A day on the globeROENES中文
The Earth on 2 April, with the rays of the day’s events
  1. A birthday on the globe

    2 April on the globe: what happened in the world on this day, and who was born

    For 2 April, the English Wikipedia lists 44 events and 222 births. 27 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 2 April

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

    On 2 April the Sun passes straight overhead at noon along the parallel of 5.1° north. In London, the day lasts about 13 hours.

    Beyond 85° north the Sun no longer sets; beyond 85° south 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. 2 April

    Britain and Ireland#

    Two events from the day’s list are placed here, between 1871 and 2015.

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

  4. Britain & Ireland · Royal Court Theatre

    1871

    Creatures of Impulse, by W. S. Gilbert, premiered at the Court Theatre in London.

    On the map: Royal Court Theatre.

    Wikipedia: Royal Court Theatre

  5. 2 April

    Europe#

    Seven events from the day’s list are placed here, between 1800 and 2024.

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

  6. Europe · Vienna

    1800

    Ludwig van Beethoven leads the premiere of his First Symphony in Vienna.

    On the map: Vienna.

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

    Wikipedia: Ludwig van Beethoven

  7. 2 April

    Latin America and the Caribbean#

    Two events from the day’s list are placed here, between 1982 and 1989.

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

  8. Latin America · Havana

    1989

    Soviet leader Mikhail Gorbachev arrives in Havana, Cuba, to meet with Fidel Castro in an attempt to mend strained relations.

    On the map: Havana.

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

    Wikipedia: Soviet Union

  9. 2 April

    North America#

    12 events from the day’s list are placed here, between 1513 and 2025.

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

  10. North America · Uptown Theater

    1968

    2001: A Space Odyssey, the epic science fiction film produced and directed by Stanley Kubrick, premiered at the Uptown Theater in Washington, D.C.

    On the map: Uptown Theater.

    Wikipedia: 2001: A Space Odyssey

  11. North America · White House Rose Garden

    2025

    Liberation Day tariffs: U.S. President Donald Trump announces sweeping worldwide tariffs.

    On the map: White House Rose Garden.

    Wikipedia: Liberation Day tariffs

  12. 2 April

    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, Romanian and Chinese and were translated for this page.

  13. From Wikipedia in Spanish · Vitoria-Gasteiz

    1332

    In Vitoria (Spain), the deed of incorporation of Álava into Castile is signed, with Castile recognising Álava's charter of rights.

    On the map: Vitoria-Gasteiz.

    Translated from the list on Wikipedia in Spanish.

    The article on Wikipedia in Spanish: Álava

  14. From Wikipedia in Romanian · Constantinople

    1453

    Mehmed II begins the assault on the city of Constantinople.

    On the map: Constantinople.

    Translated from the list on Wikipedia in Romanian.

    The article on Wikipedia in Romanian: Mahomed al II-lea

  15. From Wikipedia in Spanish · Madrid

    1550

    In Madrid, the King of Spain orders that Castilian be taught to the indigenous peoples.

    On the map: Madrid.

    Translated from the list on Wikipedia in Spanish.

    The article on Wikipedia in Spanish: Indígenas de América

  16. From Wikipedia in Chinese · United States Congress

    1900

    Under the Foraker Act passed by the United States Congress, Puerto Rico is granted limited self-government.

    On the map: United States Congress.

    Translated from the list on Wikipedia in Chinese.

    The article on Wikipedia in Chinese: 美国国会

  17. From Wikipedia in Spanish · Dortmund

    1974

    In Dortmund (Germany), the Signal Iduna Park stadium is inaugurated.

    On the map: Dortmund.

    Translated from the list on Wikipedia in Spanish.

    The article on Wikipedia in Spanish: Signal Iduna Park

  18. 2 April

    Born on 2 April#

    The English Wikipedia lists 222 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.

