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

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

    For 24 December, the English Wikipedia lists 59 events and 207 births. 37 of the events stand at their places as rays of light; five 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 December

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

    On 24 December the Sun passes straight overhead at noon along the parallel of 23.4° south. In London, the day lasts about 7 hours 50 minutes.

    Beyond 67° south the Sun no longer sets; beyond 67° 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. 24 December

    Europe#

    12 events from the day’s list are placed here, between 1500 and 2003.

    The globe stops at two of them; the whole list is further down. All 12

  4. Europe · Nikolauskirche, Oberndorf

    1818

    The first performance of "Silent Night" takes place in the Nikolauskirche in Oberndorf, Austria.

    On the map: Nikolauskirche, Oberndorf.

    Wikipedia: Silent Night

  5. Europe · Ensemble de Lancement Vega

    1979

    The first Ariane 1 rocket is launched from ELA-1 at the Guiana Space Centre.

    On the map: Ensemble de Lancement Vega.

    Wikipedia: Ariane 1

  6. 24 December

    Africa#

    Nine events from the day’s list are placed here, between 971 and 2005.

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

  7. Africa · Cairo

    1871

    Aida, one of Giuseppe Verdi's most popular operas, made its debut in Cairo, Egypt.

    On the map: Cairo.

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

    Wikipedia: Aida

  8. 24 December

    Oceania#

    Three events from the day’s list are placed here, between 1777 and 1974.

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

  9. Oceania · Kiritimati

    1777

    Kiritimati, also called Christmas Island, is discovered by James Cook.

    On the map: Kiritimati.

    Also on the day’s list of Wikipedia in Spanish, Romanian and Chinese.

    Wikipedia: Kiritimati

  10. 24 December

    North America#

    Eight events from the day’s list are placed here, between 1913 and 1996.

    The globe stops at two of them; the whole list is further down. All eight

  11. North America · NORAD

    1955

    According to legend, the NORAD Tracks Santa program began after children began calling the Continental Air Defense Command Center to inquire about Santa Claus's whereabouts due to a misprinted phone number in an advertisement.

    On the map: NORAD.

    Wikipedia: NORAD

  12. North America · United States Congress

    1973

    The U.S. Congress granted home rule to Washington, D.C., allowing the residents to elect their own mayor and a city council.

    On the map: United States Congress.

    Wikipedia: United States Congress

  13. 24 December

    Born on 24 December#

    The English Wikipedia lists 207 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 24 December

    1818

    James Prescott Joule, English physicist and brewer (died 1889)

    Place of birth: Salford.

    Wikipedia: James Prescott Joule

  15. Born on 24 December

    1798

    Adam Mickiewicz, Polish poet and playwright (died 1855)

    Place of birth: Zavosse.

    Wikipedia: Adam Mickiewicz

  16. Born on 24 December

    1922

    Ava Gardner, American actress (died 1990)

    Place of birth: Grabtown.

    Wikipedia: Ava Gardner

  17. Born on 24 December

    1868

    Emanuel Lasker, German chess player, mathematician, and philosopher (died 1941)

    Place of birth: Barlinek.

    Wikipedia: Emanuel Lasker

  18. Born on 24 December

    1971

    Ricky Martin, Puerto Rican singer-songwriter and actor

    Place of birth: Río Piedras.

    Wikipedia: Ricky Martin

  19. Born in Britain and Ireland

    1822

    Matthew Arnold, English poet and critic (died 1888)

    Place of birth: Laleham.

    Wikipedia: Matthew Arnold

  20. Born in Britain and Ireland

    1945

    Lemmy, English hard rock singer-songwriter and bass player (died 2015)

    Place of birth: Burslem.

    Wikipedia: Lemmy

  21. Born in Britain and Ireland

    1991

    Louis Tomlinson, English singer

    Place of birth: Doncaster.

