A birthday on the globe
29 September on the globe: what happened in the world on this day, and who was born
For 29 September, the English Wikipedia lists 67 events and 239 births. 35 of the events stand at their places as rays of light; four 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 29 September through the years
The Earth on 29 September
The picture on the globe was assembled by NASA from satellite photographs taken in September 2004: the snow, the ice and the green are those of the month.
On 29 September the Sun passes straight overhead at noon along the parallel of 2.4° south. In London, the day lasts about 11 hours 45 minutes.
Beyond 88° south the Sun no longer sets; beyond 88° 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 · Montgomery
1267
The Treaty of Montgomery recognises Llywelyn ap Gruffudd as Prince of Wales, but only as a vassal of King Henry III.
On the map: Montgomery.
Britain & Ireland · Blackpool
1885
The first practical public electric tramway in the world is opened in Blackpool, England.
On the map: Blackpool.
Also on the day’s list of Wikipedia in Romanian.
Britain & Ireland · University of East Anglia
1963
The University of East Anglia (coat of arms featured) was founded in Norwich, England, after talk of establishing a university in the city began as early as the 19th century.
On the map: University of East Anglia.
Also on the day’s list of Wikipedia in Chinese.
Europe · Lisbon
1864
The Treaty of Lisbon defines the boundaries between Spain and Portugal and abolishes the Couto Misto microstate.
On the map: Lisbon.
Also on the day’s list of Wikipedia in Spanish.
Europe · Tampere Hall
1990
The Tampere Hall, the largest concert and congress center in the Nordic countries, is inaugurated in Tampere, Finland.
On the map: Tampere Hall.
Asia · Port of Iloilo
1855
The Philippine port of Iloilo is opened to world trade by the Spanish administration.
On the map: Port of Iloilo.
Asia · Fort Tanjong Katong
2004
Archaeologists and volunteers began excavation of the remains of Fort Tanjong Katong in Singapore.
On the map: Fort Tanjong Katong.
Latin America · Tegucigalpa
1578
Tegucigalpa, capital city of Honduras, is claimed by the Spaniards.
On the map: Tegucigalpa.
Also on the day’s list of Wikipedia in Spanish.
North America · Williamsburg Bray School
1760
The Williamsburg Bray School, the oldest-surviving school building in the U.S. dedicated to educating Black children, opened at Benjamin Franklin's suggestion.
On the map: Williamsburg Bray School.
North America · Washington National Cathedral
1907
The cornerstone is laid at the Cathedral Church of Saint Peter and Saint Paul (better known as Washington National Cathedral) in Washington, D.C.
On the map: Washington National Cathedral.
North America · Washington National Cathedral
1990
Construction of the Cathedral Church of Saint Peter and Saint Paul (better known as Washington National Cathedral) is completed in Washington, D.C.
On the map: Washington National Cathedral.
29 September
Born on 29 September#
The English Wikipedia lists 239 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.
Born on 29 September
1547
Miguel de Cervantes, Spanish novelist, poet, and playwright (died 1616)
Place of birth: Alcalá de Henares.
Born on 29 September
1901
Enrico Fermi, Italian-American physicist and academic, Nobel Prize laureate (died 1954)
Place of birth: Rome.
Born on 29 September
1864
Miguel de Unamuno, Spanish philosopher and author (died 1936)
Born on 29 September
1912
Michelangelo Antonioni, Italian director and screenwriter (died 2007)
Place of birth: Ferrara.
Born in Britain and Ireland
1810
Elizabeth Gaskell, English author (died 1865)
Place of birth: Cheyne Walk.
Born in Britain and Ireland
1904
Greer Garson, English-American actress (died 1996)
Place of birth: London.
Born in Britain and Ireland
1920
Peter D. Mitchell, English biochemist and academic, Nobel Prize laureate (died 1992)
Place of birth: Surrey.
29 September
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: 29 September 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 29 September
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 28 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.
