Britain and Ireland

    1987

    Jamie Vardy, English footballer

    Place of birth: Sheffield.

    Wikipedia: Jamie Vardy

  20. Born in Britain and Ireland

    1978

    Emile Heskey, English footballer

    Place of birth: Leicester.

    Wikipedia: Emile Heskey

  21. Born in Britain and Ireland

    1993

    Michael Keane, English footballer

    Place of birth: Stockport.

    Wikipedia: Michael Keane

  22. 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 11 January

The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 13 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. 532

    Nika riots in Constantinople: A quarrel between supporters of different chariot teams—the Blues and the Greens—in the Hippodrome escalates into violence.

    Asia · ConstantinopleWikipedia: Nika riots
  2. 630

    Conquest of Mecca: Muhammad and his followers conquer the city, and the Quraysh association of clans surrenders.

    Asia · Conquest of MeccaWikipedia: Conquest of Mecca
  3. 930

    Sack of Mecca by the Qarmatians.

    no place on the mapWikipedia: Qarmatians
  4. 1055

    Theodora is crowned empress of the Byzantine Empire.

    Asia · Byzantine EmpireWikipedia: Theodora Porphyrogenita
  5. 1158

    Vladislaus II, Duke of Bohemia becomes King of Bohemia.

    Europe · Kingdom of BohemiaWikipedia: Vladislaus II, Duke and King of Bohemia
  6. 1569

    First recorded lottery in England.

    Britain & Ireland · Kingdom of EnglandWikipedia: Lottery
  7. 1654

    Arauco War: A Spanish army is defeated by local Mapuche-Huilliches as it tries to cross Bueno River in Southern Chile.

    no place on the mapWikipedia: Arauco War
  8. 1693

    The most powerful earthquake recorded in Italy struck the island of Sicily, causing 60,000 deaths and prompting a period of architectural revival.

    Europe · 1693 Sicily earthquakeWikipedia: 1693 Sicily earthquake
  9. 1759

    The first American life insurance company, the Corporation for Relief of Poor and Distressed Presbyterian Ministers and of the Poor and Distressed Widows and Children of the Presbyterian Ministers (now part of Unum Group), is incorporated in Philadelphia, Pennsylvania.

    North America · PhiladelphiaWikipedia: Life insurance
  10. 1787

    William Herschel discovers Titania and Oberon, two moons of Uranus.

    no place on the mapWikipedia: William Herschel
  11. 1805

    The Michigan Territory is created.

    North America · Michigan TerritoryWikipedia: Michigan Territory
  12. 1820

    The Great Savannah Fire of 1820 destroys over 400 buildings in Savannah, Georgia.

    North America · Savannah, GeorgiaWikipedia: Great Savannah Fire of 1820
  13. 1851

    Taiping Rebellion: Hong Xiuquan proclaims the Taiping Heavenly Kingdom, starting the Jintian Uprising.

    Asia · Site of the Jintian UprisingWikipedia: Taiping Rebellion
  14. 1861

    American Civil War: Alabama secedes from the United States.

  15. 1863

    American Civil War: CSS Alabama encounters and sinks the USS Hatteras off Galveston Lighthouse in Texas.

    North America · Action off Galveston LightWikipedia: Action off Galveston Light
  16. 1863

    American Civil War: The three-day Battle of Arkansas Post concludes as General John McClernand and Admiral David Dixon Porter capture Fort Hindman and secure control over the Arkansas River for the Union.

    North America · Battle of Arkansas PostWikipedia: Battle of Arkansas Post
  17. 1879

    The Anglo-Zulu War begins.

    no place on the mapWikipedia: Anglo-Zulu War
  18. 1908

    Grand Canyon National Monument is created.

    North America · Grand Canyon National ParkWikipedia: Grand Canyon National Park
  19. 1912

    Immigrant textile workers in Lawrence, Massachusetts, go on strike when wages are reduced in response to a mandated shortening of the work week.

