A birthday on the globe
9 August on the globe: what happened in the world on this day, and who was born
For 9 August, the English Wikipedia lists 53 events and 233 births. 32 of the events stand at their places as rays of light; two 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 9 August through the years
The Earth on 9 August
The picture on the globe was assembled by NASA from satellite photographs taken in August 2004: the snow, the ice and the green are those of the month.
On 9 August the Sun passes straight overhead at noon along the parallel of 15.8° north. In London, the day lasts about 15 hours.
Beyond 74° north the Sun no longer sets; beyond 74° 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.
Britain & Ireland · Westminster Abbey
1902
Edward VII and Alexandra of Denmark are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
On the map: Westminster Abbey.
Britain & Ireland · Brownsea Island Scout camp
1907
The first Boy Scout encampment concludes at Brownsea Island in southern England.
On the map: Brownsea Island Scout camp.
Europe · Pisa Cathedral
1173
Construction of the campanile of the Cathedral of Pisa (now known as the Leaning Tower of Pisa) begins; it will take two centuries to complete.
On the map: Pisa Cathedral.
Also on the day’s list of Wikipedia in Spanish, Romanian and Chinese.
Europe · Zurich
1897
The first International Congress of Mathematicians is held in Zürich, Switzerland.
On the map: Zurich.
Also on the day’s list of Wikipedia in Romanian and Chinese.
Oceania · Raʻiātea
1821
A statue of the Polynesian god A'a was presented to members of the London Missionary Society on the south Pacific island of Ra'iatea.
On the map: Raʻiātea.
9 August
What the other Wikipedias remember#
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Romanian and Spanish and were translated for this page.
From Wikipedia in Romanian · Sistine Chapel
1483
The Sistine Chapel in Rome is opened, with the celebration of a Mass.
On the map: Sistine Chapel.
Translated from the list on Wikipedia in Romanian.
From Wikipedia in Spanish · 1992 Summer Olympics
1992
The closing ceremony of the Barcelona 1992 Olympic Games takes place.
On the map: 1992 Summer Olympics.
Translated from the list on Wikipedia in Spanish.
The article on Wikipedia in Spanish: Juegos Olímpicos de Barcelona 1992
9 August
Born on 9 August#
The English Wikipedia lists 233 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 9 August
1963
Whitney Houston, American singer-songwriter, producer, and actress (died 2012)
Place of birth: Newark.
Born on 9 August
1896
Jean Piaget, Swiss psychologist and philosopher (died 1980)
Place of birth: Neuchâtel.
Born on 9 August
1968
Gillian Anderson, American-British actress, activist and writer
Place of birth: Chicago.
Born on 9 August
1776
Amedeo Avogadro, Italian physicist and chemist (died 1856)
Place of birth: Turin.
Born on 9 August
1914
Tove Jansson, Finnish author and illustrator (died 2001)
Place of birth: Helsinki.
Born in Britain and Ireland
1947
Roy Hodgson, English footballer and manager
Place of birth: Croydon.
Born in Britain and Ireland
1922
Philip Larkin, English poet and novelist (died 1985)
Place of birth: Coventry.
Born in Britain and Ireland
1927
Robert Shaw, English actor and screenwriter (died 1978)
Place of birth: Westhoughton.
9 August
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: 9 August 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 9 August
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 19 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.
- 48 BC
Caesar's Civil War: Battle of Pharsalus: Julius Caesar decisively defeats Pompey at Pharsalus and Pompey flees to Egypt.
Europe · Battle of PharsalusWikipedia: Battle of Pharsalus - 378
Gothic War: Battle of Adrianople: A large Roman army led by Emperor Valens is defeated by the Visigoths. Valens is killed along with over half of his army.
Asia · Battle of AdrianopleWikipedia: Battle of Adrianople - 1173
Construction of the campanile of the Cathedral of Pisa (now known as the Leaning Tower of Pisa) begins; it will take two centuries to complete.
Europe · Pisa CathedralWikipedia: Bell tower - 1329
Quilon, the first Indian Christian Diocese, is erected by Pope John XXII; the French-born Jordanus is appointed the first Bishop.
no place on the mapWikipedia: Diocese of Quilon - 1500
Ottoman–Venetian War (1499–1503): The Ottomans capture Methoni, Messenia.
Europe · Methoni, MesseniaWikipedia: Ottoman–Venetian War - 1610
The First Anglo-Powhatan War begins in colonial Virginia.