- 61 BC
Pompey the Great celebrates his third triumph for victories over the pirates and the end of the Mithridatic Wars on his 45th birthday.
no place on the mapWikipedia: Mithridatic Wars - 440
Consecration of pope Leo I, later called Leo the Great, following the death of pope Sixtus III in the month before.
no place on the mapWikipedia: Pope Leo I - 855
Pope Benedict III is restored by a popular uprising to the papacy after king Louis II of Italy tried to replace him with his favourite candidate.
no place on the mapWikipedia: Pope Benedict III - 1011
Danes capture Canterbury after a siege, taking Ælfheah, archbishop of Canterbury, as a prisoner.
Britain & Ireland · Siege of CanterburyWikipedia: Siege of Canterbury - 1227
Frederick II, Holy Roman Emperor, is excommunicated by Pope Gregory IX for his failure to participate in the Crusades during the Investiture Controversy.
no place on the mapWikipedia: Investiture Controversy - 1267
The Treaty of Montgomery recognises Llywelyn ap Gruffudd as Prince of Wales, but only as a vassal of King Henry III.
Britain & Ireland · MontgomeryWikipedia: Treaty of Montgomery - 1364
During the Hundred Years' War, Anglo-Breton forces defeat the Franco-Breton army in Brittany, ending the War of the Breton Succession.
Europe · Battle of AurayWikipedia: Battle of Auray - 1567
During the French War of Religion, Protestant coup officials in Nîmes massacre Catholic priests in an event now known as the Michelade.
Europe · NîmesWikipedia: French Wars of Religion - 1578
Tegucigalpa, capital city of Honduras, is claimed by the Spaniards.
Latin America · TegucigalpaWikipedia: Tegucigalpa - 1669
Michał Korybut Wiśniowiecki is crowned king following the 1669 Polish–Lithuanian royal election.
no place on the mapWikipedia: 1669 Polish–Lithuanian royal election - 1714
The Cossacks of the Tsardom of Russia kill about 800 people overnight in Hailuoto during the Great Wrath.
Europe · HailuotoWikipedia: Murder Friday - 1717
An earthquake strikes Antigua Guatemala, destroying much of the city's architecture.
Latin America · 1717 Guatemala earthquakeWikipedia: 1717 Guatemala earthquake - 1724
J. S. Bach leads the first performance of Herr Gott, dich loben alle wir, BWV 130 for the feast of archangel Michael, based on Paul Eber's hymn in twelve stanzas.
no place on the mapWikipedia: Johann Sebastian Bach - 1726
J. S. Bach leads the first performance of Es erhub sich ein Streit, BWV 130, for the feast of Michael, the archangel.
no place on the mapWikipedia: Johann Sebastian Bach - 1760
The Williamsburg Bray School, the oldest-surviving school building in the U.S. dedicated to educating Black children, opened at Benjamin Franklin's suggestion.
North America · Williamsburg Bray SchoolWikipedia: Williamsburg Bray School - 1789
The United States Department of War first establishes a regular army with a strength of several hundred men.
no place on the mapWikipedia: United States Department of War - 1829
The Metropolitan Police of London, later also known as the Met, is founded.
no place on the mapWikipedia: Metropolitan Police - 1833
The Spanish American wars of independence ended with the death of King Ferdinand VII, with what had once been the Spanish Empire disintegrating into independent Latin American states.
Europe · Spanish EmpireWikipedia: Spanish American wars of independence - 1848
The Battle of Pákozd is a stalemate between Hungarian and Croatian forces and is the first battle of the Hungarian Revolution.
Europe · PákozdWikipedia: Battle of Pákozd - 1850
The papal bull Universalis Ecclesiae restores the Roman Catholic hierarchy in England and Wales.
no place on the mapWikipedia: Universalis Ecclesiae - 1855
The Philippine port of Iloilo is opened to world trade by the Spanish administration.
Asia · Port of IloiloWikipedia: Port of Iloilo - 1864
The Battle of Chaffin's Farm is fought in the American Civil War.
