A birthday on the globe
13 July on the globe: what happened in the world on this day, and who was born
For 13 July, the English Wikipedia lists 49 events and 200 births. 30 of the events stand at their places as rays of light; seven 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 13 July through the years
The Earth on 13 July
The picture on the globe was assembled by NASA from satellite photographs taken in July 2004: the snow, the ice and the green are those of the month.
On 13 July the Sun passes straight overhead at noon along the parallel of 21.8° north. In London, the day lasts about 16 hours 15 minutes.
Beyond 68° north the Sun no longer sets; beyond 68° 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 · Live Aid
1985
The Live Aid benefit concert takes place in London and Philadelphia, as well as other venues such as Moscow and Sydney.
On the map: the coordinates Wikidata gives for the article “Live Aid”.
Also on the day’s list of Wikipedia in Spanish and Chinese.
Europe · Berlin
1878
Treaty of Berlin: The European powers redraw the map of the Balkans. Serbia, Montenegro and Romania become completely independent of the Ottoman Empire.
On the map: Berlin.
Also on the day’s list of Wikipedia in Spanish and Romanian.
Europe · Vuoristorata
1951
Vuoristorata, one of the oldest still-operating wooden roller coasters in Europe, is opened at the Linnanmäki amusement park in Helsinki, Finland.
On the map: Vuoristorata.
Asia · Scottish Church College
1830
The General Assembly's Institution, now the Scottish Church College, one of the pioneering institutions that ushered the Bengali Renaissance, is founded by Alexander Duff and Raja Ram Mohan Roy, in Calcutta, India.
On the map: Scottish Church College.
Latin America · Estadio Centenario
1930
The inaugural FIFA World Cup begins in Uruguay.
On the map: Estadio Centenario.
Also on the day’s list of Wikipedia in Spanish and Chinese.
North America · Dartmouth workshop
1956
The Dartmouth workshop is the first conference on artificial intelligence.
On the map: the coordinates Wikidata gives for the article “Dartmouth workshop”.
13 July
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 Chinese and Spanish and were translated for this page.
From Wikipedia in Chinese · Plymouth
1772
The British Royal Navy explorer James Cook sets out from Plymouth with two ships to begin his second voyage of exploration.
On the map: Plymouth.
Translated from the list on Wikipedia in Chinese.
From Wikipedia in Chinese · St James's Palace
1837
After formally becoming British monarch, Queen Victoria moves the British royal household from St James's Palace to Buckingham Palace.
On the map: St James's Palace.
Translated from the list on Wikipedia in Chinese.
From Wikipedia in Chinese · London
1908
The 4th Olympic Games open in London, Britain.
On the map: London.
Translated from the list on Wikipedia in Chinese.
From Wikipedia in Spanish · Moscow
2001
The IOC, meeting in Moscow, chooses Beijing as host of the 2008 Olympic Games.
On the map: Moscow.
Translated from the list on Wikipedia in Spanish.
The article on Wikipedia in Spanish: Juegos Olímpicos de Pekín 2008
13 July
Born on 13 July#
The English Wikipedia lists 200 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 13 July
1942
Harrison Ford, American actor and producer
Place of birth: Chicago.
Born on 13 July
1934
Wole Soyinka, Nigerian author, poet, and playwright, Nobel Prize laureate
Place of birth: Abeokuta.
Born on 13 July
2007
Lamine Yamal, Spanish footballer
Place of birth: Esplugues de Llobregat.
Born on 13 July
1940
Patrick Stewart, English actor, director, and producer
Place of birth: Mirfield.
Born on 13 July
1894
Isaac Babel, Russian short story writer, journalist, and playwright (died 1940)
Place of birth: Odesa.
Born in Britain and Ireland
1527
John Dee, English-Welsh mathematician, astronomer, and astrologer (died 1609)
Place of birth: London.
Born in Britain and Ireland
1979
Craig Bellamy, Welsh footballer
Place of birth: Cardiff.
Born in Britain and Ireland
1971
MF Doom, English-American rapper (died 2020)
Place of birth: London.
13 July
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: 13 July 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 13 July
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 12 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.
- 1174
William I of Scotland, a key rebel in the Revolt of 1173–74, is captured at Alnwick by forces loyal to Henry II of England.
Britain & Ireland · AlnwickWikipedia: William the Lion - 1249
Coronation of Alexander III as King of Scots.
Britain & Ireland · Kingdom of ScotlandWikipedia: Coronation - 1260
The Livonian Order suffers its greatest defeat in the 13th century in the Battle of Durbe against the Grand Duchy of Lithuania.
