A birthday on the globe
25 March on the globe: what happened in the world on this day, and who was born
For 25 March, the English Wikipedia lists 62 events and 243 births. 29 of the events stand at their places as rays of light; 13 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 25 March through the years
The Earth on 25 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 25 March the Sun passes straight overhead at noon along the parallel of 2.0° north. In London, the day lasts about 12 hours 30 minutes.
Beyond 88° north the Sun no longer sets; beyond 88° 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 · Newington Butts Theatre
1576
Jerome Savage takes out a sub-lease to start the Newington Butts Theatre outside London.
On the map: Newington Butts Theatre.
Europe · Venice
421
Italian city Venice is founded with the dedication of the first church, that of San Giacomo di Rialto on the islet of Rialto.
On the map: Venice.
Europe · Pisa
1409
The Council of Pisa convenes, in an attempt to heal the Western Schism.
On the map: Pisa.
Also on the day’s list of Wikipedia in Spanish.
Europe · Treaty of Amiens
1802
The Treaty of Amiens is signed as a "Definitive Treaty of Peace" between France and the United Kingdom.
On the map: the coordinates Wikidata gives for the article “Treaty of Amiens”.
Also on the day’s list of Wikipedia in Spanish.
Asia · Boukoleon Palace
919
Romanos Lekapenos seizes the Boukoleon Palace in Constantinople and becomes regent of the Byzantine emperor Constantine VII.
On the map: Boukoleon Palace.
North America · Chain Island
1959
Chain Island is sold by the State of California to Russell Gallaway III, a Sacramento businessman who plans to use it as a "hunting and fishing retreat", for $5,258.20 ($58,072 in 2025).
On the map: Chain Island.
North America · Selma, Alabama
1965
Civil rights activists led by Martin Luther King Jr. successfully complete their four-day 50-mile (80 km) march from Selma to the capitol in Montgomery, Alabama.
On the map: Selma, Alabama.
North America · Kennedy Space Center
1979
The first fully functional Space Shuttle orbiter, Columbia, is delivered to the John F. Kennedy Space Center to be prepared for its first launch.
On the map: Kennedy Space Center.
Oceans · South Orkney Islands
1903
The Scottish National Antarctic Expedition anchored in the South Orkney Islands with the intention of establishing the first weather station in Antarctic territory.
On the map: South Orkney Islands.
25 March
Born on 25 March#
The English Wikipedia lists 243 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 25 March
1947
Elton John, English singer-songwriter, pianist, producer, and actor
Place of birth: Pinner.
Born on 25 March
1942
Aretha Franklin, American singer-songwriter and pianist (died 2018)
Place of birth: Memphis.
Born on 25 March
1881
Béla Bartók, Hungarian pianist and composer (died 1945)
Place of birth: Sânnicolau Mare.
Born on 25 March
1934
Gloria Steinem, American feminist activist, co-founded the Women's Media Center (died 2026)
Place of birth: Toledo.
Born on 25 March
1347
Catherine of Siena, Italian philosopher, theologian, and saint (died 1380)
Place of birth: Siena.
Born in Britain and Ireland
1908
David Lean, English director, producer, and screenwriter (died 1991)
Place of birth: Croydon.
Born in Britain and Ireland
1906
A. J. P. Taylor, English historian and academic (died 1990)
Place of birth: Birkdale.
Born in Britain and Ireland
1993
Sam Johnstone, English footballer
Place of birth: Preston.
25 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: 25 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 25 March
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 20 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.
- 410
The Southern Yan capital of Guanggu falls to the Jin dynasty general Liu Yu, ending the Southern Yan dynasty.
no place on the mapWikipedia: Southern Yan - 421
Italian city Venice is founded with the dedication of the first church, that of San Giacomo di Rialto on the islet of Rialto.
Europe · VeniceWikipedia: Rialto - 708
Election of Pope Constantine following the death of Pope Sisinnius. He would be the last pope to visit Constantinople until 1967.
no place on the mapWikipedia: Pope Constantine - 717
Theodosius III resigns the throne to the Byzantine Empire to enter a monastery, allowing Leo III to take the throne and begin the Isaurian dynasty.
Asia · Byzantine EmpireWikipedia: Theodosius III - 919
Romanos Lekapenos seizes the Boukoleon Palace in Constantinople and becomes regent of the Byzantine emperor Constantine VII.
