A birthday on the globe
16 December on the globe: what happened in the world on this day, and who was born
For 16 December, the English Wikipedia lists 56 events and 229 births. 35 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:
Turn it into a greetingScroll: the globe turns to each place
The day you were born, on the globe.
Three things from your day
Scroll: your day first, then 16 December through the years
The Earth on 16 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 16 December the Sun passes straight overhead at noon along the parallel of 23.3° 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.
Britain & Ireland · Cardiff Arms Park
1905
In rugby union, the "Match of the Century" is played between Wales and New Zealand at Cardiff Arms Park.
On the map: Cardiff Arms Park.
Oceania · Lyttelton, New Zealand
1850
The Charlotte Jane and the Randolph bring the first of the Canterbury Pilgrims to Lyttelton, New Zealand.
On the map: Lyttelton, New Zealand.
North America · Carnegie Hall
1893
Czech composer Antonín Dvořák's New World Symphony (audio featured) premiered at Carnegie Hall in New York City.
On the map: Carnegie Hall.
16 December
What the other Wikipedias remember#
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Spanish and were translated for this page.
From Wikipedia in Spanish · New York City
1966
In New York, the United Nations General Assembly adopts the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights.
On the map: New York City.
Translated from the list on Wikipedia in Spanish.
The article on Wikipedia in Spanish: Pacto Internacional de Derechos Civiles y Políticos
16 December
Born on 16 December#
The English Wikipedia lists 229 births for this day. The blue points are the birthplaces of 59 of these people: those written about in the most Wikipedia editions, where Wikidata gives a place of birth.
Born on 16 December
1770
Ludwig van Beethoven, composer (died 1827)
Place of birth: Bonn.
Born on 16 December
1775
Jane Austen, English novelist (died 1817)
Place of birth: Steventon.
Born on 16 December
1917
Arthur C. Clarke, English science fiction writer (died 2008)
Place of birth: Minehead.
Born on 16 December
1866
Wassily Kandinsky, Russian-French painter and theorist (died 1944)
Place of birth: Moscow.
Born on 16 December
1901
Margaret Mead, American anthropologist and author (died 1978)
Place of birth: Philadelphia.
Born in Britain and Ireland
1899
Noël Coward, English actor, playwright, and composer (died 1973)
Place of birth: Teddington.
Born in Britain and Ireland
1988
Anna Popplewell, English actress
Place of birth: London.
Born in Britain and Ireland
1984
Theo James, English actor
Place of birth: Oxford.
16 December
Number one in the charts that week
At the cinema
An animal recorded that day
The record can be seen in GBIF, which brings together wildlife records from around the world.
All your birthdays
The weather that day
Data: Met Office Hadley Centre (HadCET); NOAA (GHCN-Daily, Mauna Loa).
Above the Earth
Sources: Jonathan McDowell, GCAT (launches); GFZ Potsdam (Kp index). Days are counted in Universal Time.
Football that day
International matches played that day:
Source: the “International football results” dataset kept by Mart Jürisoo (CC0).
Also that day
The earthquake’s page at the USGS
Source: the USGS catalogue. The day is counted in Universal Time (UTC).
In those days
Make a link for someone
Type the name, pick the day and the year of birth. The link opens straight on their day, with their name in the greeting.
The link carries the name, date and place typed here; anyone who gets it can see them.
Put another birthday beside it
Your mother’s, your child’s, a friend’s: the two days appear side by side.
Below: 16 December through the years.
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 16 December
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 16 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.
- 533
The Digest, the great collection of all Roman jurists' law, is issued together with a new official law textbook for legal schools, The Institutes.
no place on the mapWikipedia: Digest - 714
Pepin of Herstal, mayor of the Merovingian palace, dies at Jupille (modern Belgium). He is succeeded by his infant grandson Theudoald, while his widow Plectrude holds actual power in the Frankish Kingdom.