  19. Born on 2 April

    1805

    Hans Christian Andersen, Danish novelist, short story writer, and poet (died 1875)

    Place of birth: Odense.

    Wikipedia: Hans Christian Andersen

  20. Born on 2 April

    1840

    Émile Zola, French novelist, playwright, journalist (died 1902)

    Place of birth: rue Saint-Joseph.

    Wikipedia: Émile Zola

  21. Born on 2 April

    1725

    Giacomo Casanova, Italian explorer and author (died 1798)

    Place of birth: Venice.

    Wikipedia: Giacomo Casanova

  22. Born on 2 April

    1914

    Alec Guinness, English actor (died 2000)

    Place of birth: Marylebone.

    Wikipedia: Alec Guinness

  23. Born on 2 April

    1939

    Marvin Gaye, American singer-songwriter (died 1984)

    Place of birth: Washington, D.C..

    Wikipedia: Marvin Gaye

  24. Born in Britain and Ireland

    1966

    Teddy Sheringham, English international footballer and coach

    Place of birth: Highams Park.

    Wikipedia: Teddy Sheringham

  25. 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 2 April

The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 11 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. 1107

    Seljuq sultan Muhammad I Tapar begins the siege of Shahdiz, a fortress of the Nizari Ismailis.

    Asia · ShahdizWikipedia: Shahdiz
  2. 1285

    Election of Pope Honorius IV following the death of Pope Martin IV.

    no place on the mapWikipedia: Pope Honorius IV
  3. 1513

    Having spotted land on March 27, Spanish explorer Juan Ponce de León comes ashore on what is now the U.S. state of Florida, landing somewhere between the modern city of St. Augustine and the mouth of the St. Johns River.

    North America · St. Augustine, FloridaWikipedia: Juan Ponce de León
  4. 1725

    J. S. Bach's cantata Bleib bei uns, denn es will Abend werden, BWV 6, is first performed in Leipzig on Easter Monday.

  5. 1755

    Commodore William James captures the Maratha fortress of Suvarnadurg on the west coast of India.

    Asia · SuvarnadurgWikipedia: Commodore
  6. 1792

    The Coinage Act is passed by Congress, establishing the United States Mint.

  7. 1800

    Ludwig van Beethoven leads the premiere of his First Symphony in Vienna.

    Europe · ViennaWikipedia: Ludwig van Beethoven
  8. 1801

    French Revolutionary Wars: In the Battle of Copenhagen a British Royal Navy squadron defeats a hastily assembled, smaller, mostly-volunteer Dano-Norwegian Navy at high cost, forcing Denmark out of the Second League of Armed Neutrality.

    Europe · Battle of CopenhagenWikipedia: Battle of Copenhagen
  9. 1860

    The first modern Italian Parliament is opened in Turin, following the annexation of Central Italy into the Kingdom of Sardinia.

    Europe · TurinWikipedia: Italian Parliament
  10. 1863

    American Civil War: The largest in a series of Southern bread riots occurs in Richmond, Virginia.

    North America · Richmond, VirginiaWikipedia: American Civil War
  11. 1865

    American Civil War: Defeat at the Third Battle of Petersburg forces the Army of Northern Virginia and the Confederate government to abandon Richmond, Virginia.

    North America · Third Battle of PetersburgWikipedia: Third Battle of Petersburg
  12. 1871

    Creatures of Impulse, by W. S. Gilbert, premiered at the Court Theatre in London.

    Britain & Ireland · Royal Court TheatreWikipedia: Royal Court Theatre
  13. 1885

    Canadian Cree warriors attack the village of Frog Lake, killing nine.

    North America · Frog Lake MassacreWikipedia: Frog Lake Massacre
  14. 1911

    The Australian Bureau of Statistics conducts the country's first national census.

  15. 1912

    The ill-fated RMS Titanic begins sea trials.

    no place on the mapWikipedia: Titanic
  16. 1917

    American entry into World War I: President Wilson asks the U.S. Congress for a declaration of war on Germany.