Europe · Battle of DurbeWikipedia: Battle of Durbe - 1402
Nanjing surrenders to Zhu Di without a fight, ending the Jingnan campaign. The Jianwen Emperor disappears and his family is incarcerated.
Asia · NanjingWikipedia: Jingnan campaign - 1558
Battle of Gravelines: In France, Spanish forces led by Count Lamoral of Egmont defeat the French forces of Marshal Paul de Thermes at Gravelines.
Europe · Battle of GravelinesWikipedia: Battle of Gravelines - 1573
Eighty Years' War: The Siege of Haarlem ends after seven months.
Europe · Siege of HaarlemWikipedia: Eighty Years' War - 1586
Anglo–Spanish War: A convoy of English ships from the Levant Company manage to repel a fleet of eleven Spanish and Maltese galleys off the Mediterranean island of Pantelleria.
Europe · PantelleriaWikipedia: Battle of Pantelleria - 1643
English Civil War: Battle of Roundway Down: In England, Henry Wilmot, 1st Earl of Rochester, commanding the Royalist forces, heavily defeats the Parliamentarian forces led by Sir William Waller.
Britain & Ireland · Battle of Roundway DownWikipedia: Battle of Roundway Down - 1690
Nine Years' War: French naval forces led by Anne Hilarion de Tourville, fresh from their victory at Beachy Head, sail West and launch a raid on the small English town of Teignmouth, leaving it devastated.
Britain & Ireland · Battle of Beachy HeadWikipedia: Nine Years' War - 1787
The Congress of the Confederation enacts the Northwest Ordinance establishing governing rules for the Northwest Territory. It also establishes procedures for the admission of new states and limits the expansion of slavery.
North America · Northwest TerritoryWikipedia: Congress of the Confederation - 1794
The Battle of Trippstadt between French forces and those of Prussia and Austria begins.
Europe · Battle of TrippstadtWikipedia: Battle of Trippstadt - 1798
The French Armée d'Orient under Napoleon Bonaparte defeats a Mamluk army under Murad Bey in battle of Shubra Khit.
Africa · Battle of Shubra KhitWikipedia: Battle of Shubra Khit - 1814
The Carabinieri, the national gendarmerie of Italy, is established.
no place on the mapWikipedia: Carabinieri - 1830
The General Assembly's Institution, now the Scottish Church College, one of the pioneering institutions that ushered the Bengali Renaissance, is founded by Alexander Duff and Raja Ram Mohan Roy, in Calcutta, India.
Asia · Scottish Church CollegeWikipedia: Scottish Church College - 1831
Regulamentul Organic, a quasi-constitutional organic law, is adopted in Wallachia, one of the two Danubian Principalities that were to become the basis of Romania.
Europe · RomaniaWikipedia: Regulamentul Organic - 1841
Austria, Britain, France, Prussia and Russia conclude the London Straits Convention, which forbids warships to cross the Bosporus and Dardanelles in times of war.
no place on the mapWikipedia: London Straits Convention - 1849
The Charleston Workhouse Slave Rebellion begins in Charleston, South Carolina, United States.
North America · Charleston Workhouse Slave RebellionWikipedia: Charleston Workhouse Slave Rebellion - 1854
In the Battle of Guaymas, Mexico, General José María Yáñez stops the French invasion led by Count Gaston de Raousset-Boulbon.
no place on the mapWikipedia: José María Yáñez - 1855
Firefighters in Toronto, Canada, destroyed the infrastructure of a visiting circus; police refusal to identify rioters caused widespread protest and a complete redesign of the city's police service.
North America · Toronto circus riotWikipedia: Toronto circus riot - 1863
American Civil War: The New York City draft riots begin three days of rioting which will later be regarded as the worst in United States history.
North America · New York City draft riotsWikipedia: American Civil War - 1878
Treaty of Berlin: The European powers redraw the map of the Balkans. Serbia, Montenegro and Romania become completely independent of the Ottoman Empire.
Europe · BerlinWikipedia: Treaty of Berlin - 1913
The 1913 Romanian Army cholera outbreak during the Second Balkan War starts.
no place on the mapWikipedia: Second Balkan War - 1914
Felix Ysagun Manalo registers the Iglesia ni Cristo (Church of Christ) as Iglesia ni Kristo with the government of the Philippines.
Asia · PhilippinesWikipedia: Felix Manalo - 1919
The British airship R34 lands in Norfolk, England, completing the first airship return journey across the Atlantic in 182 hours of flight.
no place on the mapWikipedia: Airship - 1930
The inaugural FIFA World Cup begins in Uruguay.