Europe · Jupille-sur-MeuseWikipedia: Pepin of Herstal - 755
An Lushan revolts against Chancellor Yang Guozhong at Yanjing, initiating the An Lushan Rebellion during the Tang dynasty of China.
no place on the mapWikipedia: An Lushan rebellion - 1431
Hundred Years' War: Henry VI of England is crowned King of France at Notre Dame in Paris.
Europe · Notre-Dame de ParisWikipedia: Hundred Years' War - 1497
Vasco da Gama passes the Great Fish River at the southern tip of Africa, where Bartolomeu Dias had previously turned back to Portugal.
no place on the mapWikipedia: Vasco da Gama - 1575
An earthquake with an estimated magnitude of 8.5Mw strikes Valdivia, Chile.
Latin America · 1575 Valdivia earthquakeWikipedia: 1575 Valdivia earthquake - 1598
Seven-Year War: Battle of Noryang: The final battle of the Seven-Year War is fought between the China and the Korean allied forces and Japanese navies, resulting in a decisive allied forces victory.
Asia · Battle of NoryangWikipedia: Battle of Noryang - 1653
English Interregnum: The Protectorate: Oliver Cromwell becomes Lord Protector of the Commonwealth of England, Scotland and Ireland.
Britain & Ireland · Commonwealth of EnglandWikipedia: Interregnum - 1689
Convention Parliament: The Declaration of Right is embodied in the Bill of Rights.
no place on the mapWikipedia: Bill of Rights 1689 - 1707
The most recent eruption of Mount Fuji.
Asia · Hōei eruptionWikipedia: Hōei eruption - 1740
Prussian forces, led by Frederick the Great, moved into the Habsburg region of Silesia, starting the First Silesian War.
Europe · Habsburg monarchyWikipedia: First Silesian War - 1761
Seven Years' War: After a four-month siege, the Russians under Pyotr Rumyantsev take the Prussian fortress of Kołobrzeg.
Europe · Siege of KolbergWikipedia: Siege of Kolberg - 1773
American Revolution: Boston Tea Party: Members of the Sons of Liberty disguised as Mohawk Indians dump hundreds of crates of tea into Boston harbor as a protest against the Tea Act.
North America · Boston Tea PartyWikipedia: American Revolution - 1777
Virginia becomes the first state to ratify the Articles of Confederation.
no place on the mapWikipedia: Articles of Confederation - 1782
British East India Company: Muharram Rebellion: Hada and Mada Miah lead the first anti-British uprising in the subcontinent against Robert Lindsay and his contingents in Sylhet Shahi Eidgah.
Asia · Sylhet Shahi EidgahWikipedia: Muharram Rebellion - 1811
The first two in a series of four severe earthquakes occur in the vicinity of New Madrid, Missouri.
North America · 1811–1812 New Madrid earthquakesWikipedia: 1811–1812 New Madrid earthquakes - 1826
Benjamin W. Edwards rides into Mexican-controlled Nacogdoches, Texas, and declares himself ruler of the Republic of Fredonia.
North America · NacogdochesWikipedia: Fredonian Rebellion - 1838
Great Trek: Battle of Blood River: Voortrekkers led by Andries Pretorius and Sarel Cilliers defeat Zulu impis, led by Dambuza (Nzobo) and Ndlela kaSompisi in what is today KwaZulu-Natal, South Africa.
Africa · Battle of Blood RiverWikipedia: Battle of Blood River - 1850
The Charlotte Jane and the Randolph bring the first of the Canterbury Pilgrims to Lyttelton, New Zealand.
Oceania · Lyttelton, New ZealandWikipedia: Charlotte Jane - 1863
American Civil War: Confederate President Jefferson Davis appoints General Joseph E. Johnston to replace General Braxton Bragg as commander of the Army of Tennessee.
no place on the mapWikipedia: American Civil War - 1864
American Civil War: The Battle of Nashville ends as the Union Army of the Cumberland under General George H. Thomas routs and destroys the Confederate Army of Tennessee under General John Bell Hood, ending its effectiveness as a combat unit.
