A day on the globeROENES中文
The Earth on 4 January, with the rays of the day’s events
  1. A birthday on the globe

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

    For 4 January, the English Wikipedia lists 52 events and 196 births. 25 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 4 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 4 January the Sun passes straight overhead at noon along the parallel of 22.7° south. In London, the day lasts about 8 hours.

    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. 4 January

    Britain and Ireland#

    Six events from the day’s list are placed here, between 871 and 1977.

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

  4. Britain & Ireland · Old Bailey

    1972

    Rose Heilbron becomes the first female judge to sit at the Old Bailey in London, UK.

    On the map: Old Bailey.

    Wikipedia: Rose Heilbron

  5. Britain & Ireland · Heathrow Airport

    1977

    The English punk-rock band Sex Pistols' lewd and disruptive behaviour at Heathrow Airport prompted the record label EMI to end their contract.

    On the map: Heathrow Airport.

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

    Wikipedia: Punk rock

  6. 4 January

    Europe#

    Seven events from the day’s list are placed here, between 1762 and 2019.

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

  7. Europe · Bucharest

    1798

    Constantine Hangerli arrives in Bucharest, Wallachia, as its new Prince, invested by the Ottoman Empire.

    On the map: Bucharest.

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

    Wikipedia: Constantine Hangerli

  8. Europe · Kuopio

    1844

    The first issue of the Swedish-languaged Saima newspaper founded by J. V. Snellman is published in Kuopio, Finland.

    On the map: Kuopio.

    Wikipedia: Saima

  9. Europe · Hamburg

    1863

    The New Apostolic Church, a Christian and chiliastic church, is established in Hamburg, Germany.

    On the map: Hamburg.

    Wikipedia: New Apostolic Church

  10. 4 January

    Asia#

    Eight events from the day’s list are placed here, between 1885 and 2020.

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

  11. Asia · Burj Khalifa

    2010

    The Burj Khalifa, the current tallest building in the world, officially opens in Dubai.

    On the map: Burj Khalifa.

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

    Wikipedia: Burj Khalifa

  12. Asia · Sembawang Hot Spring Park

    2020

    Sembawang Hot Spring Park in Singapore reopened after being redeveloped by the National Parks Board.

    On the map: Sembawang Hot Spring Park.

    Wikipedia: Sembawang Hot Spring Park

  13. 4 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 Romanian, Chinese and Spanish and were translated for this page.

  14. From Wikipedia in Romanian · Chimborazo

    1880

    The British mountaineer Edward Whymper becomes the first to climb Chimborazo (6,267 m), one of the highest peaks in the Andes.

    On the map: Chimborazo.

    Translated from the list on Wikipedia in Romanian.

    The article on Wikipedia in Romanian: Chimborazo

  15. From Wikipedia in Chinese · Peking University

    1917

    Cai Yuanpei takes up the post of president of Peking University.

    On the map: Peking University.

    Translated from the list on Wikipedia in Chinese.

    The article on Wikipedia in Chinese: 北京大学

  16. From Wikipedia in Spanish · Jerusalem

    1964

    Pope Paul VI visits Jerusalem, where he meets Athenagoras (Patriarch of Constantinople and head of the Greek Orthodox Church).

    On the map: Jerusalem.

    Translated from the list on Wikipedia in Spanish.

    The article on Wikipedia in Spanish: Iglesia ortodoxa

  17. 4 January

    Born on 4 January#

    The English Wikipedia lists 196 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.

  18. Born on 4 January

    1940

    Gao Xingjian, Chinese novelist, playwright, and critic, Nobel Prize laureate

    Place of birth: Ganxian District.

    Wikipedia: Gao Xingjian

  19. Born on 4 January

    1809

    Louis Braille, French educator, invented Braille (died 1852)

    Place of birth: Coupvray.

    Wikipedia: Louis Braille

  20. Born on 4 January

    1990

    Toni Kroos, German footballer

    Place of birth: Greifswald.