    North America · LawrenceWikipedia: 1912 Lawrence textile strike
  20. 1914

    The Karluk, flagship of the Canadian Arctic Expedition, sinks after being crushed by ice.

    North America · Last voyage of the KarlukWikipedia: Canadian Arctic Expedition, 1913–1916
  21. 1917

    The Kingsland munitions factory explosion occurs, possibly as a result of German sabotage.

    North America · Kingsland explosionWikipedia: Kingsland explosion
  22. 1922

    Leonard Thompson becomes the first person to be injected with insulin.

    no place on the mapWikipedia: Leonard Thompson
  23. 1923

    Occupation of the Ruhr: Troops from France and Belgium occupy the Ruhr area to force Germany to make its World War I reparation payments.

    Europe · RuhrWikipedia: World War I
  24. 1927

    Louis B. Mayer, head of film studio Metro-Goldwyn-Mayer (MGM), announces the creation of the Academy of Motion Picture Arts and Sciences, at a banquet in Los Angeles, California.

    North America · Los AngelesWikipedia: Louis B. Mayer
  25. 1935

    Amelia Earhart becomes the first person to fly solo from Hawaii to California.

    no place on the mapWikipedia: Amelia Earhart
  26. 1942

    World War II: Japanese forces attack Tarakan in Borneo, Netherlands Indies (Battle of Tarakan)

    Asia · Battle of TarakanWikipedia: Battle of Tarakan
  27. 1942

    World War II: Japanese forces capture Kuala Lumpur, the capital of the Federated Malay States.

    Asia · Kuala LumpurWikipedia: Battle of Kuala Lumpur
  28. 1943

    Italian-American anarchist Carlo Tresca is assassinated in New York City.

    North America · New York CityWikipedia: Carlo Tresca
  29. 1943

    The Republic of China agrees to the Sino-British New Equal Treaty and the Sino-American New Equal Treaty.

    Asia · Republic of ChinaWikipedia: Republic of China
  30. 1946

    Enver Hoxha, Secretary General of the Communist Party of Albania, declares the People's Republic of Albania with himself as head of state.

    Europe · People's Socialist Republic of AlbaniaWikipedia: Enver Hoxha
  31. 1949

    The first "networked" television broadcasts took place as KDKA-TV in Pittsburgh, Pennsylvania goes on the air connecting the east coast and mid-west programming.

    North America · PittsburghWikipedia: KDKA-TV
  32. 1957

    The African Convention is founded in Dakar, Senegal.

    Africa · DakarWikipedia: African Convention
  33. 1959

    36 people are killed when Lufthansa Flight 502 crashes on approach to Rio de Janeiro/Galeão International Airport in Brazil.

    Latin America · Rio de Janeiro/Galeão International AirportWikipedia: Lufthansa Flight 502
  34. 1961

    Students at the University of Georgia rioted in an attempt to prevent the attendance of two African-American students.

    North America · University of GeorgiaWikipedia: University of Georgia desegregation riot
  35. 1961

    Throgs Neck Bridge over the East River, linking New York City's boroughs of The Bronx and Queens, opens to road traffic.

    North America · New York CityWikipedia: Throgs Neck Bridge
  36. 1962

    An avalanche on Huascarán in Peru causes around 4,000 deaths.

    Latin America · HuascaránWikipedia: Huascarán
  37. 1962

    Cold War: While tied to its pier in Polyarny, the Soviet submarine B-37 is destroyed when fire breaks out in its torpedo compartment.

    no place on the mapWikipedia: Cold War
  38. 1964

    Surgeon General of the United States Dr. Luther Terry, M.D., publishes the landmark report Smoking and Health: Report of the Advisory Committee to the Surgeon General of the Public Health Service saying that smoking may be hazardous to health, sparking national and worldwide anti-smoking efforts.

  39. 1966

    The Tbilisi Metro is opened.