  17. 1921

    The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.

  18. 1930

    After the mysterious death of Empress Zewditu, Haile Selassie is proclaimed emperor of Ethiopia.

    Africa · EthiopiaWikipedia: Zewditu
  19. 1968

    2001: A Space Odyssey, the epic science fiction film produced and directed by Stanley Kubrick, premiered at the Uptown Theater in Washington, D.C.

    North America · Uptown TheaterWikipedia: 2001: A Space Odyssey
  20. 1969

    LOT Polish Airlines Flight 165 crashes into the Polica mountain near Zawoja, Poland, killing 53.

    Europe · LOT Polish Airlines Flight 165Wikipedia: LOT Polish Airlines Flight 165
  21. 1975

    Vietnam War: Thousands of civilian refugees flee from Quảng Ngãi Province in front of advancing North Vietnamese troops.

    no place on the mapWikipedia: Vietnam War
  22. 1976

    Prince Norodom Sihanouk resigns as leader of Cambodia and is placed under house arrest.

    Asia · CambodiaWikipedia: Norodom Sihanouk
  23. 1979

    A Soviet bio-warfare laboratory at Sverdlovsk accidentally releases airborne anthrax spores, killing 66 plus an unknown amount of livestock.

    Asia · Sverdlovsk anthrax leakWikipedia: Sverdlovsk anthrax leak
  24. 1980

    United States President Jimmy Carter signs the Crude Oil Windfall Profits Tax Act.

    no place on the mapWikipedia: Jimmy Carter
  25. 1982

    Falklands War: Argentina invades the Falkland Islands.

    Latin America · Falklands WarWikipedia: Falklands War
  26. 1986

    Alabama governor George Wallace, a former segregationist, best known for the "Stand in the Schoolhouse Door", announces that he will not seek a fifth four-year term and will retire from public life upon the end of his term in January 1987.

    North America · Stand in the Schoolhouse DoorWikipedia: Alabama
  27. 1989

    Soviet leader Mikhail Gorbachev arrives in Havana, Cuba, to meet with Fidel Castro in an attempt to mend strained relations.

    Latin America · HavanaWikipedia: Soviet Union
  28. 1991

    Rita Johnston becomes the first female Premier of a Canadian province when she succeeds William Vander Zalm (who had resigned) as Premier of British Columbia.

    no place on the mapWikipedia: Rita Johnston
  29. 1992

    Forty-two civilians are massacred in the town of Bijeljina in Bosnia and Herzegovina.

    Europe · Bijeljina massacreWikipedia: Bijeljina massacre
  30. 1992

    In New York, Mafia boss John Gotti is convicted of murder and racketeering and is later sentenced to life in prison.

    North America · New YorkWikipedia: New York
  31. 2002

    Israeli forces surround the Church of the Nativity in Bethlehem, into which armed Palestinians had retreated.

    Asia · Siege of the Church of the NativityWikipedia: Israel
  32. 2004

    Islamist terrorists involved in the 11 March 2004 Madrid attacks attempt to bomb the Spanish high-speed train AVE near Madrid; the attack is thwarted.

    Europe · 2004 Madrid train bombingsWikipedia: 2004 Madrid train bombings
  33. 2006

    Over 60 tornadoes break out in the United States; Tennessee is hardest hit with 29 people killed.

    North America · TennesseeWikipedia: Tornado
  34. 2011

    India wins the Cricket World Cup for the second time in history under the captaincy of MS Dhoni.

  35. 2012

    A mass shooting at Oikos University in California leaves seven people dead and three injured.

    North America · 2012 Oikos University shootingWikipedia: 2012 Oikos University shooting
  36. 2012

    UTair Flight 120 crashes after takeoff from Roshchino International Airport in Tyumen, Russia, killing 33 and injuring 10.