North America · Battle of NashvilleWikipedia: Battle of Nashville - 1880
Outbreak of the First Boer War between the Boer South African Republic and the British Empire.
no place on the mapWikipedia: First Boer War - 1882
Wales and England contest the first Home Nations (now Six Nations) rugby union match.
no place on the mapWikipedia: Six Nations Championship - 1883
Tonkin Campaign: French forces capture the Sơn Tây citadel.
Asia · Sơn Tây, HanoiWikipedia: Tonkin campaign - 1893
Czech composer Antonín Dvořák's New World Symphony (audio featured) premiered at Carnegie Hall in New York City.
North America · Carnegie HallWikipedia: Antonín Dvořák - 1899
Thousand Days' War: Columbian Liberal rebels repelled a Conservative government attack at the Battle of Peralonso.
no place on the mapWikipedia: Thousand Days' War - 1901
English writer Beatrix Potter privately published 250 copies of The Tale of Peter Rabbit after several publishers' rejections.
no place on the mapWikipedia: Beatrix Potter - 1905
In rugby union, the "Match of the Century" is played between Wales and New Zealand at Cardiff Arms Park.
Britain & Ireland · Cardiff Arms ParkWikipedia: Match of the Century - 1912
First Balkan War: The Royal Hellenic Navy defeats the Ottoman Navy at the Battle of Elli.
Asia · Battle of ElliWikipedia: Battle of Elli - 1914
World War I: Admiral Franz von Hipper commands a raid on Scarborough, Hartlepool and Whitby.
Britain & Ireland · Raid on Scarborough, Hartlepool and WhitbyWikipedia: World War I - 1918
Vincas Mickevičius-Kapsukas declared the formation of the Lithuanian Soviet Socialist Republic, a puppet state created by Soviet Russia to justify the Lithuanian–Soviet War.
no place on the mapWikipedia: Lithuanian–Soviet War - 1920
The Haiyuan earthquake of 8.5Mw rocks the Gansu province in China, killing an estimated 200,000.
Asia · 1920 Haiyuan earthquakeWikipedia: 1920 Haiyuan earthquake - 1922
Gabriel Narutowicz, the first president of Poland, was assassinated only five days after having taken office.
Europe · Assassination of Gabriel NarutowiczWikipedia: Assassination of Gabriel Narutowicz - 1930
German-American gangster Herman Lamm killed himself during a botched robbery attempt in Clinton, Indiana, to avoid being captured by police.
North America · Clinton, IndianaWikipedia: Herman Lamm - 1938
Adolf Hitler instituted the Cross of Honour of the German Mother, an order of merit for German mothers with at least four children.
no place on the mapWikipedia: Adolf Hitler - 1942
The Holocaust: Schutzstaffel chief Heinrich Himmler orders that Roma candidates for extermination be deported to Auschwitz.
Europe · Auschwitz concentration campWikipedia: The Holocaust - 1944
World War II: The Battle of the Bulge begins with the surprise offensive of three German armies through the Ardennes forest.
Europe · Battle of the BulgeWikipedia: World War II - 1951
A Miami Airlines Curtiss C-46 Commando crashes in Elizabeth, New Jersey, killing all 58 aboard including dancer Doris Ruby.
North America · 1951 Miami Airlines C-46 crashWikipedia: 1951 Miami Airlines C-46 crash - 1960
A United Air Lines Douglas DC-8 and a TWA Lockheed Super Constellation collide over Staten Island, New York and crash, killing all 128 people aboard both aircraft and six more on the ground.
North America · 1960 New York mid-air collisionWikipedia: 1960 New York mid-air collision - 1968
Second Vatican Council: Official revocation of the Edict of Expulsion of Jews from Spain.
no place on the mapWikipedia: Alhambra Decree - 1971
Bangladesh Liberation War and Indo-Pakistani War of 1971: The surrender of the Pakistan Army brings an end to both conflicts. This is commemorated annually as Victory Day in Bangladesh and Vijay Diwas in India respectively.
no place on the mapWikipedia: Bangladesh Liberation War - 1971
The United Kingdom recognizes Bahrain's independence, which is commemorated annually as Bahrain's National Day.