    Asia · Tbilisi MetroWikipedia: Tbilisi Metro
  40. 1972

    East Pakistan renames itself Bangladesh.

    no place on the mapWikipedia: East Pakistan
  41. 1973

    Major League Baseball owners vote in approval of the American League adopting the designated hitter position.

  42. 1977

    The first episode of Finnish children's TV show Pikku Kakkonen ("Little Number Two") is aired on Yle TV2.

    no place on the mapWikipedia: Pikku Kakkonen
  43. 1983

    United Airlines Flight 2885 crashes after takeoff from Detroit Metropolitan Airport, killing three.

    North America · United Airlines Flight 2885Wikipedia: United Airlines Flight 2885
  44. 1986

    The Gateway Bridge, Brisbane, Queensland, Australia is officially opened.

  45. 1994

    The Irish Government announces the end of a 15-year broadcasting ban on the IRA and its political arm Sinn Féin.

    Britain & Ireland · Republic of IrelandWikipedia: Republic of Ireland
  46. 1995

    51 people are killed in a plane crash in María La Baja, Colombia.

    Latin America · Intercontinental de Aviación Flight 256Wikipedia: Intercontinental de Aviación Flight 256
  47. 1996

    Space Shuttle program: STS-72 launches from the Kennedy Space Center marking the start of the 74th Space Shuttle mission and the 10th flight of Endeavour.

    North America · Kennedy Space CenterWikipedia: Space Shuttle program
  48. 1998

    Over 100 people are killed in the Sidi-Hamed massacre in Algeria.

    Africa · AlgeriaWikipedia: Sidi-Hamed massacre
  49. 2003

    Illinois Governor George Ryan commutes the death sentences of 167 prisoners on Illinois's death row based on the Jon Burge scandal.

    North America · IllinoisWikipedia: Governor of Illinois
  50. 2013

    One French soldier and 17 militants are killed in a failed attempt to free a French hostage in Bulo Marer, Somalia.

    Africa · Bulo Marer hostage rescue attemptWikipedia: Bulo Marer hostage rescue attempt
  51. 2020

    COVID-19 pandemic in Hubei: Municipal health officials in Wuhan announce the first recorded death from COVID-19.

    Asia · WuhanWikipedia: COVID-19 pandemic in Hubei
  52. 2024

    Several thousand North Korean migrant workers in Helong engaged in civil unrest, including a factory occupation and the taking of managers as hostages, due to unpaid wages.

    Asia · HelongWikipedia: North Korean migrant workers

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. 1967

    In Mexico City, the last snowfall in its history occurs.

    Latin America · Mexico CityTranslated from the list on Wikipedia in SpanishWikipedia: Ciudad de México

Who was born on 11 January

In order of how many Wikipedia editions have an article about each. The first 60 of 229 are shown.

  1. 1842

    William James, American psychologist and philosopher (died 1910)

    Astor HouseWikipedia: William James
  2. 1755

    Alexander Hamilton, Nevisian-American general, economist and politician, 1st United States Secretary of the Treasury (died 1804)

    CharlestownWikipedia: Alexander Hamilton
  3. 1975

    Matteo Renzi, Italian politician, 56th Prime Minister of Italy

    FlorenceWikipedia: Matteo Renzi
  4. 347

    Theodosius I, Roman emperor (died 395)

    CocaWikipedia: Theodosius I
  5. 1954

    Kailash Satyarthi, Indian engineer, academic, and activist, Nobel Prize laureate

    VidishaWikipedia: Kailash Satyarthi
  6. 1906

    Albert Hofmann, Swiss chemist and academic, discoverer of LSD (died 2008)

