A birthday on the globe
29 March on the globe: what happened in the world on this day, and who was born
For 29 March, the English Wikipedia lists 58 events and 190 births. 28 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 29 March through the years
The Earth on 29 March
The picture on the globe was assembled by NASA from satellite photographs taken in March 2004: the snow, the ice and the green are those of the month.
On 29 March the Sun passes straight overhead at noon along the parallel of 3.6° north. In London, the day lasts about 12 hours 45 minutes.
Beyond 86° north the Sun no longer sets; beyond 86° 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 · Royal Albert Hall
1871
Royal Albert Hall is opened by Queen Victoria.
On the map: Royal Albert Hall.
Also on the day’s list of Wikipedia in Spanish and Chinese.
Asia · Taipei 101
2004
The Council on Tall Buildings and Urban Habitat certifies Taipei 101 as the world's tallest building, based on the building having been topped out on 1 July 2003, even though the building was not completed until 31 December 2004.
On the map: Taipei 101.
Latin America · Salvador, Bahia
1549
The city of Salvador, Bahia, the first capital of Brazil, is founded.
On the map: Salvador, Bahia.
Also on the day’s list of Wikipedia in Spanish and Romanian.
North America · Broadway theatre
1951
The King and I, a musical about Mongkut of Siam by Rodgers and Hammerstein, premiered on Broadway.
On the map: Broadway theatre.
North America · Washington, D.C.
1961
The Twenty-third Amendment to the United States Constitution is ratified, allowing residents of Washington, D.C., to vote in presidential elections.
On the map: Washington, D.C..
Also on the day’s list of Wikipedia in Spanish.
Wikipedia: Twenty-third Amendment to the United States Constitution
North America · Indianapolis
1984
The Baltimore Colts load their possessions onto fifteen Mayflower moving trucks in the early morning hours and transfer their operations to Indianapolis.
On the map: Indianapolis.
29 March
What the other Wikipedias remember#
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Spanish and were translated for this page.
From Wikipedia in Spanish · Miami
1998
In Miami (United States), the Chilean tennis player Marcelo Ríos becomes the first South American to be No. 1 in the ATP Rankings, by beating Andre Agassi in the final of the Miami Masters.
On the map: Miami.
Translated from the list on Wikipedia in Spanish.
29 March
Born on 29 March#
The English Wikipedia lists 190 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 March
1943
Vangelis, Greek keyboard player and songwriter (died 2022)
Place of birth: Agria.
Born on 29 March
1895
Ernst Jünger, German philosopher and author (died 1998)
Place of birth: Heidelberg.
Born on 29 March
1968
Lucy Lawless, New Zealand actress
Place of birth: Mount Albert.
Born on 29 March
1960
Jo Nesbø, Norwegian writer, musician and football player
Place of birth: Oslo.
Born in Britain and Ireland
1943
Eric Idle, English actor, comedian, musician and writer
Place of birth: South Shields.
Born in Britain and Ireland
1955
Brendan Gleeson, Irish actor
Place of birth: Dublin.
Born in Britain and Ireland
1927
John Vane, English pharmacologist and academic, Nobel Prize laureate (died 2004)
Place of birth: Wythall.
29 March
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 March 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 March
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 23 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.
- 845
Viking expansion: Viking raiders, possibly led by the legendary Ragnar Lodbrok, plundered and occupied Paris, holding the city for a large ransom.
Europe · Siege of ParisWikipedia: Siege of Paris - 1139
Pope Innocent II issues the bull Omne datum optimum in which he endorses the Knights Templar and approves the Templar Rule.
no place on the mapWikipedia: Knights Templar - 1430
The Ottoman Empire under Murad II captures Thessalonica from the Republic of Venice.
Europe · Siege of ThessalonicaWikipedia: Siege of Thessalonica - 1461
Battle of Towton: Edward of York defeats Queen Margaret to become King Edward IV of England, bringing a temporary stop to the Wars of the Roses.
Britain & Ireland · Battle of TowtonWikipedia: Battle of Towton - 1549
The city of Salvador, Bahia, the first capital of Brazil, is founded.
Latin America · Salvador, BahiaWikipedia: Salvador, Bahia - 1632
Treaty of Saint-Germain is signed returning Quebec to French control after the English had seized it in 1629.
North America · QuebecWikipedia: Treaty of Saint-Germain-en-Laye - 1792
King Gustav III of Sweden dies after being shot in the back at a midnight masquerade ball at Stockholm's Royal Opera 13 days earlier.