    Wikipedia: Louis Tomlinson

  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 24 December

The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 17 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. 502

    Chinese emperor Xiao Yan names Xiao Tong his heir designate.

    no place on the mapWikipedia: Emperor of China
  2. 640

    Pope John IV is elected, several months after his predecessor's death.

    no place on the mapWikipedia: Pope John IV
  3. 759

    Tang dynasty poet Du Fu departs for Chengdu, where he is hosted by fellow poet Pei Di.

    no place on the mapWikipedia: Tang dynasty
  4. 971

    Battle of Ayn Shams: The Fatimids under Jawhar defeat the Qarmatians at the gates of Cairo, putting an end to the First Qarmatian invasion of Egypt.

    Africa · CairoWikipedia: First Qarmatian invasion of Egypt
  5. 1144

    The capital of the crusader County of Edessa falls to Imad ad-Din Zengi, the atabeg of Mosul and Aleppo.

    Asia · Siege of EdessaWikipedia: Siege of Edessa
  6. 1294

    Pope Boniface VIII is elected, replacing St. Celestine V, who had resigned.

  7. 1500

    A joint Venetian–Spanish fleet captures the Castle of St. George on the island of Cephalonia.

    Europe · Siege of the Castle of Saint GeorgeWikipedia: Siege of the Castle of Saint George
  8. 1737

    The Marathas defeat the combined forces of the Mughal Empire, Rajputs of Jaipur, Nizam of Hyderabad, Nawab of Awadh and Nawab of Bengal in the Battle of Bhopal.

    Africa · Battle of BhopalWikipedia: Battle of Bhopal
  9. 1777

    Kiritimati, also called Christmas Island, is discovered by James Cook.

    Oceania · KiritimatiWikipedia: Kiritimati
  10. 1800

    The Plot of the rue Saint-Nicaise fails to kill Napoleon Bonaparte.

    Europe · Plot of the rue Saint-NicaiseWikipedia: Plot of the rue Saint-Nicaise
  11. 1814

    Representatives of the United Kingdom and the United States sign the Treaty of Ghent, ending the War of 1812.

    Europe · Hotel d'Hane-SteenhuyseWikipedia: Treaty of Ghent
  12. 1818

    The first performance of "Silent Night" takes place in the Nikolauskirche in Oberndorf, Austria.

    Europe · Nikolauskirche, OberndorfWikipedia: Silent Night
  13. 1846

    British acquired Labuan from the Sultanate of Brunei for Great Britain.

    Britain & Ireland · United Kingdom of Great Britain and IrelandWikipedia: Crown Colony of Labuan
  14. 1865

    Former Confederate officers Frank McCord, Richard Reed, John Lester, John Kennedy, J. Calvin Jones, and James Crowe form the Ku Klux Klan.

    no place on the mapWikipedia: Ku Klux Klan
  15. 1868

    The Greek Presidential Guard is established as the royal escort by King George I.

  16. 1871

    Aida, one of Giuseppe Verdi's most popular operas, made its debut in Cairo, Egypt.

    Africa · CairoWikipedia: Aida
  17. 1906

    Reginald Fessenden transmits the first radio broadcast; consisting of a poetry reading, a violin solo, and a speech.

  18. 1913

    The Italian Hall disaster in Calumet, Michigan results in the deaths of 73 striking workers families at a Christmas party participants (including 59 children) when someone falsely yells "fire".

    North America · Italian Hall disasterWikipedia: Italian Hall disaster
  19. 1914

    World War I: The "Christmas truce" begins.

    no place on the mapWikipedia: World War I
  20. 1918

    Region of Međimurje is captured by the Kingdom of Serbs, Croats and Slovenes from Hungary.

    Europe · 1918 occupation of MeđimurjeWikipedia: 1918 occupation of Međimurje
  21. 1920

    Gabriele D'Annunzio surrendered the Italian Regency of Carnaro in the city of Fiume to Italian Armed Forces.

    Europe · RijekaWikipedia: Gabriele D'Annunzio
  22. 1924

    Albania becomes a republic.