    BadenWikipedia: Albert Hofmann
  7. 1979

    Siti Nurhaliza, Malaysian singer-songwriter and businesswoman

    Kampung AwahWikipedia: Siti Nurhaliza
  8. 1992

    Dani Carvajal, Spanish footballer

    LeganésWikipedia: Dani Carvajal
  9. 1987

    Jamie Vardy, English footballer

    SheffieldWikipedia: Jamie Vardy
  10. 1934

    Jean Chrétien, Canadian lawyer and politician, 20th Prime Minister of Canada

    ShawiniganWikipedia: Jean Chrétien
  11. 1859

    George Curzon, 1st Marquess Curzon of Kedleston, English politician, 35th Governor-General of India (died 1925)

  12. 1996

    Leroy Sané, German footballer

    EssenWikipedia: Leroy Sané
  13. 1815

    John A. Macdonald, Scottish-Canadian lawyer and politician, 1st Prime Minister of Canada (died 1891)

    GlasgowWikipedia: John A. Macdonald
  14. 1924

    Roger Guillemin, French-American physician and endocrinologist, Nobel Prize laureate (died 2024)

    DijonWikipedia: Roger Guillemin
  15. 1209

    Möngke Khan, Mongolian emperor (died 1259)

    Mongol EmpireWikipedia: Möngke Khan
  16. 1971

    Mary J. Blige, American singer-songwriter, producer, and actress

    The BronxWikipedia: Mary J. Blige
  17. 1978

    Emile Heskey, English footballer

    LeicesterWikipedia: Emile Heskey
  18. 1638

    Nicolas Steno, Danish bishop and anatomist (died 1686)

    CopenhagenWikipedia: Nicolas Steno
  19. 1503

    Parmigianino, Italian artist (died 1540)

    ParmaWikipedia: Parmigianino
  20. 1852

    Constantin Fehrenbach, German lawyer and politician, 4th Chancellor of Weimar Germany (died 1926)

    WellendingenWikipedia: Constantin Fehrenbach
  21. 1885

    Alice Paul, American activist and suffragist (died 1977)

    Mount LaurelWikipedia: Alice Paul
  22. 1903

    Alan Paton, South African author and activist (died 1988)

    PietermaritzburgWikipedia: Alan Paton
  23. 1911

    Zenkō Suzuki, Japanese politician, 70th Prime Minister of Japan (died 2004)

    YamadaWikipedia: Zenkō Suzuki
  24. 1930

    Rod Taylor, Australian-American actor and screenwriter (died 2015)

    SydneyWikipedia: Rod Taylor
  25. 1907

    Pierre Mendès France, French lawyer and politician, 142nd Prime Minister of France (died 1982)

    3rd arrondissement of ParisWikipedia: Pierre Mendès France
  26. 1983

    Adrian Sutil, German racing driver

    StarnbergWikipedia: Adrian Sutil
  27. 1993

    Michael Keane, English footballer

    StockportWikipedia: Michael Keane
  28. 1957

    Bryan Robson, English footballer and manager

    Chester-le-StreetWikipedia: Bryan Robson
  29. 1941

    Gérson, Brazilian footballer

    NiteróiWikipedia: Gérson
  30. 1961

    Karl von Habsburg, Austrian politician, Head of the House of Habsburg-Lorraine

    StarnbergWikipedia: Karl von Habsburg
  31. 1974

    Jens Nowotny, German footballer

    MalschWikipedia: Jens Nowotny
  32. 1982

    Son Ye-jin, South Korean actress

    DaeguWikipedia: Son Ye-jin
  33. 1997

    Cody Simpson, Australian singer-songwriter, guitarist, and actor

    Gold CoastWikipedia: Cody Simpson
  34. 1875

    Reinhold Glière, Russian composer and academic (died 1956)

    KyivWikipedia: Reinhold Glière
  35. 1984

    Stijn Schaars, Dutch footballer

    GendtWikipedia: Stijn Schaars
  36. 1867

    Edward B. Titchener, English psychologist and academic (died 1927)

    ChichesterWikipedia: Edward B. Titchener
  37. 1887

    Aldo Leopold, American ecologist and author (died 1948)