Europe · StockholmWikipedia: Royal Swedish Opera - 1800
William Matthews was ordained as the first Catholic priest born in British America.
no place on the mapWikipedia: William Matthews - 1806
Construction is authorized of the Great National Pike, better known as the Cumberland Road, becoming the first United States federal highway.
no place on the mapWikipedia: National Road - 1807
German astronomer Heinrich Wilhelm Matthias Olbers discovered Vesta, the brightest asteroid and second-most massive body in the asteroid belt.
no place on the mapWikipedia: Heinrich Wilhelm Matthias Olbers - 1809
At the Diet of Porvoo, Finland's four Estates pledge allegiance to Alexander I of Russia, commencing the secession of the Grand Duchy of Finland from Sweden.
Europe · Diet of PorvooWikipedia: Diet of Porvoo - 1809
King Gustav IV Adolf of Sweden abdicates after a coup d'état.
no place on the mapWikipedia: Gustav IV Adolf - 1823
Joaquín de Oreamuno led a coup d'état that overthrew Rafael Francisco Osejo, attempting to restore allegiance to the Mexican Empire.
no place on the mapWikipedia: Central America under Mexican rule - 1831
Authorities held an inquest at New Town, Tasmania, into the deaths of a woman and two children who were fatally poisoned after eating smooth toadfish.
Oceania · New Town, TasmaniaWikipedia: New Town, Tasmania - 1847
Mexican–American War: United States forces led by General Winfield Scott take Veracruz after a siege.
Latin America · Siege of VeracruzWikipedia: Mexican–American War - 1849
The United Kingdom annexes the Punjab.
Britain & Ireland · United Kingdom of Great Britain and IrelandWikipedia: United Kingdom of Great Britain and Ireland - 1857
Sepoy Mangal Pandey of the 34th Regiment, Bengal Native Infantry mutinies against the East India Company's rule in India and inspires the protracted Indian Rebellion of 1857, also known as the Sepoy Mutiny.
no place on the mapWikipedia: Indian Rebellion of 1857 - 1865
American Civil War: The Appomattox campaign opened with the Battle of Lewis's Farm, in which the Confederate Army of Northern Virginia was forced into a series of retreats that would culminate in their surrender.
North America · Battle of Lewis's FarmWikipedia: American Civil War - 1867
Queen Victoria gives Royal Assent to the British North America Act which establishes Canada on July 1.
no place on the mapWikipedia: Queen Victoria - 1871
Royal Albert Hall is opened by Queen Victoria.
Britain & Ireland · Royal Albert HallWikipedia: Royal Albert Hall - 1879
Anglo-Zulu War: Battle of Kambula: British forces defeat 20,000 Zulus.
Africa · Battle of KambulaWikipedia: Battle of Kambula - 1882
The Knights of Columbus is established.
no place on the mapWikipedia: Knights of Columbus - 1927
Sunbeam 1000hp breaks the land speed record at Daytona Beach, Florida.
no place on the mapWikipedia: Sunbeam 1000 hp - 1936
The 1936 German parliamentary election and referendum seeks approval for the recent remilitarization of the Rhineland.
no place on the mapWikipedia: 1936 German parliamentary election and referendum - 1941
The North American Regional Broadcasting Agreement goes into effect at 03:00 local time.
no place on the mapWikipedia: North American Regional Broadcasting Agreement - 1941
World War II: British Royal Navy and Royal Australian Navy forces defeat those of the Italian Regia Marina off the Peloponnesian coast of Greece in the Battle of Cape Matapan.
Europe · Battle of Cape MatapanWikipedia: World War II - 1942
The Bombing of Lübeck in World War II is the first major success for the RAF Bomber Command against Germany and a German city.
Europe · Sankt LorenzWikipedia: Bombing of Lübeck in World War II - 1947
The Malagasy Uprising against French colonial rule begins in Madagascar.
no place on the mapWikipedia: Malagasy Uprising - 1951
Hypnosis murders in Copenhagen.
Europe · Copenhagen hypnosis murdersWikipedia: Copenhagen hypnosis murders - 1951
Julius and Ethel Rosenberg are convicted of conspiracy to commit espionage.
no place on the mapWikipedia: Julius and Ethel Rosenberg - 1951
The King and I, a musical about Mongkut of Siam by Rodgers and Hammerstein, premiered on Broadway.