Asia · Boukoleon PalaceWikipedia: Romanos I Lekapenos - 1000
Fatimid caliph al-Hakim bi-Amr Allah assassinates the eunuch chief minister Barjawan and assumes control of the government.
no place on the mapWikipedia: Fatimid Caliphate - 1065
The Great German Pilgrimage is attacked on Good Friday by Beduin bandits, suffering heavy losses.
no place on the mapWikipedia: Great German Pilgrimage of 1064–65 - 1221
Coronation of Robert of Courtenay as Emperor of the Latin Empire.
no place on the mapWikipedia: Robert of Courtenay - 1306
Robert the Bruce becomes King of Scots (Scotland).
no place on the mapWikipedia: Robert the Bruce - 1409
The Council of Pisa convenes, in an attempt to heal the Western Schism.
Europe · PisaWikipedia: Council of Pisa - 1410
The Yongle Emperor of Ming China launches the first of his military campaigns against the Mongols, resulting in the fall of the Mongol khan Bunyashiri.
Asia · Ming dynastyWikipedia: Yongle Emperor's campaigns against the Mongols - 1458
Wars of the Roses: A formal reconciliation ceremony between the Lancastrians and Yorkists led to a brief period of peace.
Britain & Ireland · Old St Paul's CathedralWikipedia: Wars of the Roses - 1519
Hernán Cortés, entering province of Tabasco, defeats Tabascan Indians.
Latin America · TabascoWikipedia: Hernán Cortés - 1576
Jerome Savage takes out a sub-lease to start the Newington Butts Theatre outside London.
Britain & Ireland · Newington Butts TheatreWikipedia: Newington Butts Theatre - 1584
Sir Walter Raleigh is granted a patent to colonize Virginia.
North America · VirginiaWikipedia: Walter Raleigh - 1655
Saturn's largest moon, Titan, is discovered by Christiaan Huygens.
no place on the mapWikipedia: Saturn - 1708
A French fleet anchors nears Fife Ness as part of the planned French invasion of Britain.
Britain & Ireland · Fife NessWikipedia: Planned French invasion of Britain - 1725
Bach's chorale cantata "Wie schön leuchtet der Morgenstern, BWV 1", is first performed on the Feast of the Annunciation, coinciding with Palm Sunday.
no place on the mapWikipedia: Chorale cantata - 1770
Daskalogiannis leads the people of Sfakia in the first Greek uprising against the Ottoman rule
Europe · SfakiaWikipedia: Daskalogiannis - 1776
American Revolutionary War: American Patriots conduct a Raid on Tybee Island, primarily seeking to capture runaway slaves who sought refuge with British forces stationed there.
no place on the mapWikipedia: American Revolutionary War - 1799
War of the Second Coalition: In their second battle in seven days, the French Army of the Danube and Habsburg forces battled for control of the Hegau region.
Europe · OstrachWikipedia: Army of the Danube - 1802
The Treaty of Amiens is signed as a "Definitive Treaty of Peace" between France and the United Kingdom.
Europe · Treaty of AmiensWikipedia: Treaty of Amiens - 1807
The Slave Trade Act, which abolished the Atlantic slave trade in the British Empire, received royal assent.
Britain & Ireland · British EmpireWikipedia: Slave Trade Act 1807 - 1807
The Swansea and Mumbles Railway, then known as the Oystermouth Railway, becomes the first passenger-carrying railway in the world.
no place on the mapWikipedia: Swansea and Mumbles Railway - 1811
Percy Bysshe Shelley is expelled from the University of Oxford for publishing the pamphlet The Necessity of Atheism.
Britain & Ireland · University of OxfordWikipedia: University of Oxford - 1821
Greek War of Independence: Traditional date of the start of the Greek War of Independence. The war had actually begun on 23 February 1821 (Julian calendar).
no place on the mapWikipedia: Greek War of Independence - 1845
New Zealand Legislative Council pass the first Militia Act constituting the New Zealand Army.
no place on the mapWikipedia: New Zealand Army - 1865
American Civil War: In Virginia during the Siege of Petersburg, Confederate forces temporarily capture Fort Stedman from the Union before being repulsed.
North America · Battle of Fort StedmanWikipedia: American Civil War - 1878
Last issue of the Bulletin de la Fédération jurassienne, the first or one of the first anarchist newspapers.
no place on the mapWikipedia: Bulletin de la Fédération jurassienne - 1894
Coxey's Army, the first significant American protest march, departs Massillon, Ohio for Washington, D.C.