    Europe · AlbaniaWikipedia: Albania
  23. 1925

    Winnie-the-Pooh first appeared by name in a children's story in the London Evening News.

    no place on the mapWikipedia: Winnie-the-Pooh
  24. 1929

    A four alarm fire breaks out in the West Wing of the White House in Washington, D.C.

    North America · West WingWikipedia: West Wing
  25. 1929

    Assassination attempt on Argentine President Hipólito Yrigoyen.

    Latin America · ArgentinaWikipedia: Argentina
  26. 1939

    World War II: Pope Pius XII makes a Christmas Eve appeal for peace.

    no place on the mapWikipedia: World War II
  27. 1941

    World War II: Benghazi is conquered by the British Eighth Army.

    Africa · BenghaziWikipedia: Benghazi
  28. 1941

    World War II: Kuching is conquered by Japanese forces.

    Asia · KuchingWikipedia: Kuching
  29. 1942

    World War II: French monarchist, Fernand Bonnier de La Chapelle, assassinates Vichy French Admiral François Darlan in Algiers, Algeria.

    Africa · AlgiersWikipedia: Monarchism in France
  30. 1943

    World War II: U.S. General Dwight D. Eisenhower is named Supreme Allied Commander for Operation Overlord.

    Europe · Operation OverlordWikipedia: Operation Overlord
  31. 1944

    World War II: The Belgian Troopship Leopoldville was torpedoed and sank with the loss of 763 soldiers and 56 crew.

    no place on the mapWikipedia: SS Léopoldville
  32. 1945

    Five of nine children become missing after their home in Fayetteville, West Virginia, is burned down.

    North America · Sodder children disappearanceWikipedia: Sodder children disappearance
  33. 1951

    Libya becomes independent. Idris I is proclaimed King of Libya.

    Africa · LibyaWikipedia: Libya
  34. 1952

    First flight of Britain's Handley Page Victor strategic bomber.

  35. 1953

    Tangiwai disaster: In New Zealand's North Island, at Tangiwai, a railway bridge is damaged by a lahar and collapses beneath a passenger train, killing 151 people.

    Oceania · TangiwaiWikipedia: Tangiwai disaster
  36. 1955

    A flood devastates California, killing 74 people across portions of the state.

  37. 1955

    According to legend, the NORAD Tracks Santa program began after children began calling the Continental Air Defense Command Center to inquire about Santa Claus's whereabouts due to a misprinted phone number in an advertisement.

    North America · NORADWikipedia: NORAD
  38. 1964

    Flying Tiger Line Flight 282 crashes after takeoff from San Francisco International Airport, killing three.

    North America · Flying Tiger Line Flight 282Wikipedia: Flying Tiger Line Flight 282
  39. 1964

    Vietnam War: Viet Cong operatives bomb the Brinks Hotel in Saigon, South Vietnam to demonstrate they can strike an American installation in the heavily guarded capital.

    Asia · 1964 Brinks Hotel bombingWikipedia: Vietnam War
  40. 1966

    A Canadair CL-44 chartered by the United States military crashes into a small village in South Vietnam, killing 111.

  41. 1968

    Allegheny Airlines Flight 736 crashes on approach to Bradford Regional Airport, killing 20.

    North America · Allegheny Airlines Flight 736Wikipedia: Allegheny Airlines Flight 736
  42. 1968

    Apollo program: The crew of Apollo 8 enters into orbit around the Moon, becoming the first humans to do so. They performed ten lunar orbits, took the Earthrise photograph, broadcast live TV pictures, and read the first ten verses of Genesis.

  43. 1969

    Nigerian troops capture Umuahia, the Biafran capital.

    Africa · UmuahiaWikipedia: Umuahia
  44. 1971

    LANSA Flight 508 is struck by lightning and crashes in the Puerto Inca District in the Department of Huánuco in Peru, killing 91.

    Latin America · Puerto Inca DistrictWikipedia: LANSA Flight 508
  45. 1973

    District of Columbia Home Rule Act is passed, allowing residents of Washington, D.C. to elect their own local government.

