A birthday on the globe
23 May on the globe: what happened in the world on this day, and who was born
For 23 May, the English Wikipedia lists 59 events and 223 births. 34 of the events stand at their places as rays of light; five 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 23 May through the years
The Earth on 23 May
The picture on the globe was assembled by NASA from satellite photographs taken in May 2004: the snow, the ice and the green are those of the month.
On 23 May the Sun passes straight overhead at noon along the parallel of 20.6° north. In London, the day lasts about 16 hours.
Beyond 69° north the Sun no longer sets; beyond 69° 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.
Europe · Leipzig
1863
The General German Workers' Association, a precursor of the modern Social Democratic Party of Germany, is founded in Leipzig, Kingdom of Saxony.
On the map: Leipzig.
Also on the day’s list of Wikipedia in Spanish.
Europe · Grand Hotel Bucharest
1971
The Intercontinental Hotel in Bucharest opens, becoming the second-tallest building in the city.
On the map: Grand Hotel Bucharest.
Also on the day’s list of Wikipedia in Romanian.
Europe · International Court of Justice
2008
The International Court of Justice (ICJ) awards Middle Rocks to Malaysia and Pedra Branca (Pulau Batu Puteh) to Singapore, ending a 29-year territorial dispute between the two countries.
On the map: International Court of Justice.
Asia · Beijing
1951
Tibetans sign the Seventeen Point Agreement with China.
On the map: Beijing.
North America · Astor Library
1895
Backed by Samuel J. Tilden, the Astor Library and the Lenox Library agreed to merge and form the New York Public Library.
On the map: Astor Library.
North America · New York Public Library
1911
The New York Public Library is dedicated.
On the map: New York Public Library.
Also on the day’s list of Wikipedia in Romanian.
North America · New York City
1980
The Shining, the psychological horror film directed by Stanley Kubrick, is premiered on 10 screens in New York City and Los Angeles on the Memorial Day weekend.
On the map: New York City.
Also on the day’s list of Wikipedia in Chinese.
23 May
Born on 23 May#
The English Wikipedia lists 223 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 23 May
1707
Carl Linnaeus, Swedish botanist, physician, and zoologist (died 1778)
Place of birth: Råshult.
Born on 23 May
1891
Pär Lagerkvist, Swedish novelist, playwright, and poet, Nobel Prize laureate (died 1974)
Place of birth: Växjö.
Born on 23 May
1908
John Bardeen, American physicist and engineer, Nobel Prize laureate (died 1991)
Place of birth: Madison.
Born on 23 May
1951
Anatoly Karpov, Russian chess player
Place of birth: Zlatoust.
Born on 23 May
1991
Lena Meyer-Landrut, German singer-songwriter
Place of birth: Hanover.
Born in Britain and Ireland
1933
Joan Collins, English actress
Place of birth: London.
Born in Britain and Ireland
1997
Joe Gomez, English footballer
Place of birth: Catford.
Born in Britain and Ireland
1967
Philip Selway, English musician
Place of birth: Abingdon-on-Thames.
23 May
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: 23 May 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 23 May
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.
- 1040
The Seljuks defeat the Ghaznavids in the battle of Dandanaqan.
Asia · Battle of DandanaqanWikipedia: Battle of Dandanaqan - 1308
Robert the Bruce, king of Scots, defeats John Comyn, earl of Buchan, decisively in the battle of Inverurie.
Britain & Ireland · Battle of InverurieWikipedia: Battle of Inverurie - 1430
Joan of Arc is captured at the Siege of Compiègne by troops from the Burgundian faction.
Europe · Siege of CompiègneWikipedia: Siege of Compiègne - 1498
Girolamo Savonarola is burned at the stake in Florence, Italy.
Europe · FlorenceWikipedia: Girolamo Savonarola - 1533
The marriage of King Henry VIII to Catherine of Aragon is declared null and void.
no place on the mapWikipedia: Henry VIII - 1555
Gian Pietro Carafa became Pope Paul IV, beginning a tumultuous four-year papacy during which the Papal States suffered a serious military defeat.
Europe · Papal StatesWikipedia: Pope Paul IV - 1568
Dutch rebels led by Louis of Nassau defeat Jean de Ligne and his loyalist troops in the Battle of Heiligerlee, opening the Eighty Years' War.