North America · Colony of VirginiaWikipedia: Anglo-Powhatan Wars - 1638
An army under Bernard of Saxe-Weimar defeats imperial troops at the battle of Wittenweiher.
Europe · Battle of WittenweiherWikipedia: Battle of Wittenweiher - 1810
Napoleon annexes Westphalia as part of the First French Empire.
Europe · First French EmpireWikipedia: Napoleon - 1814
American Indian Wars: The Creek sign the Treaty of Fort Jackson, giving up huge parts of Alabama and Georgia.
North America · Fort ToulouseWikipedia: Treaty of Fort Jackson - 1821
A statue of the Polynesian god A'a was presented to members of the London Missionary Society on the south Pacific island of Ra'iatea.
Oceania · RaʻiāteaWikipedia: Statue of A'a from Rurutu - 1830
Louis Philippe becomes the king of the French following abdication of Charles X.
no place on the mapWikipedia: Louis Philippe I - 1842
The Webster–Ashburton Treaty is signed, establishing the United States–Canada border east of the Rocky Mountains.
no place on the mapWikipedia: Webster–Ashburton Treaty - 1854
American Transcendentalist philosopher Henry David Thoreau publishes his memoir Walden.
no place on the mapWikipedia: Transcendentalism - 1855
Åland War: The Battle of Suomenlinna begins.
Europe · Bombardment of SveaborgWikipedia: Åland War - 1862
American Civil War: Battle of Cedar Mountain: At Cedar Mountain, Virginia, Confederate General Stonewall Jackson narrowly defeats Union forces under General John Pope.
North America · Battle of Cedar MountainWikipedia: American Civil War - 1877
American Indian Wars: Battle of the Big Hole: A small band of Nez Percé Indians clash with the United States Army.
North America · Battle of the Big HoleWikipedia: Battle of the Big Hole - 1892
Thomas Edison receives a patent for a two-way telegraph.
no place on the mapWikipedia: Thomas Edison - 1897
The first International Congress of Mathematicians is held in Zürich, Switzerland.
Europe · ZurichWikipedia: International Congress of Mathematicians - 1902
Edward VII and Alexandra of Denmark are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
Britain & Ireland · Westminster AbbeyWikipedia: Coronation of Edward VII and Alexandra - 1907
The first Boy Scout encampment concludes at Brownsea Island in southern England.
Britain & Ireland · Brownsea Island Scout campWikipedia: Scouting - 1925
A train robbery takes place in Kakori, near Lucknow, India, by the Indian independence revolutionaries, against the British government.
Asia · KakoriWikipedia: Kakori conspiracy - 1934
The Blue Lotus, the fifth volume of The Adventures of Tintin by the Belgian cartoonist Hergé and noted for its emphasis on countering negative misconceptions of Chinese people, began serialisation.
no place on the mapWikipedia: The Blue Lotus - 1936
Summer Olympics: Jesse Owens wins his fourth gold medal at the games.
no place on the mapWikipedia: 1936 Summer Olympics - 1942
Dmitri Shostakovich's 7th symphony premieres in a besieged Leningrad.
Europe · Saint PetersburgWikipedia: Leningrad première of Shostakovich's Symphony No. 7 - 1942
World War II: Battle of Savo Island: Allied naval forces protecting their amphibious forces during the initial stages of the Battle of Guadalcanal are surprised and defeated by an Imperial Japanese Navy cruiser force.
Oceania · Battle of Savo IslandWikipedia: Battle of Savo Island - 1944
The United States Forest Service and the Wartime Advertising Council release posters featuring Smokey Bear for the first time.
no place on the mapWikipedia: United States Forest Service - 1944
World War II: Continuation War: The Vyborg–Petrozavodsk Offensive, the largest offensive launched by Soviet Union against Finland during the Second World War, ends to a strategic stalemate. Both Finnish and Soviet troops at the Finnish front dig to defensive positions, and the front remains stable until the end of the war.
no place on the mapWikipedia: Continuation War - 1945
World War II: Nagasaki is devastated when an atomic bomb, Fat Man, is dropped by the United States B-29 Bockscar. Thirty-five thousand people are killed outright, including 23,200–28,200 Japanese war workers, 2,000 Korean forced workers, and 150 Japanese soldiers.
Asia · Atomic bombings of Hiroshima and NagasakiWikipedia: Atomic bombings of Hiroshima and Nagasaki - 1945
World War II: The Red Army invades Japanese-occupied Manchuria.