North America · Battle of Chaffin's FarmWikipedia: Battle of Chaffin's Farm - 1864
The Treaty of Lisbon defines the boundaries between Spain and Portugal and abolishes the Couto Misto microstate.
Europe · LisbonWikipedia: Treaty of Lisbon - 1885
The first practical public electric tramway in the world is opened in Blackpool, England.
Britain & Ireland · BlackpoolWikipedia: Blackpool Tramway - 1907
The cornerstone is laid at the Cathedral Church of Saint Peter and Saint Paul (better known as Washington National Cathedral) in Washington, D.C.
North America · Washington National CathedralWikipedia: Washington National Cathedral - 1911
Italy declares war on the Ottoman Empire, In this war , Italy gains Libya which ends Ottoman rule in North Africa .
Asia · Ottoman EmpireWikipedia: Italo-Turkish War - 1918
World War I: Bulgaria signs the Armistice of Salonica ending its participation.
no place on the mapWikipedia: World War I - 1918
World War I: Germany's Supreme Army Command tells Kaiser Wilhelm II and Imperial Chancellor Georg Michaelis to open negotiations for an armistice to end the war.
Europe · Armistice of 11 November 1918Wikipedia: Armistice of 11 November 1918 - 1918
World War I: The Hindenburg Line is broken by an Allied attack.
Europe · Battle of St Quentin CanalWikipedia: Battle of St Quentin Canal - 1920
Ukrainian War of Independence: The Ukrainian Soviet Socialist Republic agree to a truce with the Makhnovshchina.
no place on the mapWikipedia: Ukrainian War of Independence - 1923
The First American Track and Field championships for women are held.
North America · NewarkWikipedia: 1923 USA Outdoor Track and Field Championships - 1923
The Mandate for Palestine takes effect, creating Mandatory Palestine.
Asia · Mandatory PalestineWikipedia: Mandate for Palestine - 1923
The Mandate for Syria and Lebanon takes effect.
Asia · Mandate for Syria and the LebanonWikipedia: Mandate for Syria and the Lebanon - 1932
Last day of the Battle of Boquerón between Paraguay and Bolivia during the Chaco War.
Latin America · Battle of BoquerónWikipedia: Battle of Boquerón - 1940
Two Avro Ansons collide in mid-air over New South Wales, Australia, remain locked together, then land safely.
Oceania · 1940 Brocklesby mid-air collisionWikipedia: 1940 Brocklesby mid-air collision - 1941
During World War II, German forces, with the aid of local Ukrainian collaborators, begin the two-day Babi Yar massacre.
Europe · Babi YarWikipedia: Babi Yar - 1954
The convention establishing CERN (the European Organization for Nuclear Research) is signed.
no place on the mapWikipedia: CERN - 1954
Willie Mays of the New York Giants made The Catch, one of the most famous defensive plays in the history of Major League Baseball.
no place on the mapWikipedia: Willie Mays - 1955
The first Indonesian legislative election resulted in an unexpectedly poor result for the Masyumi Party of incumbent prime minister Burhanuddin Harahap.
no place on the mapWikipedia: 1955 Indonesian legislative election - 1957
The Kyshtym disaster is the third-worst nuclear accident ever recorded.
Asia · Kyshtym disasterWikipedia: Kyshtym disaster - 1959
A Lockheed L-188 Electra crashes in Buffalo, Texas, killing 34 people.
North America · Buffalo, TexasWikipedia: Braniff Airways Flight 542 - 1963
The University of East Anglia (coat of arms featured) was founded in Norwich, England, after talk of establishing a university in the city began as early as the 19th century.