North America · Massillon, OhioWikipedia: Coxey's Army - 1903
The Scottish National Antarctic Expedition anchored in the South Orkney Islands with the intention of establishing the first weather station in Antarctic territory.
Oceans · South Orkney IslandsWikipedia: Scottish National Antarctic Expedition - 1905
The Greek football club P.A.E. G.S. Diagoras is founded in the city of Rhodes.
Europe · RhodesWikipedia: P.A.E. G.S. Diagoras - 1911
Andrey Yushchinsky is murdered in Kiev, leading to the Beilis affair.
Europe · KyivWikipedia: Kyiv - 1911
In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
North America · Triangle Shirtwaist Factory fireWikipedia: Triangle Shirtwaist Factory fire - 1914
The Greek multi-sport club Aris Thessaloniki is founded in Thessaloniki.
Europe · ThessalonikiWikipedia: Aris Thessaloniki - 1915
The appointment of Mehmed Reshid as governor of Diyarbekir, Turkey, intensified the genocide of Syriac Christians by pro-Ottoman forces.
Asia · Diyarbekir vilayetWikipedia: Sayfo - 1917
The Georgian Orthodox Church restores its autocephaly abolished by Imperial Russia in 1811.
Asia · Russian EmpireWikipedia: Georgian Orthodox Church - 1917
World War I: A delayed action bomb left by German troops exploded in the town hall of Bapaume, France, killing 24 soldiers and civilians.
Europe · Bapaume town hall explosionWikipedia: World War I - 1918
The Belarusian People's Republic is established.
no place on the mapWikipedia: Belarusian People's Republic - 1919
The Tetiev pogrom occurs in Ukraine, becoming the prototype of mass murder during the Holocaust.
no place on the mapWikipedia: The Holocaust - 1924
On the anniversary of Greek Independence, Alexandros Papanastasiou proclaims the Second Hellenic Republic.
Europe · Second Hellenic RepublicWikipedia: Greek War of Independence - 1931
The Scottsboro Boys are arrested in Alabama and charged with rape.
North America · AlabamaWikipedia: Scottsboro Boys - 1932
The Tomb of the Unknown Soldier is unveiled in Athens.
Europe · Tomb of the Unknown SoldierWikipedia: Tomb of the Unknown Soldier - 1934
Enrico Fermi published his discovery of neutron-induced radioactivity, for which he was awarded the Nobel Prize in Physics.
no place on the mapWikipedia: Nobel Prize in Physics - 1941
The Kingdom of Yugoslavia joins the Axis powers with the signing of the Tripartite Pact.
Europe · Kingdom of YugoslaviaWikipedia: Tripartite Pact - 1947
An explosion in a coal mine in Centralia, Illinois kills 111.
North America · 1947 Centralia mine disasterWikipedia: 1947 Centralia mine disaster - 1948
The first successful tornado forecast predicts that a tornado will strike Tinker Air Force Base, Oklahoma.
North America · 1948 Tinker Air Force Base tornadoesWikipedia: 1948 Tinker Air Force Base tornadoes - 1949
More than 92,000 kulaks are suddenly deported from the Baltic states to Siberia.
no place on the mapWikipedia: Operation Priboi - 1957
The European Economic Community is established with West Germany, France, Italy, Belgium, Netherlands and Luxembourg as the first members.
Europe · LuxembourgWikipedia: European Economic Community - 1957
United States Customs seizes copies of Allen Ginsberg's poem "Howl" on obscenity grounds.
no place on the mapWikipedia: United States Customs and Border Protection - 1959
Chain Island is sold by the State of California to Russell Gallaway III, a Sacramento businessman who plans to use it as a "hunting and fishing retreat", for $5,258.20 ($58,072 in 2025).
North America · Chain IslandWikipedia: Chain Island - 1965
Civil rights activists led by Martin Luther King Jr. successfully complete their four-day 50-mile (80 km) march from Selma to the capitol in Montgomery, Alabama.
North America · Selma, AlabamaWikipedia: Selma to Montgomery marches - 1971
The Army of the Republic of Vietnam abandon an attempt to cut off the Ho Chi Minh trail in Laos.
Asia · LaosWikipedia: Operation Lam Son 719 - 1975
Faisal of Saudi Arabia is shot and killed by his nephew.
no place on the mapWikipedia: Faisal of Saudi Arabia - 1979
The first fully functional Space Shuttle orbiter, Columbia, is delivered to the John F. Kennedy Space Center to be prepared for its first launch.
