A birthday on the globe
31 August on the globe: what happened in the world on this day, and who was born
For 31 August, the English Wikipedia lists 61 events and 257 births. 31 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 31 August through the years
The Earth on 31 August
The picture on the globe was assembled by NASA from satellite photographs taken in August 2004: the snow, the ice and the green are those of the month.
On 31 August the Sun passes straight overhead at noon along the parallel of 8.6° north. In London, the day lasts about 13 hours 40 minutes.
Beyond 81° north the Sun no longer sets; beyond 81° 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 · Isle of Wight Festival 1969
1969
On the final day of the Isle of Wight Festival 1969, attended by approximately 150,000 people over three days, Bob Dylan appeared in his first gig in three years.
On the map: the coordinates Wikidata gives for the article “Isle of Wight Festival 1969”.
Europe · Bergen
1314
King Haakon V moves the capital of Norway from Bergen to Oslo.
On the map: Bergen.
Also on the day’s list of Wikipedia in Romanian and Chinese.
31 August
What the other Wikipedias remember#
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Chinese and were translated for this page.
From Wikipedia in Chinese · Charter of the United Nations
1965
Amendments to Articles 23, 27 and 61 of the UN Charter are adopted, enlarging the Security Council of the United Nations and expanding its powers.
On the map: Charter of the United Nations.
Translated from the list on Wikipedia in Chinese.
31 August
Born on 31 August#
The English Wikipedia lists 257 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 31 August
1870
Maria Montessori, Italian physician and educator (died 1952)
Place of birth: Chiaravalle.
Born on 31 August
1811
Théophile Gautier, French poet and critic (died 1872)
Place of birth: Tarbes.
Born on 31 August
1949
Richard Gere, American actor and producer
Place of birth: Philadelphia.
Born on 31 August
1821
Hermann von Helmholtz, German physician and physicist (died 1894)
Place of birth: Potsdam.
Born in Britain and Ireland
1945
Van Morrison, Northern Irish singer-songwriter
Place of birth: Belfast.
Born in Britain and Ireland
1921
Raymond Williams, Welsh author and academic (died 1988)
Place of birth: Pandy.
Born in Britain and Ireland
1913
Bernard Lovell, English physicist and astronomer (died 2012)
Place of birth: Oldland Common.
31 August
Number one in the charts that week
At the cinema
An animal recorded that day
The record can be seen in GBIF, which brings together wildlife records from around the world.
All your birthdays
The weather that day
Data: Met Office Hadley Centre (HadCET); NOAA (GHCN-Daily, Mauna Loa).
Above the Earth
Sources: Jonathan McDowell, GCAT (launches); GFZ Potsdam (Kp index). Days are counted in Universal Time.
Football that day
International matches played that day:
Source: the “International football results” dataset kept by Mart Jürisoo (CC0).
Also that day
The earthquake’s page at the USGS
Source: the USGS catalogue. The day is counted in Universal Time (UTC).
In those days
Make a link for someone
Type the name, pick the day and the year of birth. The link opens straight on their day, with their name in the greeting.
The link carries the name, date and place typed here; anyone who gets it can see them.
Put another birthday beside it
Your mother’s, your child’s, a friend’s: the two days appear side by side.
Below: 31 August through the years.
The whole globe of the day
Drag the globe to turn it. Touch a ray or a point to read what happened there.
Everything Wikipedia lists for 31 August
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.
- 1056
After a sudden gastric illness, Byzantine Empress Theodora dies childless, thus ending the Macedonian dynasty.
no place on the mapWikipedia: List of Roman and Byzantine empresses - 1218
Al-Kamil becomes sultan of the Ayyubid dynasty.
no place on the mapWikipedia: Al-Kamil - 1302
Frederick III of Aragon and Charles, Count of Valois sign the Peace of Caltabellotta, which ends the War of the Sicilian Vespers and divides the old Kingdom of Sicily into an island portion and a peninsular portion.
Europe · CaltabellottaWikipedia: Peace of Caltabellotta - 1314
King Haakon V moves the capital of Norway from Bergen to Oslo.
Europe · BergenWikipedia: Haakon V - 1420
The 8.8–9.4 Caldera earthquake shakes Chile's Atacama Region causing tsunami in Chile, Hawaii, and Japan.
Latin America · 1420 Caldera earthquakeWikipedia: 1420 Caldera earthquake - 1422
King Henry V of England dies of dysentery while in France and his son, Henry VI, becomes king at the age of nine months.
no place on the mapWikipedia: Henry V of England - 1483
Under the influence of the Ottoman government, patriarch Symeon I convenes a synod of the Eastern Orthodox Churches in Constantinople which defines the ritual for admitting Catholics to the Eastern Orthodox Churches and condemns the church union of Ferrara-Florence.