Asia · Soviet invasion of ManchuriaWikipedia: Red Army - 1956
About 20,000 women marched on Pretoria, South Africa, to protest the introduction of pass laws for black women under apartheid.
Africa · Union BuildingsWikipedia: Women's March - 1960
South Kasai secedes from the Congo.
no place on the mapWikipedia: South Kasai - 1965
The State of Singapore separates from the Malaysian federation due to a heated ideological conflict between their ruling parties.
Asia · Kuala LumpurWikipedia: Independence of Singapore Agreement 1965 - 1969
Tate–LaBianca murders: Followers of Charles Manson murder pregnant actress Sharon Tate (wife of Roman Polanski), coffee heiress Abigail Folger, Polish actor Wojciech Frykowski, men's hairstylist Jay Sebring and recent high-school graduate Steven Parent.
North America · Tate–LaBianca murdersWikipedia: Tate–LaBianca murders - 1970
LANSA Flight 502 crashes after takeoff from Alejandro Velasco Astete International Airport in Cusco, Peru, killing 99 of the 100 people on board, as well as two people on the ground.
Latin America · LANSA Flight 502Wikipedia: LANSA Flight 502 - 1971
The Troubles: In Northern Ireland, the British authorities launch Operation Demetrius. The operation involves the mass arrest and internment without trial of individuals suspected of being affiliated with the Irish Republican Army (PIRA). Mass riots follow, and thousands of people flee or are forced out of their homes.
Britain & Ireland · Northern IrelandWikipedia: The Troubles - 1973
Mars 7 is launched from the USSR.
no place on the mapWikipedia: Mars 7 - 1974
As a direct result of the Watergate scandal, Richard Nixon becomes the first president of the United States to resign from office. Vice President Gerald Ford becomes president.
no place on the mapWikipedia: Watergate scandal - 1979
Female workers of YH Trading in South Korea hold a sit-in protest in response to the company's unilateral shutdown.
no place on the mapWikipedia: YH incident - 1988
Wayne Gretzky was traded from the Edmonton Oilers to the Los Angeles Kings in one of the most controversial player transactions in ice hockey history.
no place on the mapWikipedia: Edmonton Oilers - 1991
The Italian prosecuting magistrate Antonino Scopelliti is murdered by the 'Ndrangheta on behalf of the Sicilian Mafia while preparing the government's case in the final appeal of the Maxi Trial.
no place on the mapWikipedia: Antonino Scopelliti - 1993
The Liberal Democratic Party of Japan loses a 38-year hold on national leadership.
no place on the mapWikipedia: Liberal Democratic Party - 1995
Aviateca Flight 901 crashes into the San Vicente volcano in El Salvador, killing all 65 people on board.
Latin America · Aviateca Flight 901Wikipedia: Aviateca Flight 901 - 1999
Russian president Boris Yeltsin fires his prime minister, Sergei Stepashin, and for the fourth time fires his entire cabinet.
no place on the mapWikipedia: Boris Yeltsin - 2001
Second Intifada: A suicide bomber attacked a pizza restaurant in Jerusalem, killing 15 people and wounding 130 others.
Asia · Sbarro restaurant suicide bombingWikipedia: Sbarro restaurant suicide bombing - 2006
At least 21 suspected terrorists are arrested in the 2006 transatlantic aircraft plot that happened in the United Kingdom. The arrests are made in London, Birmingham, and High Wycombe in an overnight operation.
Britain & Ireland · BirminghamWikipedia: 2006 transatlantic aircraft plot - 2007
Air Moorea Flight 1121 crashes after takeoff from Moorea Airport in French Polynesia, killing all 20 people on board.
Oceania · Air Moorea Flight 1121Wikipedia: Air Moorea Flight 1121 - 2012
Shannon Eastin becomes the first woman to officiate an NFL game.
no place on the mapWikipedia: Shannon Eastin - 2013
Gunmen open fire at a Sunni mosque in the city of Quetta killing at least ten people and injuring 30.
Asia · QuettaWikipedia: Terrorist incidents in Pakistan in 2013 - 2014
Michael Brown, an 18-year-old African American male in Ferguson, Missouri, is shot and killed by a Ferguson police officer after reportedly assaulting the officer and attempting to steal his weapon, sparking protests and unrest in the city.
North America · Killing of Michael BrownWikipedia: Killing of Michael Brown - 2018
A civilian school bus in Dahyan, Yemen, was bombed by Saudi Arabia killing at least 40 children under 15.