  46. 1973

    The U.S. Congress granted home rule to Washington, D.C., allowing the residents to elect their own mayor and a city council.

    North America · United States CongressWikipedia: United States Congress
  47. 1974

    Cyclone Tracy devastates Darwin, Australia.

    Oceania · DarwinWikipedia: Cyclone Tracy
  48. 1979

    The Soviet government deployed troops in Afghanistan, starting the Soviet–Afghan War.

  49. 1979

    The first Ariane 1 rocket is launched from ELA-1 at the Guiana Space Centre.

    Europe · Ensemble de Lancement VegaWikipedia: Ariane 1
  50. 1983

    Aeroflot Flight 601 crashes during takeoff from Leshukonskoye Airport, Russia, killing 44 of the 49 people on board.

    Europe · Aeroflot Flight 601Wikipedia: Aeroflot Flight 601
  51. 1994

    Air France Flight 8969 is hijacked on the ground at Houari Boumediene Airport, Algiers, Algeria. Over the course of three days three passengers are killed, as are all four terrorists.

    Europe · Air France Flight 8969Wikipedia: Air France Flight 8969
  52. 1996

    A Learjet 35 crashes into Smarts Mountain near Dorchester, New Hampshire, killing both pilots on board.

    North America · 1996 New Hampshire Learjet 35 crashWikipedia: 1996 New Hampshire Learjet 35 crash
  53. 1997

    The Sid El-Antri massacre in Algeria kills between 50 and 100 people.

    Africa · AlgeriaWikipedia: Sid El-Antri massacre
  54. 1999

    Indian Airlines Flight 814 is hijacked in Indian airspace between Kathmandu, Nepal, and Delhi, India. The aircraft landed at Kandahar in Afghanistan. The incident ended on December 31 with the release of 190 survivors (one passenger is killed).

    Asia · Indian Airlines Flight 814Wikipedia: Indian Airlines Flight 814
  55. 2003

    The Spanish police thwart an attempt by ETA to detonate 50 kg of explosives at 3:55 p.m. inside Madrid's busy Chamartín Station.

    Europe · MadridWikipedia: ETA
  56. 2005

    Chad–Sudan relations: Chad declares a state of belligerence against Sudan following a December 18 attack on Adré, which left about 100 people dead.

    Africa · Battle of AdréWikipedia: Battle of Adré
  57. 2008

    The Lord's Resistance Army, a Ugandan rebel group, begins a series of attacks against civilians in the Democratic Republic of the Congo, massacring more than 400.

  58. 2018

    A helicopter crash kills Martha Érika Alonso, first female Governor of Puebla, Mexico, and her husband Rafael Moreno Valle Rosas, former governor.

    Latin America · 2018 Puebla helicopter crashWikipedia: 2018 Puebla helicopter crash
  59. 2021

    Burmese military forces commit the Mo So massacre, killing at least 44 civilians.

    Asia · Mo So massacreWikipedia: Mo So massacre

Who was born on 24 December

In order of how many Wikipedia editions have an article about each. The first 60 of 207 are shown.

  1. 1818

    James Prescott Joule, English physicist and brewer (died 1889)

    SalfordWikipedia: James Prescott Joule
  2. 1961

    Ilham Aliyev, Azerbaijani businessman and politician, 4th President of Azerbaijan

    BakuWikipedia: Ilham Aliyev
  3. 1798

    Adam Mickiewicz, Polish poet and playwright (died 1855)

    ZavosseWikipedia: Adam Mickiewicz
  4. 1957

    Hamid Karzai, Afghan politician, 12th President of Afghanistan

    KarzWikipedia: Hamid Karzai
  5. 1943

    Tarja Halonen, Finnish lawyer and politician, 11th President of Finland

    HelsinkiWikipedia: Tarja Halonen
  6. 1166

    John, King of England (died 1216)

    Beaumont PalaceWikipedia: John, King of England
  7. 3 BC

    Galba, Roman emperor (died 69)

    TerracinaWikipedia: Galba
  8. 1922

    Ava Gardner, American actress (died 1990)