North America · Broadway theatreWikipedia: The King and I - 1957
The New York, Ontario and Western Railway makes its final run, the first major U.S. railroad to be abandoned in its entirety.
no place on the mapWikipedia: New York, Ontario and Western Railway - 1961
The Twenty-third Amendment to the United States Constitution is ratified, allowing residents of Washington, D.C., to vote in presidential elections.
North America · Washington, D.C.Wikipedia: Twenty-third Amendment to the United States Constitution - 1962
Arturo Frondizi, the president of Argentina, is overthrown in a military coup by Argentina's armed forces, ending an 11+1⁄2 day constitutional crisis.
Latin America · ArgentinaWikipedia: Arturo Frondizi - 1968
The funeral of Yuri Gagarin, the first man in space, begins in Moscow, with thousands of people in attendance.
Europe · MoscowWikipedia: Funeral of Yuri Gagarin and Vladimir Seryogin - 1971
My Lai massacre: Lieutenant William Calley is convicted of premeditated murder and sentenced to life in prison.
Asia · My Lai massacreWikipedia: My Lai massacre - 1973
Operation Barrel Roll, a covert American bombing campaign in Laos to stop communist infiltration of South Vietnam, ends.
no place on the mapWikipedia: Operation Barrel Roll - 1973
Vietnam War: The last United States combat soldiers leave South Vietnam.
Asia · South VietnamWikipedia: Vietnam War - 1974
NASA's Mariner 10 becomes the first space probe to fly by Mercury.
no place on the mapWikipedia: NASA - 1974
The Terracotta Army is discovered in Shaanxi province, China.
Asia · ShaanxiWikipedia: Terracotta Army - 1975
Jeff Beck released Blow by Blow, his most successful album in the U.S., reaching the top five and selling over one million copies.
no place on the mapWikipedia: Jeff Beck - 1979
Quebecair Flight 255 crashes after takeoff from Québec City Jean Lesage International Airport in Quebec City, killing 17.
North America · Quebecair Flight 255Wikipedia: Quebecair Flight 255 - 1981
Dick Beardsley and Inge Simonsen jointly won the Men's Elite Race and Joyce Smith won the Women's Elite Race in the inaugural London Marathon.
no place on the mapWikipedia: London Marathon - 1982
The Canada Act 1982 receives the Royal Assent from Queen Elizabeth II, setting the stage for the Queen of Canada to proclaim the Constitution Act, 1982.
no place on the mapWikipedia: Canada Act 1982 - 1984
The Baltimore Colts load their possessions onto fifteen Mayflower moving trucks in the early morning hours and transfer their operations to Indianapolis.
North America · IndianapolisWikipedia: Indianapolis Colts - 1990
The Czechoslovak parliament is unable to reach an agreement on what to call the country after the fall of Communism, sparking the so-called Hyphen War.
Europe · CzechoslovakiaWikipedia: Czechoslovakia - 1999
A magnitude 6.8 earthquake in India strikes the Chamoli district in Uttar Pradesh, killing 103.
Asia · 1999 Chamoli earthquakeWikipedia: 1999 Chamoli earthquake - 1999
The Dow Jones Industrial Average closes above the 10,000 mark (10,006.78) for the first time, during the height of the dot-com bubble.
no place on the mapWikipedia: Dot-com bubble - 2001
A Gulfstream III crashes on approach to Aspen/Pitkin County Airport in Aspen, Colorado. All 18 people on board are killed.
North America · 2001 Avjet Gulfstream III crashWikipedia: 2001 Avjet Gulfstream III crash - 2002
In reaction to the Passover massacre two days prior, Israel launches Operation Defensive Shield against Palestinian militants, its largest military operation in the West Bank since the 1967 Six-Day War.
Asia · Passover massacreWikipedia: Passover massacre - 2004
Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, and Slovenia join NATO as full members.
no place on the mapWikipedia: NATO - 2004
The Council on Tall Buildings and Urban Habitat certifies Taipei 101 as the world's tallest building, based on the building having been topped out on 1 July 2003, even though the building was not completed until 31 December 2004.
Asia · Taipei 101Wikipedia: Council on Vertical Urbanism - 2010
Two suicide bombers hit the Moscow Metro system at the peak of the morning rush hour, killing 40.
Europe · 2010 Moscow Metro bombingsWikipedia: 2010 Moscow Metro bombings - 2013
At least 36 people are killed when a 16-floor building collapses in the commercial capital Dar es Salaam, Tanzania.