    Wikipedia: Toni Kroos

  21. Born on 4 January

    1940

    Brian Josephson, Welsh physicist and academic, Nobel Prize laureate

    Place of birth: Cardiff.

    Wikipedia: Brian Josephson

  22. Born on 4 January

    1986

    James Milner, English footballer

    Place of birth: Leeds.

    Wikipedia: James Milner

  23. Born in Britain and Ireland

    1965

    Julia Ormond, English actress and producer

    Place of birth: Epsom.

    Wikipedia: Julia Ormond

  24. Born in Britain and Ireland

    1942

    John McLaughlin, English guitarist and songwriter

    Place of birth: Doncaster.

    Wikipedia: John McLaughlin

  25. Born in Britain and Ireland

    1958

    Julian Sands, English actor (died 2023)

    Place of birth: Otley.

    Wikipedia: Julian Sands

  26. 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 4 January

The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 21 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. 46 BC

    Julius Caesar fights Titus Labienus in the Battle of Ruspina.

    Africa · Battle of RuspinaWikipedia: Battle of Ruspina
  2. 871

    Battle of Reading: Æthelred of Wessex and his brother Alfred are defeated by a Danish invasion army.

    Britain & Ireland · Battle of ReadingWikipedia: Battle of Reading
  3. 1642

    English Civil War: King Charles I, accompanied by 400 soldiers, attempts to arrest five members of Parliament for treason, only to discover the men had been tipped off and fled.

  4. 1649

    English Civil War: The Rump Parliament votes to put Charles I on trial.

    no place on the mapWikipedia: Rump Parliament
  5. 1698

    Most of London's Palace of Whitehall, the main residence of English monarchs since 1530, was destroyed by fire.

    Britain & Ireland · Palace of WhitehallWikipedia: Palace of Whitehall
  6. 1717

    The Netherlands, Great Britain, and France sign the Triple Alliance.

    no place on the mapWikipedia: Triple Alliance
  7. 1762

    Great Britain declares war on Spain, which meant the entry of Spain into the Seven Years' War.

    Europe · SpainWikipedia: Seven Years' War
  8. 1798

    Constantine Hangerli arrives in Bucharest, Wallachia, as its new Prince, invested by the Ottoman Empire.

    Europe · BucharestWikipedia: Constantine Hangerli
  9. 1844

    The first issue of the Swedish-languaged Saima newspaper founded by J. V. Snellman is published in Kuopio, Finland.

    Europe · KuopioWikipedia: Saima
  10. 1853

    After having been kidnapped and sold into slavery in the American South, Solomon Northup regains his freedom; his memoir Twelve Years a Slave later becomes a national bestseller.

    no place on the mapWikipedia: Solomon Northup
  11. 1854

    The McDonald Islands are discovered by Captain William McDonald aboard the Samarang.

    Oceans · Heard Island and McDonald IslandsWikipedia: Heard Island and McDonald Islands
  12. 1863

    The New Apostolic Church, a Christian and chiliastic church, is established in Hamburg, Germany.

    Europe · HamburgWikipedia: New Apostolic Church
  13. 1878

    Russo-Turkish War (1877–78): Sofia is liberated from Ottoman rule.

    Europe · SofiaWikipedia: Russo-Turkish War
  14. 1884

    The Fabian Society is founded in London, United Kingdom.

    no place on the mapWikipedia: Fabian Society
  15. 1885

    Sino-French War: French troops under General Oscar de Négrier defeat a numerically superior Qing force at Núi Bop in northern Vietnam.

    Asia · Battle of Núi BopWikipedia: Sino-French War
  16. 1896

    Utah is admitted as the 45th U.S. state.

    North America · UtahWikipedia: Utah
  17. 1903

    Topsy, an elephant, is electrocuted by the owners of Luna Park, Coney Island. The Edison film company records the film Electrocuting an Elephant of Topsy's death.