Asia · BahrainWikipedia: Bahrain - 1972
The Constitution of the People's Republic of Bangladesh is enacted.
Asia · BangladeshWikipedia: Constitution of Bangladesh - 1973
Aeroflot Flight 2022 crashes in the Soviet Union's (now Russia) Volokolamsky District, killing all 51 aboard, including four Lithuanian doctors.
Europe · Aeroflot Flight 2022Wikipedia: Aeroflot Flight 2022 - 1986
The Jeltoqsan riots erupt in Alma-Ata, Kazakh SSR, in response to Soviet leader Mikhail Gorbachev's dismissal of ethnic Kazakh Dinmukhamed Kunaev, the First Secretary of the Communist Party of Kazakhstan, and his replacement with Gennady Kolbin, an ethnic Russian from the Russian SFSR.
Asia · AlmatyWikipedia: Jeltoqsan - 1989
Romanian Revolution: Protests break out in Timișoara, Romania, in response to an attempt by the government to evict dissident Hungarian pastor László Tőkés.
Europe · BucharestWikipedia: Romanian revolution - 1992
Deportation of Hamas members: Israeli authorities began deporting hundreds of Palestinians suspected to be members of Hamas across the Lebanese border.
no place on the mapWikipedia: 1992 deportation of Hamas members - 1997
Amid an outbreak of bovine spongiform encephalopathy, the British government banned the sale of beef on the bone for human consumption.
no place on the mapWikipedia: United Kingdom BSE outbreak - 1997
Dennō Senshi Porygon: Over 600 kids in Japan suffer photosensitive epileptic seizures after watching an episode of the Pokémon anime.
Asia · JapanWikipedia: Dennō Senshi Porygon - 2011
The Zhanaozen massacre occurs when violent protests by oil workers take place in Zhanaozen, Kazakhstan, resulting in security forces killing at least 14 and injuring 100 more.
Asia · Zhanaozen massacreWikipedia: Zhanaozen massacre - 2012
A woman was gang-raped and fatally assaulted on a bus in Delhi, generating protests across India against inadequate security for women.
Asia · DelhiWikipedia: 2012 Delhi gang rape and murder - 2013
A bus falls from an elevated highway in Manila, capital of the Philippines, killing at least 18 people with 20 injured.
Asia · ManilaWikipedia: 2013 Metro Manila Skyway bus accident - 2014
A hostage crisis in a Lindt chocolate café in Sydney, Australia, ended with police storming the building, killing the perpetrator and one of the hostages.
Oceania · Lindt Cafe siegeWikipedia: Lindt Cafe siege - 2014
Tehrik-i-Taliban Pakistan militants attack an Army Public School in Peshawar, Pakistan, killing 150 people, 132 of them schoolchildren.
Asia · 2014 Peshawar school massacreWikipedia: 2014 Peshawar school massacre - 2022
A landslide occurs at a camp at an organic farm near the town of Batang Kali in Selangor, Malaysia, trapping 92 people and killing 31.
Asia · 2022 Batang Kali landslideWikipedia: 2022 Batang Kali landslide - 2024
The Abundant Life Christian School shooting in Madison, Wisconsin, United States, takes place, resulting in the death of three people.
North America · 2024 Abundant Life Christian School shootingWikipedia: 2024 Abundant Life Christian School shooting
What the other Wikipedias remember
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Spanish and were translated for this page.
- 1966
In New York, the United Nations General Assembly adopts the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights.
North America · New York CityTranslated from the list on Wikipedia in SpanishWikipedia: Pacto Internacional de Derechos Civiles y Políticos
Who was born on 16 December
In order of how many Wikipedia editions have an article about each. The first 60 of 229 are shown.