Asia · Dahyan airstrikeWikipedia: Dahyan airstrike - 2021
The Tampere light rail officially starts operating.
no place on the mapWikipedia: Tampere light rail - 2023
Ecuadorian presidential candidate Fernando Villavicencio was assassinated in Quito, eleven days before the general election.
Latin America · Assassination of Fernando VillavicencioWikipedia: Assassination of Fernando Villavicencio - 2024
Voepass Linhas Aéreas Flight 2283 crashes near Vinhedo, São Paulo, killing all 62 people on board.
Latin America · Voepass Flight 2283Wikipedia: Voepass Flight 2283
What the other Wikipedias remember
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Romanian and Spanish and were translated for this page.
- 1483
The Sistine Chapel in Rome is opened, with the celebration of a Mass.
- 1992
The closing ceremony of the Barcelona 1992 Olympic Games takes place.
Europe · 1992 Summer OlympicsTranslated from the list on Wikipedia in SpanishWikipedia: Juegos Olímpicos de Barcelona 1992
Who was born on 9 August
In order of how many Wikipedia editions have an article about each. The first 60 of 233 are shown.
- 1963
Whitney Houston, American singer-songwriter, producer, and actress (died 2012)
- 1896
Jean Piaget, Swiss psychologist and philosopher (died 1980)
NeuchâtelWikipedia: Jean Piaget - 1968
Gillian Anderson, American-British actress, activist and writer
ChicagoWikipedia: Gillian Anderson - 1939
Romano Prodi, Italian academic and politician, 52nd Prime Minister of Italy
ScandianoWikipedia: Romano Prodi - 1776
Amedeo Avogadro, Italian physicist and chemist (died 1856)
- 1938
Leonid Kuchma, Ukrainian engineer and politician, 2nd President of Ukraine
ChaikyneWikipedia: Leonid Kuchma - 1914
Tove Jansson, Finnish author and illustrator (died 2001)
HelsinkiWikipedia: Tove Jansson - 1972
Juanes, Colombian singer and songwriter
MedellínWikipedia: Juanes - 1985
Anna Kendrick, American actress and singer
PortlandWikipedia: Anna Kendrick - 1911
William Alfred Fowler, American astronomer and astrophysicist, Nobel Laureate (died 1996)
PittsburghWikipedia: William Alfred Fowler - 1961
John Key, New Zealand businessman and politician, 38th Prime Minister of New Zealand
AucklandWikipedia: John Key - 1957
Melanie Griffith, American actress and producer
ManhattanWikipedia: Melanie Griffith - 1976
Audrey Tautou, French model and actress
BeaumontWikipedia: Audrey Tautou - 1973
Filippo Inzaghi, Italian footballer and manager
PiacenzaWikipedia: Filippo Inzaghi - 1927
Marvin Minsky, American cognitive scientist, computer scientist, and pioneer in the field of artificial intelligence (died 2016)
New York CityWikipedia: Marvin Minsky - 1953
Jean Tirole, French economist and academic, Nobel Prize laureate
TroyesWikipedia: Jean Tirole - 1931
Mário Zagallo, Brazilian footballer and coach (died 2024)
AtalaiaWikipedia: Mário Zagallo - 1968
Eric Bana, Australian actor, comedian, producer, and screenwriter
MelbourneWikipedia: Eric Bana - 1988
Willian, Brazilian footballer
Ribeirão PiresWikipedia: Willian - 1938
Rod Laver, Australian tennis player and coach
RockhamptonWikipedia: Rod Laver - 1985
Filipe Luís, Brazilian footballer
Jaraguá do SulWikipedia: Filipe Luís - 1899
P. L. Travers, Australian-English author and actress (died 1996)
MaryboroughWikipedia: P. L. Travers - 1947
Roy Hodgson, English footballer and manager
CroydonWikipedia: Roy Hodgson - 1982
Tyson Gay, American sprinter
LexingtonWikipedia: Tyson Gay - 1928
Bob Cousy, American basketball player and coach
ManhattanWikipedia: Bob Cousy - 1944
Sam Elliott, American actor and producer
SacramentoWikipedia: Sam Elliott - 1990
Bill Skarsgård, Swedish actor
Maria Magdalena parishWikipedia: Bill Skarsgård - 1922
Philip Larkin, English poet and novelist (died 1985)