    North America · Luna ParkWikipedia: Topsy
  18. 1909

    Explorer Aeneas Mackintosh of the Imperial Trans-Antarctic Expedition escaped death by fleeing across ice floes.

  19. 1912

    The Scout Association is incorporated throughout the British Empire by royal charter.

    Britain & Ireland · British EmpireWikipedia: The Scout Association
  20. 1918

    The Finnish Declaration of Independence is recognized by Russia, Sweden, Germany and France.

  21. 1936

    Billboard published its first music hit parade.

    no place on the mapWikipedia: Billboard
  22. 1944

    World War II: Operation Carpetbagger, involving the dropping of arms and supplies to resistance fighters in Europe, begins.

    no place on the mapWikipedia: World War II
  23. 1946

    The first day of a three-day "disastrous" tornado outbreak across the south-central United States leaves 41 people dead and at least 412 others injured.

  24. 1948

    Burma gains its independence from the United Kingdom, becoming an independent republic.

    Asia · MyanmarWikipedia: Myanmar
  25. 1951

    Korean War: Chinese and North Korean forces capture Seoul for the second time.

    Asia · Third Battle of SeoulWikipedia: Korean War
  26. 1956

    The Greek National Radical Union is formed by Konstantinos Karamanlis.

  27. 1958

    Sputnik 1, the first artificial Earth satellite, launched by the Soviet Union in 1957, falls to Earth from orbit.

    no place on the mapWikipedia: Sputnik 1
  28. 1959

    Luna 1 becomes the first spacecraft to reach the vicinity of the Moon.

    no place on the mapWikipedia: Luna 1
  29. 1965

    Aeroflot Flight 101/X-20 crashes on approach to Alma-Ata Airport, killing 64 people.

    Asia · Aeroflot Flight 101/X-20Wikipedia: Aeroflot Flight 101/X-20
  30. 1967

    The Doors released their eponymous debut album.

    no place on the mapWikipedia: The Doors
  31. 1970

    A magnitude-7.1 earthquake occurred in Tonghai County, China, killing at least 15,000 people.

    Asia · 1970 Tonghai earthquakeWikipedia: 1970 Tonghai earthquake
  32. 1972

    Rose Heilbron becomes the first female judge to sit at the Old Bailey in London, UK.

    Britain & Ireland · Old BaileyWikipedia: Rose Heilbron
  33. 1973

    Last of the Summer Wine, the longest-running sitcom in the world, premiered as an episode of the BBC's Comedy Playhouse.

  34. 1975

    This date overflowed the 12-bit field that had been used in TOPS-10. There were numerous problems and crashes related to this bug while an alternative format was developed.

    no place on the mapWikipedia: TOPS-10
  35. 1976

    The Troubles: The Ulster Volunteer Force shoots dead six Irish Catholic civilians in County Armagh, Northern Ireland. The next day, gunmen would shoot dead ten Protestant civilians nearby in retaliation.

    Britain & Ireland · Reavey and O'Dowd killingsWikipedia: The Troubles
  36. 1977

    The English punk-rock band Sex Pistols' lewd and disruptive behaviour at Heathrow Airport prompted the record label EMI to end their contract.

    Britain & Ireland · Heathrow AirportWikipedia: Punk rock
  37. 1987

    The Maryland train collision: An Amtrak train en route to Boston from Washington, D.C., collides with Conrail engines in Chase, Maryland, United States, killing 16 people.

    North America · BostonWikipedia: 1987 Maryland train collision
  38. 1989

    Second Gulf of Sidra incident: A pair of Libyan MiG-23 "Floggers" are shot down by a pair of US Navy F-14 Tomcats during an air-to-air confrontation.

    Africa · 1989 air battle near TobrukWikipedia: 1989 air battle near Tobruk
  39. 1990

    In Pakistan's deadliest train accident an overloaded passenger train collides with an empty freight train, resulting in 307 deaths and 700 injuries.

  40. 1998

    A massive ice storm hits eastern Canada and the northeastern United States, continuing through January 10 and causing widespread destruction.