Europe · Council of FlorenceWikipedia: Synod of Constantinople - 1776
William Livingston, the first Governor of New Jersey, begins serving his first term.
no place on the mapWikipedia: William Livingston - 1795
War of the First Coalition: The British capture Trincomalee (present-day Sri Lanka) from the Dutch in order to keep it out of French hands.
Asia · Invasion of CeylonWikipedia: Invasion of Ceylon - 1798
Irish Rebellion: Irish rebels, with French assistance, establish the short-lived Republic of Connacht.
Britain & Ireland · Irish RepublicWikipedia: Irish Rebellion of 1798 - 1813
Peninsular War: Spanish troops repel a French attack in the Battle of San Marcial.
Europe · Battle of San MarcialWikipedia: Battle of San Marcial - 1814
War of 1812: American militia forces repelled a British force at the Battle of Caulk's Field, killing 41 people including Captain Peter Parker of the Royal Navy.
North America · Battle of Caulk's FieldWikipedia: Battle of Caulk's Field - 1864
American Civil War: The Battle of Jonesborough, the culmination of the Atlanta campaign, begins as Union forces under General William T. Sherman clash with Confederate troops under General William J. Hardee south of Atlanta.
North America · Battle of JonesboroughWikipedia: American Civil War - 1876
Ottoman Sultan Murad V is deposed and succeeded by his brother, Abdul Hamid II.
no place on the mapWikipedia: List of sultans of the Ottoman Empire - 1886
The 7.0 Mw Charleston earthquake strikes southeastern South Carolina with a maximum Mercalli intensity of X (Extreme), killing 60 people and causing damage worth an estimated at $5 to $6 million.
North America · 1886 Charleston earthquakeWikipedia: 1886 Charleston earthquake - 1888
Mary Ann Nichols, the first of Jack the Ripper's confirmed victims, is murdered.
no place on the mapWikipedia: Mary Ann Nichols - 1895
German Count Ferdinand von Zeppelin patents his navigable balloon.
no place on the mapWikipedia: Ferdinand von Zeppelin - 1897
Thomas Edison was granted a patent for the Kinetoscope, a precursor to the modern movie projector.
no place on the mapWikipedia: Thomas Edison - 1907
Russia and the United Kingdom sign the Anglo-Russian Convention, by which the UK recognizes Russian preeminence in northern Persia, while Russia recognizes British preeminence in southeastern Persia and Afghanistan. Both powers pledge not to interfere in Tibet.
no place on the mapWikipedia: Anglo-Russian Convention - 1918
World War I: Start of the Battle of Mont Saint-Quentin, a successful assault by the Australian Corps during the Hundred Days Offensive.
Europe · Hundred Days OffensiveWikipedia: World War I - 1920
Polish–Soviet War: A decisive Polish victory in the Battle of Komarów.
Europe · Central and Eastern EuropeWikipedia: Polish–Soviet War - 1933
The Integral Nationalist Group wins the 1933 Andorran parliamentary election, the first election in Andorra held with universal male suffrage.
Europe · AndorraWikipedia: 1933 Andorran parliamentary election - 1935
In an attempt to stay out of the growing tensions concerning Germany and Japan, the United States passes the first of its Neutrality Acts.
no place on the mapWikipedia: Neutrality Acts of the 1930s - 1936
Radio Prague, now the official international broadcasting station of the Czech Republic, goes on the air.
no place on the mapWikipedia: Radio Prague International - 1939
Nazi Germany mounts a false flag attack on the Gleiwitz radio station, creating an excuse to attack Poland the following day, thus starting World War II in Europe.
Europe · Gleiwitz incidentWikipedia: Gleiwitz incident - 1940
Pennsylvania Central Airlines Trip 19 crashes near Lovettsville, Virginia. The CAB investigation of the accident is the first investigation to be conducted under the Bureau of Air Commerce act of 1938.
North America · Lovettsville air disasterWikipedia: Lovettsville air disaster - 1940
Second World War: Two Royal navy destroyers were lost to mines and two other vessels damaged off Texel, Netherlands, killing around 300 men.
Europe · TexelWikipedia: World War II - 1941
World War II: Serbian paramilitary forces defeat Germans in the Battle of Loznica.
Europe · LoznicaWikipedia: Battle of Loznica - 1942
The Matagorda hurricane, the most intense and costliest tropical cyclone of the 1942 Atlantic hurricane season, dissipated after causing $26.5 million in damages and eight deaths.
no place on the mapWikipedia: 1942 Atlantic hurricane season - 1943
USS Harmon, the first U.S. Navy ship to be named after a black person, is commissioned.
no place on the mapWikipedia: USS Harmon - 1949
The retreat of the Democratic Army of Greece into Albania after its defeat on Gramos mountain marks the end of the Greek Civil War.