Latin America · Estadio CentenarioWikipedia: 1930 FIFA World Cup - 1941
World War II: Montenegrins begin the Trinaestojulski ustanak (Thirteenth of July Uprising), a popular revolt against the Axis powers.
Europe · Governorate of MontenegroWikipedia: Uprising in Montenegro - 1942
World War II: The 1st Filipino Infantry Regiment was converted from a battalion to accommodate a larger number of volunteers spurred on by the Japanese invasion of the Philippines.
no place on the mapWikipedia: World War II - 1943
World War II: Operation Fustian, an Allied operation to capture the Primosole Bridge in Sicily, was launched.
Europe · Operation FustianWikipedia: World War II - 1951
Vuoristorata, one of the oldest still-operating wooden roller coasters in Europe, is opened at the Linnanmäki amusement park in Helsinki, Finland.
Europe · VuoristorataWikipedia: Vuoristorata - 1956
The Dartmouth workshop is the first conference on artificial intelligence.
North America · Dartmouth workshopWikipedia: Dartmouth workshop - 1962
In an unprecedented action, British Prime Minister Harold Macmillan dismisses seven members of his Cabinet, marking the effective end of the National Liberals as a distinct force within British politics.
no place on the mapWikipedia: Night of the Long Knives - 1973
Watergate scandal: Alexander Butterfield reveals the existence of a secret Oval Office taping system to investigators for the Senate Watergate Committee.
no place on the mapWikipedia: Watergate scandal - 1977
Amidst a period of financial and social turmoil, New York City experiences an electrical blackout lasting nearly 24 hours that leads to widespread fires and looting.
North America · New York City blackout of 1977Wikipedia: New York City blackout of 1977 - 1977
Somalia declares war on Ethiopia, starting the Ogaden War.
no place on the mapWikipedia: Ogaden War - 1985
The Live Aid benefit concert takes place in London and Philadelphia, as well as other venues such as Moscow and Sydney.
Britain & Ireland · Live AidWikipedia: Live Aid - 1985
Vice President George H. W. Bush becomes the Acting President for the day when President Ronald Reagan undergoes surgery to remove polyps from his colon.
no place on the mapWikipedia: Vice President of the United States - 1990
Lenin Peak disaster: a 6.4-magnitude earthquake in Afghanistan triggers an avalanche on Lenin Peak, killing 43 climbers in the deadliest mountaineering disaster in history.
Asia · Lenin Peak disasterWikipedia: Lenin Peak disaster - 1992
Croatian War of Independence: The Croatian Army concluded Operation Tiger, advancing 17 kilometres (11 miles) into the Dubrovnik hinterland.
Europe · Operation TigerWikipedia: Croatian War of Independence - 1995
Space Shuttle Discovery is launched on STS-70 to deploy the TDRS-7 satellite.
no place on the mapWikipedia: Space Shuttle Discovery - 2003
French DGSE personnel abort an operation to rescue Íngrid Betancourt from FARC rebels in Colombia, causing a political scandal when details are leaked to the press.
Latin America · ColombiaWikipedia: Operation 14 July - 2008
Battle of Wanat begins when Taliban and al-Qaeda guerrillas attack US Army and Afghan National Army troops in Afghanistan. The U.S. deaths were, at that time, the most in a single battle since the beginning of operations in 2001.
Asia · Battle of WanatWikipedia: Battle of Wanat - 2011
Mumbai is rocked by three bomb blasts during the evening rush hour, killing 26 and injuring 130.
Asia · 2011 Mumbai bombingsWikipedia: 2011 Mumbai bombings - 2011
Noar Linhas Aéreas Flight 4896 crashes in Boa Viagem, Recife, killing all 16 people on board.
Latin America · Noar Linhas Aéreas Flight 4896Wikipedia: Noar Linhas Aéreas Flight 4896 - 2011
United Nations Security Council Resolution 1999 is adopted, which admits South Sudan to member status of United Nations.
Africa · South SudanWikipedia: United Nations Security Council Resolution 1999 - 2013
Typhoon Soulik kills at least nine people and affects more than 160 million in East China and Taiwan.
Asia · TaiwanWikipedia: Typhoon Soulik - 2014
Germany wins the FIFA World Cup, defeating Argentina in the final 1–0 after extra time.
Latin America · Arena Cidade da CopaWikipedia: 2014 FIFA World Cup - 2016
Prime Minister of the United Kingdom David Cameron resigns, and is succeeded by Theresa May.
no place on the mapWikipedia: Prime Minister of the United Kingdom - 2020
After a five-day search, the body of American actress and singer Naya Rivera is recovered from Lake Piru in California, where she had drowned.