Africa · 2013 Dar es Salaam building collapseWikipedia: 2013 Dar es Salaam building collapse - 2014
The first same-sex marriages in England and Wales are performed.
no place on the mapWikipedia: Same-sex marriage in the United Kingdom - 2015
Air Canada Flight 624 skids off the runway at Halifax Stanfield International Airport, after arriving from Toronto shortly past midnight. All 133 passengers and five crews on board survive, with 23 treated for minor injuries.
North America · Air Canada Flight 624Wikipedia: Air Canada Flight 624 - 2017
Prime Minister Theresa May invokes Article 50 of the Treaty on European Union, formally beginning the United Kingdom's withdrawal from the European Union.
Europe · European UnionWikipedia: United Kingdom invocation of Article 50 of the Treaty on European Union - 2021
The ship Ever Given is dislodged from the Suez Canal.
Africa · 2021 Suez Canal obstructionWikipedia: 2021 Suez Canal obstruction
What the other Wikipedias remember
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Spanish and were translated for this page.
- 1998
In Miami (United States), the Chilean tennis player Marcelo Ríos becomes the first South American to be No. 1 in the ATP Rankings, by beating Andre Agassi in the final of the Miami Masters.
Who was born on 29 March
In order of how many Wikipedia editions have an article about each. The first 60 of 190 are shown.
- 1790
John Tyler, American lawyer and politician, 10th President of the United States (died 1862)
Greenway PlantationWikipedia: John Tyler - 1943
John Major, English banker and politician, Prime Minister of the United Kingdom
LondonWikipedia: John Major - 1899
Lavrentiy Beria, Georgian-Russian general and politician (died 1953)
MerkheuliWikipedia: Lavrentiy Beria - 1991
N'Golo Kanté, French footballer
- 1943
Vangelis, Greek keyboard player and songwriter (died 2022)
AgriaWikipedia: Vangelis - 1895
Ernst Jünger, German philosopher and author (died 1998)
HeidelbergWikipedia: Ernst Jünger - 1968
Lucy Lawless, New Zealand actress
Mount AlbertWikipedia: Lucy Lawless - 1960
Jo Nesbø, Norwegian writer, musician and football player
- 1952
Bola Tinubu, Nigerian politician, President-elect of Nigeria
- 1957
Christopher Lambert, American-French actor
Great Neck PeninsulaWikipedia: Christopher Lambert - 1967
Michel Hazanavicius, French director, producer, and screenwriter
11th arrondissement of ParisWikipedia: Michel Hazanavicius - 1943
Eric Idle, English actor, comedian, musician and writer
South ShieldsWikipedia: Eric Idle - 1918
Sam Walton, American businessman, founded Walmart and Sam's Club (died 1992)
KingfisherWikipedia: Sam Walton - 1955
Brendan Gleeson, Irish actor
- 1929
Lennart Meri, Estonian director and politician, 2nd President of Estonia (died 2006)
TallinnWikipedia: Lennart Meri - 1976
Jennifer Capriati, American tennis player
New York CityWikipedia: Jennifer Capriati - 1799
Edward Smith-Stanley, 14th Earl of Derby, English politician, Prime Minister of the United Kingdom (died 1869)
- 1951
Roger Myerson, American economist and professor
- 1991
Irene, South Korean idol, actress and television host
DaeguWikipedia: Irene - 1874
Lou Henry Hoover, American philanthropist and geologist, 33rd First Lady of the United States (died 1944)
WaterlooWikipedia: Lou Henry Hoover - 1889
Warner Baxter, American actor (died 1951)
ColumbusWikipedia: Warner Baxter - 1826
Wilhelm Liebknecht, German journalist and politician (died 1900)
- 1927
John Vane, English pharmacologist and academic, Nobel Prize laureate (died 2004)
WythallWikipedia: John Vane - 1964
Elle Macpherson, Australian model and actress
KillaraWikipedia: Elle Macpherson - 1973
Marc Overmars, Dutch footballer and coach
- 1993
Thorgan Hazard, Belgian footballer
La LouvièreWikipedia: Thorgan Hazard - 1902