Europe · GramosWikipedia: Greek Civil War - 1950
TWA Flight 903 crashes near Itay El Barud, Egypt, killing all 55 aboard.
Africa · TWA Flight 903Wikipedia: TWA Flight 903 - 1957
The Federation of Malaya (now Malaysia) gains its independence from the United Kingdom.
no place on the mapWikipedia: Federation of Malaya - 1959
A parcel bomb sent by Ngô Đình Nhu, younger brother and chief adviser of South Vietnamese President Ngô Đình Diệm, fails to kill King Norodom Sihanouk of Cambodia.
no place on the mapWikipedia: Letter bomb - 1962
Trinidad and Tobago becomes independent.
Latin America · Trinidad and TobagoWikipedia: Trinidad and Tobago - 1963
Crown Colony of North Borneo (now Sabah) achieves self-governance.
Asia · SabahWikipedia: Crown Colony of North Borneo - 1968
Start of the Congress of Carrara, one of the major 20th century anarchist congresses.
no place on the mapWikipedia: Congress of Carrara - 1969
On the final day of the Isle of Wight Festival 1969, attended by approximately 150,000 people over three days, Bob Dylan appeared in his first gig in three years.
Britain & Ireland · Isle of Wight Festival 1969Wikipedia: Isle of Wight Festival 1969 - 1972
Aeroflot Flight 558 crashes in the Abzelilovsky District in Bashkortostan, Russia (then the Soviet Union), killing all 102 people aboard.
Europe · Aeroflot Flight 558Wikipedia: Aeroflot Flight 558 - 1986
Aeroméxico Flight 498 collides with a Piper PA-28 Cherokee over Cerritos, California, killing 67 in the air and 15 on the ground.
North America · Aeroméxico Flight 498Wikipedia: Aeroméxico Flight 498 - 1986
The Soviet passenger liner Admiral Nakhimov sinks in the Black Sea after colliding with the bulk carrier Pyotr Vasev, killing 423.
no place on the mapWikipedia: Soviet Union - 1987
Thai Airways Flight 365 crashes into the ocean near Ko Phuket, Thailand, killing all 83 aboard.
Asia · Thai Airways Flight 365Wikipedia: Thai Airways Flight 365 - 1988
CAAC Flight 301 overshoots the runway at Kai Tak Airport and crashes into Kowloon Bay, killing seven people.
Asia · CAAC Flight 301Wikipedia: CAAC Flight 301 - 1988
Delta Air Lines Flight 1141 crashes during takeoff from Dallas/Fort Worth International Airport, killing 14.
North America · Delta Air Lines Flight 1141Wikipedia: Delta Air Lines Flight 1141 - 1991
Kyrgyzstan declares its independence from the Soviet Union.
no place on the mapWikipedia: Kyrgyzstan - 1993
Russia completes removing its troops from Lithuania.
Europe · LithuaniaWikipedia: Lithuania - 1994
Argentina abolishes conscription after months of social backlash over the murder of a conscript.
Latin America · ArgentinaWikipedia: Argentina - 1994
Russia completes removing its troops from Estonia.
Europe · EstoniaWikipedia: Estonia - 1996
Saddam Hussein's troops seize Irbil after the Kurdish Masoud Barzani appealed for help to defeat his Kurdish rival PUK.
no place on the mapWikipedia: Saddam Hussein - 1997
Diana, Princess of Wales, her partner, Dodi Fayed, and driver Henri Paul die in a car crash in Paris.
Europe · Death of Diana, Princess of WalesWikipedia: Death of Diana, Princess of Wales - 1999
A LAPA Boeing 737-200 crashes during takeoff from Jorge Newbury Airport in Buenos Aires, killing 65, including two on the ground.
Latin America · LAPA Flight 3142Wikipedia: LAPA Flight 3142 - 1999
The first of a series of bombings in Moscow kills one person and wounds 40 others.
Europe · MoscowWikipedia: 1999 Russian apartment bombings - 2002
Typhoon Rusa, the most powerful typhoon to hit South Korea in 43 years, makes landfall, killing at least 236 people.
no place on the mapWikipedia: Typhoon Rusa - 2005
The 2005 Al-Aaimmah bridge stampede in Baghdad kills 953 people.
Asia · 2005 Al-Aimmah Bridge disasterWikipedia: 2005 Al-Aimmah Bridge disaster - 2006
Edvard Munch's famous painting, The Scream, stolen on August 22, 2004, is recovered in a raid by Norwegian police.
no place on the mapWikipedia: The Scream - 2010
The last episode of The Bill, the longest-running police drama in British television history, was broadcast.
no place on the mapWikipedia: The Bill - 2016
Brazil's President Dilma Rousseff is impeached and removed from office.
no place on the mapWikipedia: Dilma Rousseff - 2019
A sightseeing helicopter crashes in the mountains of Skoddevarre in Alta, Norway, killing all six people on board.