    GrabtownWikipedia: Ava Gardner
  9. 1868

    Emanuel Lasker, German chess player, mathematician, and philosopher (died 1941)

    BarlinekWikipedia: Emanuel Lasker
  10. 1971

    Ricky Martin, Puerto Rican singer-songwriter and actor

    Río PiedrasWikipedia: Ricky Martin
  11. 1837

    Empress Elisabeth of Austria (died 1898)

  12. 1981

    Dima Bilan, Russian singer-songwriter and actor

    Ust-DzhegutaWikipedia: Dima Bilan
  13. 1973

    Stephenie Meyer, American author and film producer

    HartfordWikipedia: Stephenie Meyer
  14. 1761

    Selim III, Ottoman sultan (died 1808)

    IstanbulWikipedia: Selim III
  15. 1905

    Howard Hughes, American businessman, engineer, and pilot (died 1976)

    HoustonWikipedia: Howard Hughes
  16. 1822

    Matthew Arnold, English poet and critic (died 1888)

    LalehamWikipedia: Matthew Arnold
  17. 1934

    Stjepan Mesić, Croatian lawyer and politician, 2nd President of Croatia

    OrahovicaWikipedia: Stjepan Mesić
  18. 1945

    Lemmy, English hard rock singer-songwriter and bass player (died 2015)

    BurslemWikipedia: Lemmy
  19. 1845

    George I of Greece (died 1913)

    CopenhagenWikipedia: George I of Greece
  20. 1940

    Anthony Fauci, American physician, Director of National Institute of Allergy and Infectious Diseases

    BrooklynWikipedia: Anthony Fauci
  21. 1956

    Anil Kapoor, Indian actor and producer

    MumbaiWikipedia: Anil Kapoor
  22. 1991

    Louis Tomlinson, English singer

    DoncasterWikipedia: Louis Tomlinson
  23. 1969

    Ed Miliband, British politician, Foreign Secretary

    LondonWikipedia: Ed Miliband
  24. 1998

    Alexis Mac Allister, Argentine footballer

    Santa RosaWikipedia: Alexis Mac Allister
  25. 1843

    Lydia Koidula, Estonian poet and playwright (died 1886)

    VändraWikipedia: Lydia Koidula
  26. 1997

    Neeraj Chopra, Indian javelin thrower

    Panipat districtWikipedia: Neeraj Chopra
  27. 1822

    Charles Hermite, French mathematician (died 1901)

    DieuzeWikipedia: Charles Hermite
  28. 1927

    Mary Higgins Clark, American author (died 2020)

    New York CityWikipedia: Mary Higgins Clark
  29. 1886

    Michael Curtiz, Hungarian-American actor, director, and producer (died 1962)

    BudapestWikipedia: Michael Curtiz
  30. 1946

    Jeff Sessions, American lawyer and politician, 44th Attorney General of Alabama and 84th Attorney General of the United States

    HybartWikipedia: Jeff Sessions
  31. 1634

    Mariana of Austria (died 1696)

    ViennaWikipedia: Mariana of Austria
  32. 1974

    Marcelo Salas, Chilean footballer

    TemucoWikipedia: Marcelo Salas
  33. 1980

    Stephen Appiah, Ghanaian footballer

    AccraWikipedia: Stephen Appiah
  34. 1961

    Mary Barra, American businesswoman, current CEO and chairwoman of General Motors

    WaterfordWikipedia: Mary Barra
  35. 1970

    Amaury Nolasco, Puerto Rican actor

    ViequesWikipedia: Amaury Nolasco
  36. 1887

    Louis Jouvet, French actor and producer (died 1951)

    CrozonWikipedia: Louis Jouvet
  37. 1910

    Fritz Leiber, American author and poet (died 1992)

    ChicagoWikipedia: Fritz Leiber
  38. 1992

    Serge Aurier, Ivorian footballer

    OuragahioWikipedia: Serge Aurier
  39. 1879

    Alexandrine of Mecklenburg-Schwerin (died 1952)