    BurlingtonWikipedia: Aldo Leopold
  38. 1907

    Abraham Joshua Heschel, Polish-American rabbi, theologian, and philosopher (died 1972)

    WarsawWikipedia: Abraham Joshua Heschel
  39. 1936

    Eva Hesse, German-American sculptor and educator (died 1970)

    HamburgWikipedia: Eva Hesse
  40. 1973

    Rahul Dravid, Indian cricketer

    IndoreWikipedia: Rahul Dravid
  41. 1952

    Diana Gabaldon, American author

    ScottsdaleWikipedia: Diana Gabaldon
  42. 1973

    Rockmond Dunbar, American actor

    BerkeleyWikipedia: Rockmond Dunbar
  43. 1942

    Clarence Clemons, American saxophonist and actor (died 2011)

    NorfolkWikipedia: Clarence Clemons
  44. 1916

    Bernard Blier, Argentinian-French actor (died 1989)

    Buenos AiresWikipedia: Bernard Blier
  45. 1985

    Aja Naomi King, American actress

    Los AngelesWikipedia: Aja Naomi King
  46. 1868

    Cai Yuanpei, Chinese philosopher, academic, and politician (died 1940)

    Yuecheng DistrictWikipedia: Cai Yuanpei
  47. 1923

    Carroll Shelby, American race car driver, engineer, and businessman, founded Carroll Shelby International (died 2012)

    LeesburgWikipedia: Carroll Shelby
  48. 1991

    Andrea Bertolacci, Italian footballer

    RomeWikipedia: Andrea Bertolacci
  49. 1993

    Will Keane, Irish footballer

    StockportWikipedia: Will Keane
  50. 1923

    Ernst Nolte, German historian and philosopher (died 2016)

    RüdinghausenWikipedia: Ernst Nolte
  51. 1926

    Lev Dyomin, Russian colonel, pilot, and astronaut (died 1998)

    MoscowWikipedia: Lev Dyomin
  52. 1876

    Thomas Hicks, American runner (died 1952)

    BirminghamWikipedia: Thomas Hicks
  53. 1940

    Andres Tarand, Estonian geographer and politician, 10th Prime Minister of Estonia

    TallinnWikipedia: Andres Tarand
  54. 1964

    Albert Dupontel, French actor and director

    Saint-Germain-en-LayeWikipedia: Albert Dupontel
  55. 1977

    Anni Friesinger-Postma, German speed skater

    Bad ReichenhallWikipedia: Anni Friesinger-Postma
  56. 1982

    Tony Allen, American basketball player

    ChicagoWikipedia: Tony Allen
  57. 1902

    Maurice Duruflé, French organist and composer (died 1986)

    LouviersWikipedia: Maurice Duruflé
  58. 1934

    Mitchell Ryan, American actor (died 2022)

    CincinnatiWikipedia: Mitchell Ryan
  59. 1945

    Christine Kaufmann, German actress, author, and businesswoman (died 2017)

    LengdorfWikipedia: Christine Kaufmann
  60. 1983

    André Myhrer, Swedish skier

    BergsjöWikipedia: André Myhrer

What is celebrated on 11 January

  • Children's Day (Tunisia)
  • Christian feast day: Anastasius of Suppentonia (Roman Catholic)
  • Christian feast day: Leucius of Brindisi (Roman Catholic)
  • Christian feast day: Paulinus II of Aquileia
  • Christian feast day: Pope Hyginus
  • Christian feast day: Theodosius the Cenobiarch
  • Christian feast day: Thomas of Cori
  • Christian feast day: Vitalis of Gaza (Roman Catholic)
  • Christian feast day: January 11 (Eastern Orthodox liturgics)
  • Eugenio María de Hostos Day (Puerto Rico)
  • Independence Resistance Day (Morocco)
  • Kagami biraki (Japan)
  • National Human Trafficking Awareness Day (United States)
  • Republic Day (Albania)

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