    North America · January 1998 North American ice stormWikipedia: January 1998 North American ice storm
  41. 1999

    Former professional wrestler Jesse Ventura is sworn in as governor of Minnesota, United States.

    North America · MinnesotaWikipedia: Jesse Ventura
  42. 2000

    A Norwegian passenger train departing from Trondheim, collides with a local train coming from Hamar in Åsta in Åmot Municipality; 19 people are killed and 68 injured in the accident.

    Europe · TrondheimWikipedia: Åsta accident
  43. 2004

    Mikheil Saakashvili is elected President of Georgia following the November 2003 Rose Revolution.

  44. 2004

    Spirit, a NASA Mars rover, lands successfully on Mars at 04:35 UTC.

    no place on the mapWikipedia: Spirit
  45. 2006

    Ehud Olmert becomes acting Prime Minister of Israel after the incumbent, Ariel Sharon, suffers a second, apparently more serious stroke.

    no place on the mapWikipedia: Ehud Olmert
  46. 2007

    The 110th United States Congress convenes, electing Nancy Pelosi as the first female Speaker of the House in U.S. history.

  47. 2008

    A Let L-410 Turbolet crashes in the Los Roques Archipelago in Venezuela, killing 14 people.

    Latin America · 2008 Los Roques Archipelago Transaven Let L-410 crashWikipedia: 2008 Los Roques Archipelago Transaven Let L-410 crash
  48. 2010

    The Burj Khalifa, the current tallest building in the world, officially opens in Dubai.

    Asia · Burj KhalifaWikipedia: Burj Khalifa
  49. 2013

    A gunman kills eight people in a house-to-house rampage in Kawit, Cavite, Philippines.

    Asia · CaviteWikipedia: Kawit shooting
  50. 2018

    Hennenman–Kroonstad train crash: A passenger train operated by Shosholoza Meyl collides with a truck on a level crossing at Geneva Station between Hennenman and Kroonstad, Free State, South Africa. Twenty people are killed and 260 injured.

    Africa · HennenmanWikipedia: Hennenman–Kroonstad train crash
  51. 2019

    A fire in an escape room in Koszalin, Poland, kills five teenagers through carbon monoxide poisoning.

    Europe · Koszalin escape room fireWikipedia: Koszalin escape room fire
  52. 2020

    Sembawang Hot Spring Park in Singapore reopened after being redeveloped by the National Parks Board.

    Asia · Sembawang Hot Spring ParkWikipedia: Sembawang Hot Spring Park

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 Romanian, Chinese and Spanish and were translated for this page.

  1. 1880

    The British mountaineer Edward Whymper becomes the first to climb Chimborazo (6,267 m), one of the highest peaks in the Andes.

    Latin America · ChimborazoTranslated from the list on Wikipedia in RomanianWikipedia: Chimborazo
  2. 1917

    Cai Yuanpei takes up the post of president of Peking University.

    Asia · Peking UniversityTranslated from the list on Wikipedia in ChineseWikipedia: 北京大学
  3. 1964

    Pope Paul VI visits Jerusalem, where he meets Athenagoras (Patriarch of Constantinople and head of the Greek Orthodox Church).

    Asia · JerusalemTranslated from the list on Wikipedia in SpanishWikipedia: Iglesia ortodoxa

Who was born on 4 January

In order of how many Wikipedia editions have an article about each. The first 60 of 196 are shown.