Europe · Battle of HeiligerleeWikipedia: Battle of Heiligerlee - 1609
Official ratification of the Second Virginia Charter takes place.
no place on the mapWikipedia: Second Virginia Charter - 1618
The Third Defenestration of Prague precipitates the Thirty Years' War.
no place on the mapWikipedia: Defenestrations of Prague - 1706
John Churchill, 1st Duke of Marlborough, defeats a French army under Marshal François de Neufville, duc de Villeroy at the Battle of Ramillies.
Europe · Battle of RamilliesWikipedia: Battle of Ramillies - 1788
South Carolina became the eighth state to ratify the United States Constitution.
North America · South CarolinaWikipedia: South Carolina - 1793
Battle of Famars during the Flanders Campaign of the War of the First Coalition.
Europe · Battle of FamarsWikipedia: Battle of Famars - 1829
Accordion patent granted to Cyrill Demian in Vienna, Austrian Empire.
Europe · ViennaWikipedia: Accordion - 1844
Báb: A merchant of Shiraz announces that he is a Prophet and founds a religious movement. He is considered to be a forerunner of the Baháʼí Faith.
no place on the mapWikipedia: Báb - 1846
Mexican–American War: President Mariano Paredes of Mexico unofficially declares war on the United States.
no place on the mapWikipedia: Mexican–American War - 1862
American Civil War: Confederate troops under Stonewall Jackson defeated a Union force at the Battle of Front Royal in Virginia, taking around 700 prisoners.
North America · Battle of Front RoyalWikipedia: American Civil War - 1863
The General German Workers' Association, a precursor of the modern Social Democratic Party of Germany, is founded in Leipzig, Kingdom of Saxony.
Europe · LeipzigWikipedia: General German Workers' Association - 1873
The Canadian Parliament establishes the North-West Mounted Police, the forerunner of the Royal Canadian Mounted Police.
no place on the mapWikipedia: North-West Mounted Police - 1895
Backed by Samuel J. Tilden, the Astor Library and the Lenox Library agreed to merge and form the New York Public Library.
North America · Astor LibraryWikipedia: Astor Library - 1900
American Civil War: Sergeant William Harvey Carney is awarded the Medal of Honor for his heroism in the Assault on the Battery Wagner in 1863.
North America · Fort WagnerWikipedia: American Civil War - 1905
Abdul Hamid II, Sultan of the Ottoman Empire, publicly announces the creation of the Ullah millet for the Aromanians of the empire, which had been established one day earlier. For this reason, the Aromanian National Day is usually celebrated on May 23, although some do so on May 22 instead.
no place on the mapWikipedia: Abdul Hamid II - 1907
The unicameral Parliament of Finland gathers for its first plenary session.
no place on the mapWikipedia: Parliament of Finland - 1911
The New York Public Library is dedicated.
North America · New York Public LibraryWikipedia: New York Public Library - 1915
World War I: Italy joins the Allies, fulfilling its part of the Treaty of London.
Britain & Ireland · LondonWikipedia: World War I - 1919
Sheikh Mahmud Barzanji, a Kurdish sheikh and at-the-time governor of the Slêmanî Province of British Iraq, initiates the first Mahmud Barzanji revolt.
no place on the mapWikipedia: Mahmud Barzanji revolts - 1932
In Brazil, four students are shot and killed during a manifestation against the Brazilian dictator Getúlio Vargas, which resulted in the outbreak of the Constitutionalist Revolution several weeks later.
no place on the mapWikipedia: Constitutionalist Revolution - 1934
American bank robbers Bonnie and Clyde are ambushed by police and killed in Bienville Parish, Louisiana.
North America · Bienville Parish, LouisianaWikipedia: Bank robbery - 1934
The Auto-Lite strike culminates in the "Battle of Toledo", a five-day melée between 1,300 troops of the Ohio National Guard and 6,000 picketers.
no place on the mapWikipedia: Auto-Lite strike - 1939
The U.S. Navy submarine USS Squalus sinks off the coast of New Hampshire during a test dive, causing the death of 24 sailors and two civilian technicians. The remaining 32 sailors and one civilian naval architect are rescued the following day.
North America · New HampshireWikipedia: United States Navy - 1941
World War II: German paratroopers start a series of mass executions of Greek civilians in Missiria for their participation in the ongoing Battle of Crete.