North America · Kennedy Space CenterWikipedia: Space Shuttle - 1988
The Candle demonstration in Bratislava is the first mass demonstration of the 1980s against the communist regime in Czechoslovakia.
Europe · Candle demonstration in BratislavaWikipedia: Candle demonstration in Bratislava - 1995
WikiWikiWeb, the world's first wiki, and part of the Portland Pattern Repository, is made public by Ward Cunningham.
no place on the mapWikipedia: WikiWikiWeb - 1996
The European Union's Veterinarian Committee bans the export of British beef and its by-products as a result of mad cow disease (Bovine spongiform encephalopathy).
Europe · European UnionWikipedia: European Union - 2006
Capitol Hill massacre: A gunman kills six people before taking his own life at a party in Seattle's Capitol Hill neighborhood.
North America · Capitol Hill massacreWikipedia: Capitol Hill massacre - 2006
Protesters demanding a new election in Belarus, following the rigged 2006 Belarusian presidential election, clash with riot police. Opposition leader Aleksander Kozulin is among several protesters arrested.
Europe · BelarusWikipedia: 2006 Belarusian presidential election - 2008
Invasion of Anjouan began as Comoros and African Union forces launched an assault to remove Mohamed Bacar from power in Anjouan.
Africa · 2008 invasion of AnjouanWikipedia: 2008 invasion of Anjouan - 2018
Syrian civil war: Following the completion of the Afrin offensive, the Syrian Democratic Forces (SDF) initiate an insurgency against the Turkish occupation of the Afrin District.
Asia · Operation Olive BranchWikipedia: Operation Olive Branch
Who was born on 25 March
In order of how many Wikipedia editions have an article about each. The first 60 of 243 are shown.
- 1947
Elton John, English singer-songwriter, pianist, producer, and actor
PinnerWikipedia: Elton John - 1942
Aretha Franklin, American singer-songwriter and pianist (died 2018)
MemphisWikipedia: Aretha Franklin - 1881
Béla Bartók, Hungarian pianist and composer (died 1945)
Sânnicolau MareWikipedia: Béla Bartók - 1972
Naftali Bennett, Israeli politician, 13th Prime Minister of Israel
- 1934
Gloria Steinem, American feminist activist, co-founded the Women's Media Center (died 2026)
- 1347
Catherine of Siena, Italian philosopher, theologian, and saint (died 1380)
- 1914
Norman Borlaug, American agronomist and humanitarian, Nobel Prize laureate (died 2009)
- 1965
Sarah Jessica Parker, American actress, producer, and designer
NelsonvilleWikipedia: Sarah Jessica Parker - 1767
Joachim Murat, French general (died 1815)
Labastide-MuratWikipedia: Joachim Murat - 1921
Simone Signoret, French actress (died 1985)
WiesbadenWikipedia: Simone Signoret - 1867
Arturo Toscanini, Italian-American cellist and conductor (died 1957)
- 1982
Jenny Slate, American comedian, actress and author
MiltonWikipedia: Jenny Slate - 1928
Jim Lovell, American captain, pilot, and astronaut (died 2025)
ClevelandWikipedia: Jim Lovell - 1611
Evliya Çelebi, Ottoman Turk traveller and writer (died 1682)
IstanbulWikipedia: Evliya Çelebi - 1908
David Lean, English director, producer, and screenwriter (died 1991)
CroydonWikipedia: David Lean - 1999
Mikey Madison, American actress
Los AngelesWikipedia: Mikey Madison - 1962
Marcia Cross, American actress
MarlboroughWikipedia: Marcia Cross - 1479
Vasili III of Russia (died 1533)
- 1925
Flannery O'Connor, American short story writer and novelist (died 1964)
SavannahWikipedia: Flannery O'Connor - 1976
Wladimir Klitschko, Ukrainian boxer
- 1259
Andronikos II Palaiologos, Byzantine emperor (died 1332)
- 1297
Andronikos III Palaiologos, Byzantine emperor (died 1341)
ConstantinopleWikipedia: Andronikos III Palaiologos - 1965
Stefka Kostadinova, Bulgarian high jumper
- 1808
José de Espronceda, Spanish poet and author (died 1842)