Britain & Ireland · University of East AngliaWikipedia: University of East Anglia - 1964
Mafalda, a popular comic strip by Quino, was first published in newspapers in Argentina.
no place on the mapWikipedia: Mafalda - 1971
Oman joins the Arab League.
no place on the mapWikipedia: Arab League - 1972
Japan establishes diplomatic relations with the People's Republic of China after breaking official ties with the Republic of China.
no place on the mapWikipedia: Japan - 1975
WGPR becomes the first black-owned-and-operated television station in the US.
no place on the mapWikipedia: WWJ-TV - 1979
Equatorial Guinean dictator Francisco Macías Nguema is executed by soldiers from Western Sahara.
no place on the mapWikipedia: Equatorial Guinea - 1981
An Iranian Air Force Lockheed C-130 Hercules military transport aircraft crashes into a firing range near Kahrizak, Iran, killing 80 people.
Asia · 1981 Iranian Air Force C-130 crashWikipedia: 1981 Iranian Air Force C-130 crash - 1988
NASA launches STS-26, the first Space Shuttle mission since the Challenger disaster.
North America · Space Shuttle Challenger disasterWikipedia: Space Shuttle Challenger disaster - 1990
Construction of the Cathedral Church of Saint Peter and Saint Paul (better known as Washington National Cathedral) is completed in Washington, D.C.
North America · Washington National CathedralWikipedia: Washington National Cathedral - 1990
The Tampere Hall, the largest concert and congress center in the Nordic countries, is inaugurated in Tampere, Finland.
Europe · Tampere HallWikipedia: Tampere Hall - 1990
The YF-22, which would later become the F-22 Raptor, flies for the first time.
no place on the mapWikipedia: Lockheed YF-22 - 1991
A Haitian coup d'état occurs.
Latin America · 1991 Haitian coup d'étatWikipedia: 1991 Haitian coup d'état - 1991
The award-winning Disney animated film Beauty and the Beast premiered while unfinished at the New York Film Festival.
no place on the mapWikipedia: New York Film Festival - 1992
Brazilian President Fernando Collor de Mello is impeached.
no place on the mapWikipedia: Fernando Collor de Mello - 2004
Archaeologists and volunteers began excavation of the remains of Fort Tanjong Katong in Singapore.
Asia · Fort Tanjong KatongWikipedia: Fort Tanjong Katong - 2004
Burt Rutan's Ansari SpaceShipOne performs a successful spaceflight, the first of two required to win the Ansari X Prize.
no place on the mapWikipedia: Burt Rutan - 2004
The asteroid 4179 Toutatis passes within four lunar distances of Earth.
no place on the mapWikipedia: 4179 Toutatis - 2005
John Roberts is confirmed as Chief Justice of the United States.
no place on the mapWikipedia: John Roberts - 2006
A Boeing 737 and an Embraer 600 collide in mid-air, killing 154 people and triggering a Brazilian aviation crisis.
Latin America · Gol Transportes Aéreos Flight 1907Wikipedia: Gol Transportes Aéreos Flight 1907 - 2007
Calder Hall, the world's first commercial nuclear power station, is demolished in a controlled explosion.
Britain & Ireland · Calder Hall nuclear power stationWikipedia: Calder Hall nuclear power station - 2008
The stock market crashes with the Dow Jones dropping a then record 778 points after the United States House of Representatives vote on the Emergency Economic Stabilization Act fails during the beginning stages of the Great Recession.
no place on the mapWikipedia: Emergency Economic Stabilization Act of 2008 - 2009
The 8.1 Mw Samoa earthquake results in a tsunami that kills over 189 and injures hundreds.
Oceania · 2009 Samoa earthquake and tsunamiWikipedia: 2009 Samoa earthquake and tsunami - 2011
The special court in India convicted all 269 accused officials for atrocity on Dalits and 17 for rape in the Vachathi case.
Asia · Vachathi caseWikipedia: Vachathi case - 2013
Over 42 people are killed by members of Boko Haram at the College of Agriculture in Nigeria.
Africa · Gujba college massacreWikipedia: Gujba college massacre - 2016
Eleven days after the Uri attack, the Indian Army conducts "surgical strikes" against suspected militants in Pakistani-administered Kashmir.