Marcel Aymé, French author, playwright, and screenwriter (died 1967)
JoignyWikipedia: Marcel Aymé - 1972
Priti Patel, British Indian politician, Secretary of State for the Home Department
HarrowWikipedia: Priti Patel - 1769
Jean-de-Dieu Soult, French general and politician, 12th Prime Minister of France (died 1851)
Saint-Amans-SoultWikipedia: Jean-de-Dieu Soult - 1930
Anerood Jugnauth, Mauritian lawyer and politician, 4th President of Mauritius (died 2021)
Vacoas-PhoenixWikipedia: Anerood Jugnauth - 1869
Edwin Lutyens, British architect (died 1944)
LondonWikipedia: Edwin Lutyens - 1952
Teófilo Stevenson, Cuban boxer and engineer (died 2012)
Puerto PadreWikipedia: Teófilo Stevenson - 1873
Tullio Levi-Civita, Italian mathematician and academic (died 1941)
- 1885
Dezső Kosztolányi, Hungarian author and poet (died 1936)
SuboticaWikipedia: Dezső Kosztolányi - 1892
József Mindszenty, Hungarian cardinal (died 1975)
CsehimindszentWikipedia: József Mindszenty - 1912
Hanna Reitsch, German soldier and pilot (died 1979)
Jelenia GóraWikipedia: Hanna Reitsch - 1918
Pearl Bailey, American actress and singer (died 1990)
Newport NewsWikipedia: Pearl Bailey - 1919
Eileen Heckart, American actress (died 2001)
ColumbusWikipedia: Eileen Heckart - 1961
Amy Sedaris, American actress and comedian
EndicottWikipedia: Amy Sedaris - 1937
Gordon Milne, English footballer
PrestonWikipedia: Gordon Milne - 1958
Nouriel Roubini, Iranian-American economic consultant, economist and writer
IstanbulWikipedia: Nouriel Roubini - 1902
William Walton, English composer (died 1983)
- 1916
Eugene McCarthy, American poet and politician (died 2005)
WatkinsWikipedia: Eugene McCarthy - 1955
Marina Sirtis, British-American actress
HackneyWikipedia: Marina Sirtis - 1824
Ludwig Büchner, German physiologist, physician, and philosopher (died 1899)
DarmstadtWikipedia: Ludwig Büchner - 1942
Scott Wilson, American actor (died 2018)
AtlantaWikipedia: Scott Wilson - 1964
Catherine Cortez Masto, American attorney and politician
Las VegasWikipedia: Catherine Cortez Masto - 1989
James Tomkins, English footballer
BasildonWikipedia: James Tomkins - 1985
Fernando Amorebieta, Venezuelan footballer
CantauraWikipedia: Fernando Amorebieta - 1561
Santorio Santorio, Italian biologist (died 1636)
- 1950
Mory Kanté, Guinean vocalist (died 2020)
AlbadariaWikipedia: Mory Kanté - 1896
Wilhelm Ackermann, German mathematician (died 1962)
HerscheidWikipedia: Wilhelm Ackermann - 1961
Michael Winterbottom, English director and producer
BlackburnWikipedia: Michael Winterbottom - 1853
Elihu Thomson, English-American engineer and inventor (died 1937)
ManchesterWikipedia: Elihu Thomson - 1900
John McEwen, Australian farmer and politician, 18th Prime Minister of Australia (died 1980)
ChilternWikipedia: John McEwen - 1931
Aleksei Gubarev, Russian general, pilot and cosmonaut (died 2015)
Gvardeytsy villageWikipedia: Aleksei Gubarev - 1891
Yvan Goll, French-German poet and playwright (died 1950)
Saint-Dié-des-VosgesWikipedia: Yvan Goll - 1908
Arthur O'Connell, American actor (died 1981)
ManhattanWikipedia: Arthur O'Connell - 1187
Arthur I, Duke of Brittany, grandson of King Henry II of England (died 1203)
- 1890
Harold Spencer Jones, English astronomer (died 1960)
KensingtonWikipedia: Harold Spencer Jones
What is celebrated on 29 March
- Christian feast day: Armogastes
- Christian feast day: Berthold of Calabria
- Christian feast day: Gwynllyw
- Christian feast day: Jonas and Barachisius
- Christian feast day: Ludolph of Ratzeburg
- Christian feast day: March 29 (Eastern Orthodox liturgics)
- Boganda Day (Central African Republic)
- Commemoration of the 1947 Rebellion (Madagascar)
- National Vietnam War Veterans Day (United States)
- Day of the Young Combatant (Chile)
- Youth Day (Taiwan)
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.