    Asia · UTair Flight 120Wikipedia: UTair Flight 120
  37. 2014

    A spree shooting occurs at the Fort Hood army base in Texas, with four dead, including the gunman, and 16 others injured.

    North America · 2014 Fort Hood shootingsWikipedia: 2014 Fort Hood shootings
  38. 2015

    Four men steal items worth up to £200 million from an underground safe deposit facility in London's Hatton Garden area in what has been called the "largest burglary in English legal history."

    Britain & Ireland · Hatton Garden safe deposit burglaryWikipedia: Hatton Garden safe deposit burglary
  39. 2015

    Gunmen attack Garissa University College in Kenya, killing at least 148 people and wounding 79 others.

    Africa · Garissa University College attackWikipedia: Garissa University College attack
  40. 2020

    COVID-19 pandemic: The total number of confirmed cases reach one million.

    no place on the mapWikipedia: COVID-19 pandemic
  41. 2021

    A Capitol Police officer is killed and another injured when an attacker rams his car into a barricade outside the United States Capitol.

    North America · 2021 United States Capitol car attackWikipedia: 2021 United States Capitol car attack
  42. 2021

    At least 49 people are killed in a train derailment in Taiwan after a truck accidentally rolls onto the track.

    Asia · TaiwanWikipedia: 2021 Hualien train derailment
  43. 2024

    Viertola school shooting: A 12-year-old pupil is killed and two others injured by a shooter of the same age in Vantaa, Finland.

    Europe · 2024 Viertola school shootingWikipedia: 2024 Viertola school shooting
  44. 2025

    Liberation Day tariffs: U.S. President Donald Trump announces sweeping worldwide tariffs.

    North America · White House Rose GardenWikipedia: Liberation Day tariffs

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, Romanian and Chinese and were translated for this page.

  1. 1332

    In Vitoria (Spain), the deed of incorporation of Álava into Castile is signed, with Castile recognising Álava's charter of rights.

    Europe · Vitoria-GasteizTranslated from the list on Wikipedia in SpanishWikipedia: Álava
  2. 1453

    Mehmed II begins the assault on the city of Constantinople.

    Asia · ConstantinopleTranslated from the list on Wikipedia in RomanianWikipedia: Mahomed al II-lea
  3. 1550

    In Madrid, the King of Spain orders that Castilian be taught to the indigenous peoples.

    Europe · MadridTranslated from the list on Wikipedia in SpanishWikipedia: Indígenas de América
  4. 1900

    Under the Foraker Act passed by the United States Congress, Puerto Rico is granted limited self-government.

    North America · United States CongressTranslated from the list on Wikipedia in ChineseWikipedia: 美国国会
  5. 1974

    In Dortmund (Germany), the Signal Iduna Park stadium is inaugurated.

    Europe · DortmundTranslated from the list on Wikipedia in SpanishWikipedia: Signal Iduna Park

Who was born on 2 April

In order of how many Wikipedia editions have an article about each. The first 60 of 222 are shown.

  1. 1805

    Hans Christian Andersen, Danish novelist, short story writer, and poet (died 1875)

    OdenseWikipedia: Hans Christian Andersen
  2. 747

    Charlemagne, Frankish king (died 814)

    FranciafWikipedia: Charlemagne
  3. 1840

    Émile Zola, French novelist, playwright, journalist (died 1902)

    rue Saint-JosephWikipedia: Émile Zola
  4. 1725

    Giacomo Casanova, Italian explorer and author (died 1798)

    VeniceWikipedia: Giacomo Casanova
  5. 1914

    Alec Guinness, English actor (died 2000)

    MaryleboneWikipedia: Alec Guinness
  6. 1939

    Marvin Gaye, American singer-songwriter (died 1984)

    Washington, D.C.Wikipedia: Marvin Gaye
  7. 1647

    Maria Sibylla Merian, German-Dutch botanist and illustrator (died 1717)