  1. 1940

    Gao Xingjian, Chinese novelist, playwright, and critic, Nobel Prize laureate

    Ganxian DistrictWikipedia: Gao Xingjian
  2. 1809

    Louis Braille, French educator, invented Braille (died 1852)

    CoupvrayWikipedia: Louis Braille
  3. 1990

    Toni Kroos, German footballer

    GreifswaldWikipedia: Toni Kroos
  4. 1785

    Jacob Grimm, German philologist and mythologist (died 1863)

    HanauWikipedia: Jacob Grimm
  5. 1940

    Brian Josephson, Welsh physicist and academic, Nobel Prize laureate

    CardiffWikipedia: Brian Josephson
  6. 1986

    James Milner, English footballer

    LeedsWikipedia: James Milner
  7. 1963

    Till Lindemann, German singer, songwriter, and poet

    LeipzigWikipedia: Till Lindemann
  8. 1710

    Giovanni Battista Pergolesi, Italian composer, violinist, and organist (died 1736)

  9. 1932

    Carlos Saura, Spanish director and screenwriter (died 2023)

    HuescaWikipedia: Carlos Saura
  10. 659

    Ali ibn Husayn Zayn al-Abidin (died 680)

    MedinaWikipedia: Ali al-Sajjad
  11. 1945

    Richard R. Schrock, American chemist and academic, Nobel Prize laureate

    BerneWikipedia: Richard R. Schrock
  12. 1848

    Katsura Tarō, Japanese general and politician, 6th Prime Minister of Japan (died 1913)

    HagiWikipedia: Katsura Tarō
  13. 1965

    Julia Ormond, English actress and producer

    EpsomWikipedia: Julia Ormond
  14. 1937

    Dyan Cannon, American actress, director, producer, and screenwriter

    TacomaWikipedia: Dyan Cannon
  15. 1960

    Michael Stipe, American singer-songwriter and producer

    DecaturWikipedia: Michael Stipe
  16. 2005

    Dafne Keen, British-Spanish actress

    MadridWikipedia: Dafne Keen
  17. 1929

    Günter Schabowski, German journalist and politician (died 2015)

    AnklamWikipedia: Günter Schabowski
  18. 1934

    Rudolf Schuster, Slovak politician, 2nd President of Slovakia

    KošiceWikipedia: Rudolf Schuster
  19. 2003

    Jaeden Martell, American actor

    PhiladelphiaWikipedia: Jaeden Martell
  20. 1903

    Georg Elser, German carpenter and attempted assassin of Adolf Hitler (died 1945)

    HermaringenWikipedia: Georg Elser
  21. 1942

    John McLaughlin, English guitarist and songwriter

    DoncasterWikipedia: John McLaughlin
  22. 1958

    Julian Sands, English actor (died 2023)

    OtleyWikipedia: Julian Sands
  23. 2004

    Victor Wembanyama, French basketball player

    Le ChesnayWikipedia: Victor Wembanyama
  24. 1896

    André Masson, French painter and illustrator (died 1987)

    Balagny-sur-ThérainWikipedia: André Masson
  25. 1980

    Miguel Monteiro, Portuguese footballer

    LisbonWikipedia: Miguel Monteiro
  26. 1992

    Quincy Promes, Dutch footballer

    AmsterdamWikipedia: Quincy Promes
  27. 1997

    Angeliño, Spanish footballer

    SilvánWikipedia: Angeliño
  28. 1874

    Josef Suk, Czech violinist and composer (died 1935)

    KřečoviceWikipedia: Josef Suk
  29. 1958

    Matt Frewer, American-Canadian actor

    Washington, D.C.Wikipedia: Matt Frewer
  30. 1581

    James Ussher, Irish archbishop and historian (died 1656)

    DublinWikipedia: James Ussher
  31. 1987

    Przemysław Tytoń, Polish footballer

    ZamośćWikipedia: Przemysław Tytoń
  32. 2001

    Odilon Kossounou, Ivorian footballer

    AbidjanWikipedia: Odilon Kossounou
  33. 1913

    Malietoa Tanumafili II, Samoan ruler (died 2007)

    SamoaWikipedia: Malietoa Tanumafili II
  34. 1935

    Floyd Patterson, American boxer (died 2006)