CoventryWikipedia: Philip Larkin - 1927
Robert Shaw, English actor and screenwriter (died 1978)
WesthoughtonWikipedia: Robert Shaw - 1977
Mikaël Silvestre, French footballer
Chambray-lès-ToursWikipedia: Mikaël Silvestre - 1927
Daniel Keyes, American short story writer and novelist (died 2014)
BrooklynWikipedia: Daniel Keyes - 1938
Otto Rehhagel, German footballer, coach, and manager
- 1985
Vivek Ramaswamy, American entrepreneur and politician
CincinnatiWikipedia: Vivek Ramaswamy - 1757
Thomas Telford, Scottish architect and engineer, designed the Menai Suspension Bridge (died 1834)
GlendinningWikipedia: Thomas Telford - 1819
William T. G. Morton, American dentist who first used ether as a surgical anaesthetic (died 1868)
CharltonWikipedia: William T. G. Morton - 1975
Mahesh Babu, Indian actor and producer
ChennaiWikipedia: Mahesh Babu - 1977
Ravshan Irmatov, Uzbek football referee
TashkentWikipedia: Ravshan Irmatov - 1919
Joop den Uyl, Dutch journalist, economist, and politician, Prime Minister of the Netherlands (died 1987)
HilversumWikipedia: Joop den Uyl - 1976
Rhona Mitra, English actress and singer
PaddingtonWikipedia: Rhona Mitra - 1976
Jessica Capshaw, American actress
ColumbiaWikipedia: Jessica Capshaw - 1991
Hansika Motwani, Indian actress
- 1991
Alexa Bliss, American bodybuilder and wrestler
ColumbusWikipedia: Alexa Bliss - 1847
Maria Vittoria dal Pozzo, Queen Consort of King Amadeo I of Spain (died 1876)
- 1994
King Von, American rapper (died 2020)
ChicagoWikipedia: King Von - 1783
Grand Duchess Alexandra Pavlovna of Russia (died 1801)
- 1939
Hércules Brito Ruas, Brazilian footballer (died 2026)
Rio de JaneiroWikipedia: Brito - 1943
Ken Norton, American boxer and actor (died 2013)
JacksonvilleWikipedia: Ken Norton - 1958
Amanda Bearse, American actress, comedian and director
Winter ParkWikipedia: Amanda Bearse - 1959
Michael Kors, American fashion designer
Long IslandWikipedia: Michael Kors - 1973
Kevin McKidd, Scottish actor and director
- 1978
Wesley Sonck, Belgian footballer
NinoveWikipedia: Wesley Sonck - 1878
Eileen Gray, Irish architect and furniture designer (died 1976)
EnniscorthyWikipedia: Eileen Gray - 1983
Virginia Giuffre, American sex trafficking activist and founder of Speak Out, accused Prince Andrew of sexual assault (died 2025)
SacramentoWikipedia: Virginia Giuffre - 1966
Linn Ullmann, Norwegian journalist and author
- 1990
Sarah McBride, American LGBT activist and US Representative
WilmingtonWikipedia: Sarah McBride - 1593
Izaak Walton, English biographer and author (The Compleat Angler) (died 1683)
StaffordWikipedia: Izaak Walton - 1696
Joseph Wenzel I, Prince of Liechtenstein (died 1772)
- 1872
Archduke Joseph August of Austria (died 1962)
AlcsútdobozWikipedia: Archduke Joseph August of Austria - 1974
Raphaël Poirée, French biathlete
- 1995
Justice Smith, American actor
Los AngelesWikipedia: Justice Smith
What is celebrated on 9 August
- Battle of Gangut Day (Russia)
- Christian feast day: Candida Maria of Jesus
- Christian feast day: Edith Stein (St Teresa Benedicta of the Cross)
- Christian feast day: Firmus and Rusticus
- Christian feast day: Blessed Florentino Asensio Barroso
- Christian feast day: Herman of Alaska (Russian Orthodox Church and related congregations; Episcopal Church (USA))
- Christian feast day: Mary Sumner (Church of England)
- Christian feast day: Nath Í of Achonry
- Christian feast day: Romanus Ostiarius
- Christian feast day: Secundian, Marcellian and Verian
- Christian feast day: August 9 (Eastern Orthodox liturgics)
- International Day of the World's Indigenous Peoples (United Nations)
- Meyboom (Brussels and Leuven, Belgium)
- National Day, celebrates the independence of Singapore from Malaysia in 1965.
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.