- 1770
Ludwig van Beethoven, composer (died 1827)
- 1775
Jane Austen, English novelist (died 1817)
SteventonWikipedia: Jane Austen - 1917
Arthur C. Clarke, English science fiction writer (died 2008)
MineheadWikipedia: Arthur C. Clarke - 1866
Wassily Kandinsky, Russian-French painter and theorist (died 1944)
- 1901
Margaret Mead, American anthropologist and author (died 1978)
PhiladelphiaWikipedia: Margaret Mead - 1928
Philip K. Dick, American philosopher and author (died 1982)
ChicagoWikipedia: Philip K. Dick - 1485
Catherine of Aragon, Spanish princess, Queen Consort of England (died 1536)
Alcalá de HenaresWikipedia: Catherine of Aragon - 1863
George Santayana, Spanish philosopher, novelist, and poet (died 1952)
San Bernardo streetWikipedia: George Santayana - 1790
Leopold I of Belgium (died 1865)
- 1988
Mats Hummels, German footballer
Bergisch GladbachWikipedia: Mats Hummels - 1969
Adam Riess, American astrophysicist, astronomer, and academic Nobel Prize laureate
Washington, D.C.Wikipedia: Adam Riess - 1938
Liv Ullmann, Norwegian actress, director, and screenwriter
- 1997
Zara Larsson, Swedish singer and songwriter
Solna MunicipalityWikipedia: Zara Larsson - 1946
Benny Andersson, Swedish singer-songwriter, pianist, and producer
StockholmWikipedia: Benny Andersson - 1872
Anton Denikin, Russian general (died 1947)
- 1742
Gebhard Leberecht von Blücher, German field marshal (died 1819)
- 1888
Alexander I of Yugoslavia (died 1934)
- 1899
Noël Coward, English actor, playwright, and composer (died 1973)
TeddingtonWikipedia: Noël Coward - 1882
Zoltán Kodály, Hungarian composer, conductor, and musicologist (died 1967)
KecskemétWikipedia: Zoltán Kodály - 1834
Léon Walras, French-Swiss economist and theorist (died 1910)
ÉvreuxWikipedia: Léon Walras - 1963
James Mangold, American director, producer, and screenwriter
New York CityWikipedia: James Mangold - 1988
Anna Popplewell, English actress
- 1902
Rafael Alberti, Spanish poet and playwright (died 1999)
El Puerto de Santa MaríaWikipedia: Rafael Alberti - 1961
Bill Hicks, American comedian and musician (died 1994)
ValdostaWikipedia: Bill Hicks - 1981
Krysten Ritter, American actress, musician, and model
BloomsburgWikipedia: Krysten Ritter - 1967
Miranda Otto, Australian actress
BrisbaneWikipedia: Miranda Otto - 1984
Theo James, English actor
OxfordWikipedia: Theo James - 1971
Paul van Dyk, German musician, producer and DJ
EisenhüttenstadtWikipedia: Paul van Dyk - 1963
Benjamin Bratt, American actor and producer
San FranciscoWikipedia: Benjamin Bratt - 1905
Piet Hein, Danish mathematician, author, and poet (died 1996)
CopenhagenWikipedia: Piet Hein - 1993
Jyoti Amge, Indian actress
NagpurWikipedia: Jyoti Amge - 1996
Sergio Reguilón, Spanish footballer
Collado VillalbaWikipedia: Sergio Reguilón - 1996
Wilfred Ndidi, Nigerian footballer
- 1952
Francesco Graziani, Italian footballer and manager
- 1967
Donovan Bailey, Canadian sprinter and sportscaster
Manchester ParishWikipedia: Donovan Bailey - 1776
Johann Wilhelm Ritter, German chemist, physicist, and philosopher (died 1810)
ZamieniceWikipedia: Johann Wilhelm Ritter - 1961
Shane Black, American actor, director, and screenwriter
PittsburghWikipedia: Shane Black - 1964
Heike Drechsler, German sprinter and long jumper
- 1896
Anna Anderson, an imposter who claimed to be Grand Duchess Anastasia of Russia (died 1984)
Borowy LasWikipedia: Anna Anderson - 1908
Remedios Varo, Spanish-Mexican surrealist painter & anarchist (died 1963)
AnglèsWikipedia: Remedios Varo - 1972
Zeljko Kalac, Australian soccer player and manager
SydneyWikipedia: Zeljko Kalac - 1982
Stanislav Šesták, Slovak footballer