AlmendralejoWikipedia: José de Espronceda - 1906
A. J. P. Taylor, English historian and academic (died 1990)
BirkdaleWikipedia: A. J. P. Taylor - 1782
Caroline Bonaparte, French daughter of Carlo Buonaparte (died 1839)
- 1984
Katharine McPhee, American singer-songwriter and actress
Los AngelesWikipedia: Katharine McPhee - 1538
Christopher Clavius, German mathematician and astronomer (died 1612)
- 1989
Aly Michalka, American singer-songwriter and guitarist
TorranceWikipedia: Aly Michalka - 1252
Conradin, Duke of Swabia (died 1268)
Burgruine WolfsteinWikipedia: Conradin - 1901
Ed Begley, American actor (died 1970)
HartfordWikipedia: Ed Begley - 1921
Alexandra of Yugoslavia, the last Queen of Yugoslavia (died 1993)
- 1948
Bonnie Bedelia, American actress
ManhattanWikipedia: Bonnie Bedelia - 1982
Danica Patrick, American race car driver
- 1987
Victor Obinna, Nigerian footballer
- 1993
Sam Johnstone, English footballer
PrestonWikipedia: Sam Johnstone - 1541
Francesco I de' Medici, Grand Duke of Tuscany (died 1587)
- 1699
Johann Adolph Hasse, German singer and composer (died 1783)
BergedorfWikipedia: Johann Adolph Hasse - 1920
Patrick Troughton, English actor (died 1987)
Mill HillWikipedia: Patrick Troughton - 1926
László Papp, Hungarian boxer (died 2003)
BudapestWikipedia: László Papp - 1960
Brenda Strong, American actress
PortlandWikipedia: Brenda Strong - 1988
Big Sean, American rapper, singer and songwriter
Santa MonicaWikipedia: Big Sean - 1867
Gutzon Borglum, American sculptor, designed Mount Rushmore (died 1941)
St. CharlesWikipedia: Gutzon Borglum - 2000
Ozan Kabak, Turkish footballer
ÇankayaWikipedia: Ozan Kabak - 1741
Jean-Antoine Houdon, French sculptor and educator (died 1828)
VersaillesWikipedia: Jean-Antoine Houdon - 1873
Rudolf Rocker, German-American author and activist (died 1958)
- 1921
Nancy Kelly, American actress (died 1995)
LowellWikipedia: Nancy Kelly - 1986
Marco Belinelli, Italian basketball player
San Giovanni in PersicetoWikipedia: Marco Belinelli - 1986
Kyle Lowry, American basketball player
PhiladelphiaWikipedia: Kyle Lowry - 1345
Blanche of Lancaster (died 1369)
Bolingbroke CastleWikipedia: Blanche of Lancaster - 1953
Vesna Pusić, Croatian sociologist and politician, Deputy Prime Minister of Croatia
ZagrebWikipedia: Vesna Pusić - 1989
Scott Sinclair, English footballer
- 1994
Justine Dufour-Lapointe, Canadian skier
- 1924
Roberts Blossom, American actor (died 2011)
New HavenWikipedia: Roberts Blossom - 1924
Machiko Kyō, Japanese actress (died 2019)
- 1958
John Ensign, American physician and politician
RosevilleWikipedia: John Ensign - 1876
Irving Baxter, American high jumper and pole vaulter (died 1957)
- 1926
Riz Ortolani, Italian composer and conductor (died 2014)
PesaroWikipedia: Riz Ortolani - 1929
Cecil Taylor, American pianist and composer (died 2018)
New York CityWikipedia: Cecil Taylor - 1972
Phil O'Donnell, Scottish footballer (died 2007)
BellshillWikipedia: Phil O'Donnell
What is celebrated on 25 March
- Anniversary of the Arengo and the Feast of the Militants (San Marino)
- Christian feast days: Feast of the Annunciation
- Christian feast days: March 25 (Eastern Orthodox liturgics)
- Christian Saints' days Ælfwold II of Sherborne
- Christian Saints' days Blessed Marie-Alphonsine Danil Ghattas
- Christian Saints' days Omelyan Kovch (Ukrainian Greek Catholic Church)
- Christian Saints' days Dismas, the "Good Thief"
- Christian Saints' days Hilary Paweł Januszewski
- Christian Saints' days Humbert of Maroilles
- Christian Saints' days Josaphata Hordashevska
- Christian Saints' days Margaret Clitherow
- Christian Saints' days Procopius of Sázava
- Christian Saints' days Quirinus of Tegernsee
- Commemoration Day for the Victims of Communist Genocide (Latvia)
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.