    FrankfurtWikipedia: Maria Sibylla Merian
  8. 1977

    Michael Fassbender, German-Irish actor and producer

    HeidelbergWikipedia: Michael Fassbender
  9. 1891

    Max Ernst, German painter, sculptor, and poet (died 1976)

    BrühlWikipedia: Max Ernst
  10. 1928

    Serge Gainsbourg, French singer-songwriter, actor, and director (died 1991)

    4th arrondissement of ParisWikipedia: Serge Gainsbourg
  11. 1975

    Pedro Pascal, Chilean and American actor

    SantiagoWikipedia: Pedro Pascal
  12. 1969

    Ajay Devgn, Indian actor, director, and producer

    New DelhiWikipedia: Ajay Devgn
  13. 1926

    Jack Brabham, Australian race car driver (died 2014)

    HurstvilleWikipedia: Jack Brabham
  14. 1986

    Ibrahim Afellay, Dutch footballer

    UtrechtWikipedia: Ibrahim Afellay
  15. 1755

    Jean Anthelme Brillat-Savarin, French lawyer and politician (died 1826)

    Hôtel Brillat-SavarinWikipedia: Jean Anthelme Brillat-Savarin
  16. 1990

    Miralem Pjanić, Bosnian footballer

    TuzlaWikipedia: Miralem Pjanić
  17. 1838

    Léon Gambetta, French lawyer and politician, 45th Prime Minister of France (died 1882)

    CahorsWikipedia: Léon Gambetta
  18. 1862

    Nicholas Murray Butler, American philosopher and academic, Nobel Prize laureate (died 1947)

    ElizabethWikipedia: Nicholas Murray Butler
  19. 1966

    Teddy Sheringham, English international footballer and coach

    Highams ParkWikipedia: Teddy Sheringham
  20. 1996

    André Onana, Cameroonian footballer

    CentreWikipedia: André Onana
  21. 1827

    William Holman Hunt, English soldier and painter (died 1910)

    LondonWikipedia: William Holman Hunt
  22. 1945

    Linda Hunt, American actress

    MorristownWikipedia: Linda Hunt
  23. 1962

    Clark Gregg, American actor

    Wikipedia: Clark Gregg
  24. 1982

    David Ferrer, Spanish tennis player

    XàbiaWikipedia: David Ferrer
  25. 1971

    Edmundo Alves de Souza Neto, Brazilian footballer

    NiteróiWikipedia: Edmundo
  26. 1798

    August Heinrich Hoffmann von Fallersleben, German poet and academic (died 1874)

  27. 1982

    Marco Amelia, Italian footballer

    FrascatiWikipedia: Marco Amelia
  28. 1841

    Clément Ader, French engineer, designed the Ader Avion III (died 1926)

    MuretWikipedia: Clément Ader
  29. 1947

    Camille Paglia, American author and critic

    EndicottWikipedia: Camille Paglia
  30. 2002

    Emma Myers, American actress

    OrlandoWikipedia: Emma Myers
  31. 1545

    Elisabeth of Valois, queen consort of Spain (died 1568)

    FontainebleauWikipedia: Elisabeth of Valois
  32. 1947

    Emmylou Harris, American singer-songwriter and guitarist

    BirminghamWikipedia: Emmylou Harris
  33. 1980

    Carlos Salcido, Mexican international footballer

    OcotlánWikipedia: Carlos Salcido
  34. 1988

    Jesse Plemons, American actor

    DallasWikipedia: Jesse Plemons
  35. 1618

    Francesco Maria Grimaldi, Italian mathematician and physicist (died 1663)

    BolognaWikipedia: Francesco Maria Grimaldi
  36. 1842

    Dominic Savio, Italian Catholic saint, adolescent student of Saint John Bosco (died 1857)

    San GiovanniWikipedia: Dominic Savio
  37. 1875

    Walter Chrysler, American businessman, founded Chrysler (died 1940)