    WacoWikipedia: Floyd Patterson
  35. 1996

    Jasmine Paolini, Italian tennis player

    Castelnuovo di GarfagnanaWikipedia: Jasmine Paolini
  36. 2000

    Max Aarons, English footballer

    LondonWikipedia: Max Aarons
  37. 1985

    Ross Turnbull, English footballer and coach

    Bishop AucklandWikipedia: Ross Turnbull
  38. 1987

    Danny Simpson, English footballer

    EcclesWikipedia: Danny Simpson
  39. 1990

    Alberto Paloschi, Italian footballer

    ChiariWikipedia: Alberto Paloschi
  40. 2006

    Marc Guiu, Spanish footballer

    GranollersWikipedia: Marc Guiu
  41. 1077

    Emperor Zhezong of China (died 1100)

    KaifengWikipedia: Emperor Zhezong
  42. 1985

    Jung Sung-ryong, South Korean footballer

    SeongnamWikipedia: Jung Sung-ryong
  43. 1953

    Norberto Alonso, Argentinian footballer

    FloridaWikipedia: Norberto Alonso
  44. 1986

    Younès Kaboul, French footballer

    Saint-Julien-en-GenevoisWikipedia: Younes Kaboul
  45. 1941

    George P. Cosmatos, Italian-Canadian director and screenwriter (died 2005)

    FlorenceWikipedia: George P. Cosmatos
  46. 1881

    Wilhelm Lehmbruck, German sculptor (died 1919)

    MeiderichWikipedia: Wilhelm Lehmbruck
  47. 1990

    Iago Falque, Spanish footballer

    VigoWikipedia: Iago Falque
  48. 1998

    Coco Jones, American singer-songwriter and actress

    ColumbiaWikipedia: Coco Jones
  49. 1998

    Liza Soberano, Filipina actress

    Santa ClaraWikipedia: Liza Soberano
  50. 1897

    Chen Cheng, Chinese politician, Vice President of the Republic of China (died 1965)

    QingtianWikipedia: Chen Cheng
  51. 1900

    James Bond, American ornithologist and zoologist (died 1989)

    PhiladelphiaWikipedia: James Bond
  52. 1927

    Barbara Rush, American actress (died 2024)

    DenverWikipedia: Barbara Rush
  53. 1991

    Charles Melton, American actor

    Wikipedia: Charles Melton
  54. 1995

    Adam Webster, English footballer

    ChichesterWikipedia: Adam Webster
  55. 1334

    Amadeus VI, Count of Savoy (died 1383)

    ChambéryWikipedia: Amadeus VI of Savoy
  56. 1965

    Beth Gibbons, English singer and songwriter

    ExeterWikipedia: Beth Gibbons
  57. 1999

    Daniel Arzani, Iranian-Australian footballer

    KhorramabadWikipedia: Daniel Arzani
  58. 1901

    C. L. R. James, Trinidadian journalist and theorist (died 1989)

    TunapunaWikipedia: C. L. R. James
  59. 1978

    Dominik Hrbatý, Slovak tennis player

    BratislavaWikipedia: Dominik Hrbatý
  60. 1948

    Cissé Mariam Kaïdama Sidibé, Malian civil servant and politician, Prime Minister of Mali (died 2021)

What is celebrated on 4 January

  • Christian feast day: Angela of Foligno
  • Christian feast day: Elizabeth Ann Seton
  • Christian feast day: Ferréol of Uzès
  • Christian feast day: Mavilus
  • Christian feast day: Pharaildis of Ghent
  • Christian feast day: Rigobert
  • Christian feast day: January 4 (Eastern Orthodox liturgics)
  • The eleventh of the Twelve Days of Christmas. (Western Christianity)
  • Independence Day (Myanmar), celebrates the independence of Myanmar from the United Kingdom in 1948.
  • Colonial Martyrs Repression Day (Angola)
  • Day of the Martyrs (Democratic Republic of the Congo)
  • Ogoni Day (Movement for the Survival of the Ogoni People)
  • Tokyo Dome Show: The annual Wrestle Kingdom event run by New Japan Pro-Wrestling
  • World Braille Day

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