  40. 1809

    Kit Carson, American general (died 1868)

    RichmondWikipedia: Kit Carson
  41. 1961

    Wade Williams, American actor

    TulsaWikipedia: Wade Williams
  42. 1919

    Pierre Soulages, French artist (died 2022)

    RodezWikipedia: Pierre Soulages
  43. 1974

    Ryan Seacrest, American radio host and television personality, and producer

    AtlantaWikipedia: Ryan Seacrest
  44. 1754

    George Crabbe, English priest, surgeon, and poet (died 1832)

    AldeburghWikipedia: George Crabbe
  45. 1892

    Ruth Chatterton, American actress (died 1961)

    New York CityWikipedia: Ruth Chatterton
  46. 1588

    Constance of Austria (died 1631)

    GrazWikipedia: Constance of Austria
  47. 1937

    Félix, Brazilian footballer and manager (died 2012)

    São PauloWikipedia: Félix
  48. 1959

    Lee Daniels, American director and producer

    PhiladelphiaWikipedia: Lee Daniels
  49. 1995

    Anett Kontaveit, Estonian tennis player

    TallinnWikipedia: Anett Kontaveit
  50. 1966

    Diedrich Bader, American actor

    AlexandriaWikipedia: Diedrich Bader
  51. 1978

    Yıldıray Baştürk, German-Turkish footballer

    HerneWikipedia: Yıldıray Baştürk
  52. 1955

    Clarence Gilyard, American actor and educator (died 2022)

    Moses LakeWikipedia: Clarence Gilyard
  53. 1962

    Kate Spade, American fashion designer (died 2018)

    Kansas CityWikipedia: Kate Spade
  54. 1929

    Lennart Skoglund, Swedish footballer (died 1975)

    StockholmWikipedia: Lennart Skoglund
  55. 1810

    Wilhelm Marstrand, Danish painter and illustrator (died 1873)

    CopenhagenWikipedia: Wilhelm Marstrand
  56. 1906

    Franz Waxman, German-American composer and conductor (died 1967)

    ChorzówWikipedia: Franz Waxman
  57. 1931

    Mauricio Kagel, Argentinian-German composer and scholar (died 2008)

    Buenos AiresWikipedia: Mauricio Kagel
  58. 1954

    José María Figueres, Costa Rican businessman and politician, President of Costa Rica (1994–1998)

    San JoséWikipedia: José María Figueres
  59. 1980

    Maarja-Liis Ilus, Estonian pop musician

    TallinnWikipedia: Maarja-Liis Ilus
  60. 1389

    John V, Duke of Brittany (died 1442)

    VannesWikipedia: John V of Brittany

What is celebrated on 24 December

  • Christian feast day: Adela and Irmina
  • Christian feast day: Paola Elisabetta Cerioli
  • Christian feast day: Adam and Eve
  • Christian feast day: December 24 (Eastern Orthodox liturgics)
  • Christmas Eve (Christianity) and its related observances: Aðfangadagskvöld, the day when the 13th and the last Yule Lad arrives to towns. (Iceland)
  • Christmas Eve (Christianity) and its related observances: Feast of the Seven Fishes (Italian Americans)
  • Christmas Eve (Christianity) and its related observances: Juleaften (Denmark)/Julaften (Norway)/Julafton (Sweden)
  • Christmas Eve (Christianity) and its related observances: Nittel Nacht (certain Orthodox Jewish denominations)
  • Christmas Eve (Christianity) and its related observances: Nochebuena (Spain and Spanish-speaking countries)
  • Christmas Eve (Christianity) and its related observances: The Declaration of Christmas Peace (Old Great Square of Turku, Finland's official Christmas City)
  • Christmas Eve (Christianity) and its related observances: Wigilia (Poland)
  • Christmas Eve (Christianity) and its related observances: Quviasukvik, the Inuit new year (Alaska, Canada, Greenland and Russia)
  • Christmas Eve (Christianity) and its related observances: Kūčios (Lithuania)
  • Independence Day (Libya)

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