Europe · Missiria executionsWikipedia: World War II - 1945
World War II: Germany's Flensburg Government under Karl Dönitz is dissolved when its members are arrested by British forces.
no place on the mapWikipedia: Flensburg Government - 1945
World War II: Heinrich Himmler, head of the Schutzstaffel, commits suicide while in Allied custody.
no place on the mapWikipedia: Heinrich Himmler - 1946
The start of a two-day tornado outbreak across the Central United States that spawned at least 15 significant tornadoes.
no place on the mapWikipedia: Tornado outbreak of May 23–24, 1946 - 1948
Thomas C. Wasson, the US Consul-General, is assassinated in Jerusalem, Israel.
Asia · JerusalemWikipedia: Thomas C. Wasson - 1949
Cold War: The Western occupying powers approve the Basic Law and establish a new German state, the Federal Republic of Germany.
no place on the mapWikipedia: Allied-occupied Germany - 1951
Tibetans sign the Seventeen Point Agreement with China.
Asia · BeijingWikipedia: Seventeen Point Agreement - 1960
A tsunami caused by an earthquake in Chile the previous day kills 61 people in Hilo, Hawaii.
Latin America · 1960 Valdivia earthquakeWikipedia: 1960 Valdivia earthquake - 1971
Seventy-eight people are killed when Aviogenex Flight 130 crashes on approach to Rijeka Airport in present-day Rijeka, Croatia (then the Socialist Federal Republic of Yugoslavia).
Europe · Aviogenex Flight 130Wikipedia: Aviogenex Flight 130 - 1971
The Intercontinental Hotel in Bucharest opens, becoming the second-tallest building in the city.
Europe · Grand Hotel BucharestWikipedia: Grand Hotel Bucharest - 1974
The Airbus A300, the first twin-engined wide-body airliner, went into service with Air France.
no place on the mapWikipedia: Air France - 1978
A Tupolev Tu-144 crashes near the Russian town of Yegoryevsk, killing two.
Europe · 1978 Yegoryevsk Tupolev Tu-144 crashWikipedia: 1978 Yegoryevsk Tupolev Tu-144 crash - 1980
The Shining, the psychological horror film directed by Stanley Kubrick, is premiered on 10 screens in New York City and Los Angeles on the Memorial Day weekend.
North America · New York CityWikipedia: The Shining - 1991
Aeroflot Flight 8556 crashes at Pulkovo Airport, killing 13.
Europe · Aeroflot Flight 8556Wikipedia: Aeroflot Flight 8556 - 1992
Italy's most prominent anti-mafia judge Giovanni Falcone, his wife and three body guards are killed by the Corleonesi clan with a half-ton bomb near Capaci, Sicily. His friend and colleague Paolo Borsellino will be assassinated less than two months later, making 1992 a turning point in the history of Italian Mafia prosecutions.
Europe · CapaciWikipedia: Giovanni Falcone - 1995
The first version of the Java programming language is released.
no place on the mapWikipedia: Java - 1998
The Good Friday Agreement is accepted in a referendum in Northern Ireland with roughly 75% voting yes.
Britain & Ireland · Northern IrelandWikipedia: Good Friday Agreement - 1999
Professional wrestler Owen Hart died immediately before a World Wrestling Federation match after dropping 70 feet (21 m) onto the ring during a botched entrance.
no place on the mapWikipedia: Over the Edge - 2002
The "55 parties" clause of the Kyoto Protocol is reached after its ratification by Iceland.
Europe · IcelandWikipedia: Kyoto Protocol - 2006
Alaskan stratovolcano Mount Cleveland erupts.
North America · Mount ClevelandWikipedia: Stratovolcano - 2008
The International Court of Justice (ICJ) awards Middle Rocks to Malaysia and Pedra Branca (Pulau Batu Puteh) to Singapore, ending a 29-year territorial dispute between the two countries.
Europe · International Court of JusticeWikipedia: International Court of Justice - 2013
A freeway bridge carrying Interstate 5 over the Skagit River collapses in Mount Vernon, Washington.
North America · I-5 Skagit River bridge collapseWikipedia: I-5 Skagit River bridge collapse - 2014
Seven people, including the perpetrator, are killed and another 14 injured in the Isla Vista attacks near the campus of University of California, Santa Barbara.
North America · Isla Vista attacksWikipedia: Isla Vista attacks - 2015
At least 30 people are killed as a result of floods and tornadoes in Texas, Oklahoma, and northern Mexico.
no place on the mapWikipedia: Tornado outbreak and floods of May 23–26, 2015 - 2016
Eight bombings are carried out by the Islamic State of Iraq and Syria in Jableh and Tartus, coastline cities in Syria. One hundred eighty-four people are killed and at least 200 people injured.