North America · Death of Naya RiveraWikipedia: Death of Naya Rivera - 2024
Former president of the United States Donald Trump is injured in an assassination attempt while speaking at an election campaign rally near Butler, Pennsylvania.
North America · Attempted assassination of Donald Trump in PennsylvaniaWikipedia: Attempted assassination of Donald Trump in Pennsylvania
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 Chinese and Spanish and were translated for this page.
- 1772
The British Royal Navy explorer James Cook sets out from Plymouth with two ships to begin his second voyage of exploration.
- 1837
After formally becoming British monarch, Queen Victoria moves the British royal household from St James's Palace to Buckingham Palace.
Britain & Ireland · St James's PalaceTranslated from the list on Wikipedia in ChineseWikipedia: 圣詹姆士宫 - 1908
The 4th Olympic Games open in London, Britain.
- 2001
The IOC, meeting in Moscow, chooses Beijing as host of the 2008 Olympic Games.
Europe · MoscowTranslated from the list on Wikipedia in SpanishWikipedia: Juegos Olímpicos de Pekín 2008
Who was born on 13 July
In order of how many Wikipedia editions have an article about each. The first 60 of 200 are shown.
- 1942
Harrison Ford, American actor and producer
ChicagoWikipedia: Harrison Ford - 1934
Wole Soyinka, Nigerian author, poet, and playwright, Nobel Prize laureate
AbeokutaWikipedia: Wole Soyinka - 2007
Lamine Yamal, Spanish footballer
Esplugues de LlobregatWikipedia: Lamine Yamal - 1590
Pope Clement X (died 1676)
- 1940
Patrick Stewart, English actor, director, and producer
MirfieldWikipedia: Patrick Stewart - 1894
Isaac Babel, Russian short story writer, journalist, and playwright (died 1940)
- 1927
Simone Veil, French lawyer and politician, President of the European Parliament (died 2017)
- 1950
Ma Ying-jeou, Hong Kong-Taiwanese commander and politician, 12th President of the Republic of China
Kwong Wah HospitalWikipedia: Ma Ying-jeou - 1608
Ferdinand III, Holy Roman Emperor (died 1657)
- 1985
Guillermo Ochoa, Mexican footballer
GuadalajaraWikipedia: Guillermo Ochoa - 1527
John Dee, English-Welsh mathematician, astronomer, and astrologer (died 1609)
LondonWikipedia: John Dee - 1918
Alberto Ascari, Italian racing driver (died 1955)
- 1944
Ernő Rubik, Hungarian game designer, architect, and educator, invented the Rubik's Cube
BudapestWikipedia: Ernő Rubik - 1974
Jarno Trulli, Italian racing driver
PescaraWikipedia: Jarno Trulli - 1841
Otto Wagner, Austrian architect, designed the Austrian Postal Savings Bank and Karlsplatz Stadtbahn Station (died 1918)
PenzingWikipedia: Otto Wagner - 1979
Craig Bellamy, Welsh footballer
CardiffWikipedia: Craig Bellamy - 1983
Liu Xiang, Chinese hurdler
Putuo DistrictWikipedia: Liu Xiang - 1962
Tom Kenny, American voice actor and screenwriter
East SyracuseWikipedia: Tom Kenny - 1941
Robert Forster, American actor and producer (died 2019)
RochesterWikipedia: Robert Forster - 1988
Colton Haynes, American actor, model and singer
AndaleWikipedia: Colton Haynes - 1946
Cheech Marin, American actor and comedian
Los AngelesWikipedia: Cheech Marin - 1969
Ken Jeong, American actor, comedian, and physician
DetroitWikipedia: Ken Jeong - 1864
John Jacob Astor IV, American colonel and businessman (died 1912)
RhinebeckWikipedia: John Jacob Astor IV - 1909
Souphanouvong, 1st President of Laos (died 1995)
Luang PrabangWikipedia: Souphanouvong - 1971
MF Doom, English-American rapper (died 2020)
LondonWikipedia: MF Doom - 1990
Eduardo Salvio, Argentinian footballer
AvellanedaWikipedia: Eduardo Salvio - 1922
Anker Jørgensen, Danish trade union leader and politician, 16th Prime Minister of Denmark (died 2016)
CopenhagenWikipedia: Anker Jørgensen - 1941
Jacques Perrin, French actor, director, and producer (died 2022)
14th arrondissement of ParisWikipedia: Jacques Perrin - 1863