    WamegoWikipedia: Walter Chrysler
  38. 1934

    Paul Cohen, American mathematician and theorist (died 2007)

    Long BranchWikipedia: Paul Cohen
  39. 1961

    Christopher Meloni, American actor

    Washington, D.C.Wikipedia: Christopher Meloni
  40. 1653

    Prince George of Denmark, Duke of Cumberland (died 1708)

    Copenhagen CastleWikipedia: Prince George of Denmark
  41. 1965

    Rodney King, American victim of police brutality (died 2012)

    SacramentoWikipedia: Rodney King
  42. 1991

    Quavo, American rapper

    AthensWikipedia: Quavo
  43. 1792

    Francisco de Paula Santander, Colombian general and politician, 4th President of the Republic of the New Granada (died 1840)

    Villa del RosarioWikipedia: Francisco de Paula Santander
  44. 1960

    Linford Christie, Jamaican-English sprinter

    Saint Andrew ParishWikipedia: Linford Christie
  45. 1971

    Todd Woodbridge, Australian tennis player and sportscaster

    SydneyWikipedia: Todd Woodbridge
  46. 1983

    Arthur Boka, Ivorian footballer

    AbidjanWikipedia: Arthur Boka
  47. 1984

    Miguel Ángel Moyá, Spanish footballer

    BinissalemWikipedia: Miguel Ángel Moyá
  48. 1990

    Yevgeniya Kanayeva, Russian gymnast

    OmskWikipedia: Evgeniya Kanaeva
  49. 2000

    Josip Stanišić, Croatian footballer

    MunichWikipedia: Josip Stanišić
  50. 1973

    Roselyn Sánchez, Puerto Rican-American actress

    San JuanWikipedia: Roselyn Sánchez
  51. 1933

    György Konrád, Hungarian sociologist and author (died 2019)

    DebrecenWikipedia: György Konrád
  52. 181

    Emperor Xian of Han, Chinese emperor (died 234)

    LuoyangWikipedia: Emperor Xian of Han
  53. 1959

    Juha Kankkunen, Finnish race car driver

    LaukaaWikipedia: Juha Kankkunen
  54. 1586

    Pietro Della Valle, Italian traveler (died 1652)

    RomeWikipedia: Pietro Della Valle
  55. 1902

    Menachem Mendel Schneerson, the seventh Lubavitcher Rebbe (died 1994)

    MykolaivWikipedia: Menachem Mendel Schneerson
  56. 1908

    Buddy Ebsen, American actor and dancer (died 2003)

    BellevilleWikipedia: Buddy Ebsen
  57. 1994

    Pascal Siakam, Cameroonian basketball player

    DoualaWikipedia: Pascal Siakam
  58. 1959

    Badou Ezzaki, Moroccan footballer and manager

    Sidi KacemWikipedia: Ezzaki Badou
  59. 1942

    Leon Russell, American singer-songwriter and pianist (died 2016)

    LawtonWikipedia: Leon Russell
  60. 1985

    Stéphane Lambiel, Swiss figure skater

    MartignyWikipedia: Stéphane Lambiel

What is celebrated on 2 April

  • Christian feast day: Abundius of Como
  • Christian feast day: Amphianus of Lycia
  • Christian feast day: Æbbe the Younger
  • Christian feast day: Bronach of Glen-Seichis (Irish martyrology)
  • Christian feast day: Blessed Elisabetta Vendramini
  • Christian feast day: Francis of Paola
  • Christian feast day: Francisco Coll Guitart
  • Christian feast day: Henry Budd (Anglican Church of Canada)
  • Christian feast day: Blessed Laura Evangelista Alvarado Cardozo
  • Christian feast day: Blessed Nicholas Charnetsky
  • Christian feast day: Nicetius of Lyon
  • Christian feast day: Theodosia of Tyre
  • Christian feast day: Urban of Langres
  • Christian feast day: Blessed Vilmos Apor

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