Asia · JablehWikipedia: Islamic State - 2016
Two suicide bombings, conducted by the Islamic State of Iraq and Syria, kill at least 45 potential army recruits in Aden, Yemen.
Asia · AdenWikipedia: Islamic State - 2017
Philippine President Rodrigo Duterte declares martial law in Mindanao, following the Maute's attack in Marawi.
Asia · Siege of MarawiWikipedia: Siege of Marawi - 2021
A cable car falls from a mountain near Lake Maggiore in northern Italy, killing 14 people.
Europe · Stresa–Mottarone cable car crashWikipedia: Stresa–Mottarone cable car crash - 2021
Ryanair Flight 4978 is forced to land by Belarusian authorities to detain dissident journalist Roman Protasevich.
Europe · Minsk National AirportWikipedia: Ryanair Flight 4978 - 2022
Anthony Albanese of the Australian Labor Party is sworn in as the 31st Prime Minister of Australia after winning the 2022 Australian federal election, ending 9 years of conservative rule.
no place on the mapWikipedia: 2022 Australian federal election
Who was born on 23 May
In order of how many Wikipedia editions have an article about each. The first 60 of 223 are shown.
- 1707
Carl Linnaeus, Swedish botanist, physician, and zoologist (died 1778)
RåshultWikipedia: Carl Linnaeus - 1891
Pär Lagerkvist, Swedish novelist, playwright, and poet, Nobel Prize laureate (died 1974)
- 1908
John Bardeen, American physicist and engineer, Nobel Prize laureate (died 1991)
MadisonWikipedia: John Bardeen - 1951
Anatoly Karpov, Russian chess player
ZlatoustWikipedia: Anatoly Karpov - 1991
Lena Meyer-Landrut, German singer-songwriter
- 1949
Alan García, Peruvian lawyer and politician, twice President of Peru (died 2019)
- 1900
Hans Frank, German lawyer and politician (died 1946)
KarlsruheWikipedia: Hans Frank - 1972
Rubens Barrichello, Brazilian race car driver
São PauloWikipedia: Rubens Barrichello - 1052
Philip I of France (died 1108)
Champagne-et-FontaineWikipedia: Philip I of France - 1848
Otto Lilienthal, German pilot and engineer (died 1896)
- 1883
Douglas Fairbanks, American actor, director, producer, and screenwriter (died 1939)
- 1933
Joan Collins, English actress
LondonWikipedia: Joan Collins - 1810
Margaret Fuller, American journalist and critic (died 1850)
CambridgeWikipedia: Margaret Fuller - 1925
Joshua Lederberg, American biologist and geneticist, Nobel Prize laureate (died 2008)
MontclairWikipedia: Joshua Lederberg - 1951
Antonis Samaras, Greek economist and politician, 185th Prime Minister of Greece
- 1961
Daniele Massaro, Italian footballer and manager
- 1844
ʻAbdu'l-Bahá, Iranian religious leader (died 1921)
TehranWikipedia: ʻAbdu'l-Bahá - 1790
Jules Dumont d'Urville, French admiral and explorer (died 1842)
Condé-sur-NoireauWikipedia: Jules Dumont d'Urville - 1734
Franz Mesmer, German physician and astrologer (died 1815)
IznangWikipedia: Franz Mesmer - 1934
Robert Moog, electronic engineer and inventor of the Moog synthesizer (died 2005)
New York CityWikipedia: Robert Moog - 1928
Rosemary Clooney, American singer and actress (died 2002)
MaysvilleWikipedia: Rosemary Clooney - 1997
Joe Gomez, English footballer
CatfordWikipedia: Joe Gomez - 1958
Drew Carey, American actor, game show host, and entrepreneur
ClevelandWikipedia: Drew Carey - 1984
Hugo Almeida, Portuguese footballer
Figueira da FozWikipedia: Hugo Almeida - 1980
Theofanis Gekas, Greek footballer
LarissaWikipedia: Theofanis Gekas - 1944
John Newcombe, Australian tennis player and sportscaster
SydneyWikipedia: John Newcombe - 1988
Angelo Ogbonna, Italian footballer
CassinoWikipedia: Angelo Ogbonna - 1917
Edward Norton Lorenz, American mathematician and meteorologist (died 2008)
West HartfordWikipedia: Edward Norton Lorenz - 1971