Margaret Murray, British archaeologist, anthropologist, historian, and folklorist (died 1963)
KolkataWikipedia: Margaret Murray - 1903
Kenneth Clark, English historian and author (died 1983)
LondonWikipedia: Kenneth Clark - 1821
Nathan Bedford Forrest, American general and first Grand Wizard of the Ku Klux Klan (died 1877)
Chapel HillWikipedia: Nathan Bedford Forrest - 1935
Kurt Westergaard, Danish cartoonist (died 2021)
DøstrupWikipedia: Kurt Westergaard - 1948
Catherine Breillat, French director and screenwriter
BressuireWikipedia: Catherine Breillat - 1957
Cameron Crowe, American director, producer, and screenwriter
Palm SpringsWikipedia: Cameron Crowe - 1756
Thomas Rowlandson, English artist and caricaturist (died 1827)
Old JewryWikipedia: Thomas Rowlandson - 1793
John Clare, English poet and author (died 1864)
Clare CottageWikipedia: John Clare - 1932
Hubert Reeves, Canadian-French astrophysicist and author (died 2023)
MontrealWikipedia: Hubert Reeves - 1607
Wenceslaus Hollar, Czech-English painter and illustrator (died 1677)
New TownWikipedia: Wenceslaus Hollar - 1859
Sidney Webb, 1st Baron Passfield, English economist and politician, Secretary of State for the Colonies (died 1947)
- 1957
Thierry Boutsen, Belgian racing driver and businessman
Brussels metropolitan areaWikipedia: Thierry Boutsen - 1933
David Storey, English author, playwright, and screenwriter (died 2017)
WakefieldWikipedia: David Storey - 1997
Leo Howard, American actor and martial artist
Newport BeachWikipedia: Leo Howard - 1934
Aleksei Yeliseyev, Russian engineer and astronaut
ZhizdraWikipedia: Aleksei Yeliseyev - 1995
Dante Exum, Australian basketball player
MelbourneWikipedia: Danté Exum - 1898
Julius Schreck, German commander (died 1936)
- 1933
Piero Manzoni, Italian artist (died 1963)
SoncinoWikipedia: Piero Manzoni - 1936
Albert Ayler, American saxophonist and composer (died 1970)
ClevelandWikipedia: Albert Ayler - 1979
Daniel Díaz, Argentinian footballer
San Fernando del Valle de CatamarcaWikipedia: Cata Díaz - 1985
Charlotte Dujardin, English equestrian
London Borough of EnfieldWikipedia: Charlotte Dujardin - 1935
Jack Kemp, American football player and politician, 9th United States Secretary of Housing and Urban Development (died 2009)
Los AngelesWikipedia: Jack Kemp - 1953
Gil Birmingham, American actor
San AntonioWikipedia: Gil Birmingham - 1985
Abdallah El Said, Egyptian footballer
IsmailiaWikipedia: Abdallah El Said - 1988
Tulisa, English singer-songwriter and actress
LondonWikipedia: Tulisa - 1930
Naomi Shemer, Israeli singer-songwriter (died 2004)
Kvutzat KinneretWikipedia: Naomi Shemer - 1932
Per Nørgård, Danish composer and music theorist (died 2025)
GentofteWikipedia: Per Nørgård - 1942
Roger McGuinn, American singer-songwriter and guitarist
ChicagoWikipedia: Roger McGuinn - 1908
Dorothy Round, English tennis player (died 1982)
DudleyWikipedia: Dorothy Round - 1928
Sven Davidson, Swedish-American tennis player (died 2008)
- 1961
Anders Jarryd, Swedish tennis player
LidköpingWikipedia: Anders Järryd - 1915
Kaoru Ishikawa, Japanese author and educator (died 1989)
What is celebrated on 13 July
- Christian feast day: Abd-al-Masih
- Christian feast day: Abel of Tacla Haimonot (Coptic Church)
- Christian feast day: Clelia Barbieri
- Christian feast day: Conrad Weiser (Episcopal Church (USA))
- Christian feast day: Eugenius of Carthage
- Christian feast day: Henry II, Holy Roman Emperor
- Christian feast day: Jacobus de Voragine
- Christian feast day: Blessed Mariano de Jesús Euse Hoyos
- Christian feast day: Mildrith of Thanet
- Christian feast day: Our Lady Mystical Rose
- Christian feast day: Silas (Catholic Church)
- Christian feast day: Teresa of Los Andes
- Christian feast day: July 13 (Eastern Orthodox liturgics)
- Statehood Day (Montenegro)
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.