DemjataWikipedia: Stanislav Šesták - 1988
Alexey Shved, Russian basketball player
BelgorodWikipedia: Alexey Shved - 1883
Max Linder, French actor, director, producer, and screenwriter (died 1925)
Saint-LoubèsWikipedia: Max Linder - 1714
George Whitefield, English Anglican priest (died 1770)
GloucesterWikipedia: George Whitefield - 1775
François-Adrien Boieldieu, French pianist and composer (died 1834)
- 1937
Edward Ruscha, American painter and photographer
- 1947
Ben Cross, English actor (died 2020)
LondonWikipedia: Ben Cross - 1955
Xander Berkeley, American actor and producer
BrooklynWikipedia: Xander Berkeley - 1977
Sylvain Distin, French footballer
BagnoletWikipedia: Sylvain Distin - 1991
Craig Goodwin, Australian footballer
AdelaideWikipedia: Craig Goodwin - 1992
Tom Rogic, Australian footballer
GriffithWikipedia: Tom Rogic - 1926
A. N. R. Robinson, Tobagonian lawyer and politician, 3rd President of Trinidad and Tobago (died 2014)
ScarboroughWikipedia: A. N. R. Robinson - 1949
Billy Gibbons, American singer-songwriter, guitarist, and producer
HoustonWikipedia: Billy Gibbons - 1932
Quentin Blake, English author and illustrator
SidcupWikipedia: Quentin Blake - 1965
J. B. Smoove, American comedian, writer, and actor
PlymouthWikipedia: J. B. Smoove - 1982
Anna Sedokova, Ukrainian singer, actress and television presenter
- 1943
Steven Bochco, American television writer and producer (died 2018)
New York CityWikipedia: Steven Bochco - 1955
Prince Lorenz of Belgium, Archduke of Austria-Este
Boulogne-BillancourtWikipedia: Prince Lorenz of Belgium - 1959
Alexander Lebedev, Russian businessman and politician
What is celebrated on 16 December
- Christian feast day: Adelaide of Italy
- Christian feast day: Haggai
- Christian feast day: Blessed Marianna Fontanella
- Christian feast day: Blessed Philip Siphong Onphitak
- Christian feast day: Ralph Adams Cram, Richard Upjohn and John La Farge (Episcopal Church (USA))
- Christian feast day: December 16 (Eastern Orthodox liturgics)
- Day of Reconciliation, formerly celebrated as Day of the Vow by the Afrikaners (South Africa)
- Independence Day, celebrates the independence of Kazakhstan from the Soviet Union in 1991.
- National Day, celebrates the withdrawal of United Kingdom from Bahrain, making Bahrain an independent emirate in 1971.
- International Day of the Belt and Road Initiative
- National Sports Day (Thailand)
- Victory Day observances, celebration of the Indo-Bangla allied victory over Pakistan armed forces and the Liberation of Bangladesh. (Bangladesh and India[a])
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.
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
- Events, births and holidays: the day’s page on Wikipedia, text under CC BY-SA 4.0.
- Coordinates, places of birth and the number of editions: Wikidata (CC0).
- The Earth by day: NASA Blue Marble Next Generation. The Earth by night: NASA Black Marble 2016.
- Borders and regions: Natural Earth.
- World population and births per year: UN World Population Prospects 2024.
- Charts and films: Wikipedia’s lists for Billboard, the UK Singles Chart, Los 40 Principales, Romanian Top 100, Airplay 100 and American films by year (CC BY-SA 4.0).
- Weather: Met Office Hadley Centre, HadCET (Open Government Licence) and NOAA GHCN-Daily, New York Central Park. Carbon dioxide: NOAA Global Monitoring Laboratory, Mauna Loa.
- Earthquakes: the USGS catalogue. Launches: Jonathan McDowell, GCAT (CC BY). Kp index: GFZ Potsdam (CC BY 4.0). Matches: International football results, Mart Jürisoo (CC0).
- Animal observations: GBIF, with a link to each record; species names come from Wikidata.