George Osborne, English journalist and politician, former Chancellor of the Exchequer
PaddingtonWikipedia: George Osborne - 1974
Jewel, American singer-songwriter, guitarist, actress, and poet
PaysonWikipedia: Jewel - 1986
Ryan Coogler, American film director and screenwriter
OaklandWikipedia: Ryan Coogler - 1965
Tom Tykwer, German director, producer, screenwriter, and composer
WuppertalWikipedia: Tom Tykwer - 1987
Bray Wyatt, American wrestler (died 2023)
BrooksvilleWikipedia: Bray Wyatt - 1865
Epitácio Pessoa, Brazilian jurist and politician, 11th President of Brazil (died 1942)
UmbuzeiroWikipedia: Epitácio Pessoa - 1884
Corrado Gini, Italian sociologist and demographer (died 1965)
Motta di LivenzaWikipedia: Corrado Gini - 1896
Felix Steiner, Russian-German SS officer (died 1966)
NesterovWikipedia: Felix Steiner - 1910
Artie Shaw, American clarinet player, composer, and bandleader (died 2004)
New York CityWikipedia: Artie Shaw - 1950
Martin McGuinness, Irish republican and Sinn Féin politician, Deputy First Minister of Northern Ireland (died 2017)
- 1965
Manuel Sanchís Hontiyuelo, Spanish footballer
- 1965
Melissa McBride, American actress
LexingtonWikipedia: Melissa McBride - 1996
Çağlar Söyüncü, Turkish footballer
- 1967
Philip Selway, English musician
Abingdon-on-ThamesWikipedia: Philip Selway - 1966
H. Jon Benjamin, American actor, comedian, writer, and producer
WorcesterWikipedia: H. Jon Benjamin - 1974
Manuela Schwesig, German politician, German Federal Minister of Family Affairs
Frankfurt (Oder)Wikipedia: Manuela Schwesig - 1924
Karlheinz Deschner, German author and activist (died 2014)
- 2001
Brennan Johnson, Welsh footballer
NottinghamWikipedia: Brennan Johnson - 1824
Ambrose Burnside, American general and politician, 30th Governor of Rhode Island (died 1881)
LibertyWikipedia: Ambrose Burnside - 1898
Josef Terboven, German soldier and politician (died 1945)
- 1996
Răzvan Marin, Romanian footballer
BucharestWikipedia: Răzvan Marin - 1729
Giuseppe Parini, Italian poet and educator (died 1799)
Bosisio PariniWikipedia: Giuseppe Parini - 1919
Betty Garrett, American actress, singer, and dancer (died 2011)
St. JosephWikipedia: Betty Garrett - 1931
Barbara Barrie, American actress
ChicagoWikipedia: Barbara Barrie - 1977
Richard Ayoade, British actor, director and writer
HammersmithWikipedia: Richard Ayoade - 1985
Sebastián Fernández, Uruguayan footballer
MontevideoWikipedia: Sebastián Fernández - 1617
Elias Ashmole, English astrologer and politician (died 1692)
LichfieldWikipedia: Elias Ashmole - 1908
Annemarie Schwarzenbach, Swiss author and photographer (died 1942)
- 1910
Scatman Crothers, American actor and comedian (died 1986)
Terre HauteWikipedia: Scatman Crothers - 1910
Franz Kline, American painter and academic (died 1962)
Wilkes-BarreWikipedia: Franz Kline - 1923
Alicia de Larrocha, Catalan-Spanish pianist (died 2009)
BarcelonaWikipedia: Alicia de Larrocha - 1952
Martin Parr, English photographer and journalist
What is celebrated on 23 May
- Aromanian National Day
- Christian feast day: Aaron the Illustrious (Syriac Orthodox Church)
- Christian feast day: Desiderius of Vienne
- Christian feast day: Giovanni Battista de' Rossi
- Christian feast day: Julia of Corsica
- Christian feast day: Michael of Synnada
- Christian feast day: Nicolaus Copernicus and Johannes Kepler (Episcopal Church (USA))
- Christian feast day: Quintian, Lucius and Julian
- Christian feast day: William of Perth
- Christian feast day: May 23 (Eastern Orthodox liturgics)
- Constitution Day (Germany)
- Labour Day (Jamaica)
- Students' Day (Mexico)
- World Turtle Day
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.