Asia · 2016 Uri attackWikipedia: 2016 Uri attack - 2019
Violence and low turnout mar the 2019 Afghan presidential election.
no place on the mapWikipedia: 2019 Afghan presidential election
Who was born on 29 September
In order of how many Wikipedia editions have an article about each. The first 60 of 239 are shown.
- 1547
Miguel de Cervantes, Spanish novelist, poet, and playwright (died 1616)
Alcalá de HenaresWikipedia: Miguel de Cervantes - 1943
Lech Wałęsa, Polish electrician and politician, 2nd President of Poland, Nobel Prize laureate
PopowoWikipedia: Lech Wałęsa - 1901
Enrico Fermi, Italian-American physicist and academic, Nobel Prize laureate (died 1954)
- 1936
Silvio Berlusconi, Italian businessman and politician, Prime Minister of Italy (died 2023)
- 1951
Michelle Bachelet, Chilean politician, President of Chile
La CisternaWikipedia: Michelle Bachelet - 1961
Julia Gillard, Welsh-Australian lawyer and politician, 27th Prime Minister of Australia
- 1758
Horatio Nelson, 1st Viscount Nelson, English admiral (died 1805)
Burnham ThorpeWikipedia: Horatio Nelson, 1st Viscount Nelson - 106 BC
Pompey, Roman general and politician (died 48 BC)
ItalyWikipedia: Pompey - 1864
Miguel de Unamuno, Spanish philosopher and author (died 1936)
- 1942
Ian McShane, English actor
BlackburnWikipedia: Ian McShane - 1912
Michelangelo Antonioni, Italian director and screenwriter (died 2007)
- 1881
Ludwig von Mises, Austrian-American economist, sociologist, and philosopher (died 1973)
- 1959
Jon Fosse, Norwegian author and dramatist
Haugesund MunicipalityWikipedia: Jon Fosse - 1931
Anita Ekberg, Swedish-Italian model and actress (died 2015)
- 1988
Kevin Durant, American basketball player
SuitlandWikipedia: Kevin Durant - 1810
Elizabeth Gaskell, English author (died 1865)
Cheyne WalkWikipedia: Elizabeth Gaskell - 1511
Michael Servetus, Spanish physician, cartographer, and theologian (died 1553)
- 1966
Bujar Nishani, Albanian politician, 7th President of Albania (died 2022)
DurrësWikipedia: Bujar Nishani - 1984
Per Mertesacker, German footballer
HanoverWikipedia: Per Mertesacker - 1931
James Cronin, American physicist and academic, Nobel Prize laureate (died 2016)
ChicagoWikipedia: James Cronin - 1933
Samora Machel, Mozambican commander and politician, 1st President of Mozambique (died 1986)
Gaza ProvinceWikipedia: Samora Machel - 1935
Jerry Lee Lewis, American singer-songwriter and pianist (died 2022)
FerridayWikipedia: Jerry Lee Lewis - 1956
Sebastian Coe, English sprinter and politician
LondonWikipedia: Sebastian Coe - 1703
François Boucher, French painter and set designer (died 1770)
- 1904
Greer Garson, English-American actress (died 1996)
LondonWikipedia: Greer Garson - 1899
László Bíró, Hungarian-Argentinian journalist and inventor, invented the ballpoint pen (died 1985)
BudapestWikipedia: László Bíró - 1920
Peter D. Mitchell, English biochemist and academic, Nobel Prize laureate (died 1992)
- 1994
Halsey, American singer
EdisonWikipedia: Halsey - 1725
Robert Clive, English general and politician, first Governor General of the Bengal Presidency (died 1774)
Kingdom of Great BritainWikipedia: Robert Clive - 1866
Mykhailo Hrushevskyi, Ukrainian historian, academic, and politician (died 1934)
- 1938
Wim Kok, Dutch union leader and politician, Prime Minister of the Netherlands (died 2018)
BergambachtWikipedia: Wim Kok - 1898
Trofim Lysenko, Ukrainian-Russian biologist and agronomist (died 1976)
KarlivkaWikipedia: Trofim Lysenko - 1910
Diosdado Macapagal, Philippine politician, 9th President of the Philippines (died 1997)
- 1980
Zachary Levi, American actor and singer
Lake CharlesWikipedia: Zachary Levi - 1786
Guadalupe Victoria, Mexican general and politician (died 1843)
Tamazula de VictoriaWikipedia: Guadalupe Victoria - 1913
Stanley Kramer, American director and producer (died 2001)
BrooklynWikipedia: Stanley Kramer - 1907
Gene Autry, American singer, actor, and businessman (died 1998)
- 1903
Miguel Alemán Valdés, Mexican lawyer and civilian politician, 46th President of Mexico (died 1983)
Sayula de AlemánWikipedia: Miguel Alemán Valdés - 1913
Trevor Howard, English actor (died 1988)
CliftonvilleWikipedia: Trevor Howard - 1932
Robert Benton, American director, producer, and screenwriter (died 2025)
DallasWikipedia: Robert Benton - 1942
Bill Nelson, American politician
- 1843
Mikhail Skobelev, Russian general (died 1882)
Peter and Paul FortressWikipedia: Mikhail Skobelev - 1934
Mihaly Csikszentmihalyi, Hungarian-American psychologist and academic (died 2021)
- 1942
Felice Gimondi, Italian cyclist (died 2019)
SedrinaWikipedia: Felice Gimondi - 1969
Erika Eleniak, American model and actress
GlendaleWikipedia: Erika Eleniak - 1994
Nicholas Galitzine, English actor
HammersmithWikipedia: Nicholas Galitzine - 1951
Pier Luigi Bersani, Italian educator and politician, 6th President of Emilia-Romagna
- 1803
Jacques Charles François Sturm, French mathematician and theorist (died 1850)
- 1942
Madeline Kahn, American actress and singer (died 1999)
- 1948
Theo Jörgensmann, German clarinet player and composer (died 2025)
BottropWikipedia: Theo Jörgensmann - 1922
Lizabeth Scott, American actress (died 2015)
ScrantonWikipedia: Lizabeth Scott - 1766
Charlotte, Princess Royal of England (died 1828)
Buckingham PalaceWikipedia: Charlotte, Princess Royal - 1930
Colin Dexter, English author and educator (died 2017)
StamfordWikipedia: Colin Dexter - 1937
Kōichirō Matsuura, Japanese diplomat
ShinagawaWikipedia: Kōichirō Matsuura - 1939
Rhodri Morgan, Welsh politician, 2nd First Minister of Wales (died 2017)
CardiffWikipedia: Rhodri Morgan - 1970
Russell Peters, Canadian comedian, actor, and producer
TorontoWikipedia: Russell Peters - 1863
Hugo Haase, German lawyer, jurist, and politician (died 1919)
OlsztynWikipedia: Hugo Haase - 1941
Jon Brower Minnoch, famous for being the world's heaviest person recorded (died 1983)
Bainbridge IslandWikipedia: Jon Brower Minnoch - 1995
Sasha Lane, American actress
HoustonWikipedia: Sasha Lane - 1548
William V, Duke of Bavaria (died 1626)
LandshutWikipedia: William V of Bavaria
What is celebrated on 29 September
- Christian feast day: Charles, Duke of Brittany
- Christian feast day: Cyriacus the Anchorite
- Christian feast day: Hripsime
- Christian feast day: Blessed Francesc de Paula Castelló Aleu
- Christian feast day: Guillaume Courtet
- Christian feast day: Jean de Montmirail
- Christian feast day: John of Dukla
- Christian feast day: René Goupil
- Christian feast day: Theodota of Philippi
- Christian feast day: September 29 (Eastern Orthodox liturgics)
- Christian feast day: the Archangels Michael, Gabriel, and Raphael. One of the four quarter days in the Irish calendar. (England and Ireland). Called Michaelmas in some western liturgical traditions.
- Inventors' Day (Argentina)
- Victory of Boquerón Day (Paraguay)
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.