Europe · 2019 Alta helicopter crashWikipedia: 2019 Alta helicopter crash - 2024
A helicopter crashes in Kamchatka Krai in the Russian Far East, killing all 22 occupants.
Asia · 2024 Kamchatka Mil Mi-8 crashWikipedia: 2024 Kamchatka Mil Mi-8 crash - 2025
A landslide in the Darfur region of Sudan kills over 1000 people.
Africa · 2025 Tarasin landslideWikipedia: 2025 Tarasin landslide - 2025
An earthquake in eastern Afghanistan kills over 1400 people.
Asia · 2025 Kunar earthquakeWikipedia: 2025 Kunar earthquake
What the other Wikipedias remember
For these years the English list has nothing on this day. The events below come from the same day’s lists on Wikipedia in Chinese and were translated for this page.
- 1965
Amendments to Articles 23, 27 and 61 of the UN Charter are adopted, enlarging the Security Council of the United Nations and expanding its powers.
North America · Charter of the United NationsTranslated from the list on Wikipedia in ChineseWikipedia: 联合国宪章
Who was born on 31 August
In order of how many Wikipedia editions have an article about each. The first 60 of 257 are shown.
- 12
Caligula, Roman emperor (died 41)
AntiumWikipedia: Caligula - 1956
Tsai Ing-wen, Taiwanese politician and the President of the Republic of China
Zhongshan DistrictWikipedia: Tsai Ing-wen - 1870
Maria Montessori, Italian physician and educator (died 1952)
ChiaravalleWikipedia: Maria Montessori - 1960
Hassan Nasrallah, Lebanese politician, 3rd Secretary-General of Hezbollah (died 2024)
Bourj HammoudWikipedia: Hassan Nasrallah - 1985
Mohammed bin Salman, Crown Prince of Saudi Arabia
- 1811
Théophile Gautier, French poet and critic (died 1872)
- 1949
Richard Gere, American actor and producer
PhiladelphiaWikipedia: Richard Gere - 161
Commodus, Roman emperor (died 192)
LanuviumWikipedia: Commodus - 1821
Hermann von Helmholtz, German physician and physicist (died 1894)
- 1569
Jahangir, Mughal emperor (died 1627)
Fatehpur SikriWikipedia: Jahangir - 1880
Wilhelmina, queen of the Netherlands (died 1962)
Noordeinde PalaceWikipedia: Wilhelmina of the Netherlands - 1970
Queen Rania of Jordan
Kuwait CityWikipedia: Queen Rania of Jordan - 1982
Pepe Reina, Spanish footballer
MadridWikipedia: Pepe Reina - 1879
Taishō, Emperor of Japan (died 1926)
Akasaka EstateWikipedia: Emperor Taishō - 1908
William Saroyan, American novelist, playwright, and short story writer (died 1981)
- 1971
Chris Tucker, American comedian and actor
AtlantaWikipedia: Chris Tucker - 1928
James Coburn, American actor (died 2002)
LaurelWikipedia: James Coburn - 1949
Hugh David Politzer, American physicist and academic, Nobel Prize laureate
New York CityWikipedia: Hugh David Politzer - 1970
Nikola Gruevski, Macedonian economist and politician, 6th Prime Minister of the Republic of Macedonia
- 1897
Fredric March, American actor (died 1975)
RacineWikipedia: Fredric March - 1988
David Ospina, Colombian footballer
ItagüíWikipedia: David Ospina - 1919
Amrita Pritam, Indian poet and author (died 2005)
GujranwalaWikipedia: Amrita Pritam - 1945
Van Morrison, Northern Irish singer-songwriter
BelfastWikipedia: Van Morrison - 1907
Ramon Magsaysay, Filipino captain, engineer, and politician, 7th President of the Philippines (died 1957)
- 1945
Itzhak Perlman, Israeli-American violinist and conductor
Tel AvivWikipedia: Itzhak Perlman - 1879
Alma Mahler, Austrian-American composer and author (died 1964)
ViennaWikipedia: Alma Mahler - 1977
Jeff Hardy, American wrestler and singer
CameronWikipedia: Jeff Hardy - 1843
Georg von Hertling, German academic and politician, 7th Chancellor of the German Empire (died 1919)
DarmstadtWikipedia: Georg von Hertling - 1992
Nicolás Tagliafico, Argentine footballer
Rafael CalzadaWikipedia: Nicolás Tagliafico - 1991
Cédric Soares, Portuguese footballer
SingenWikipedia: Cédric Soares - 1834
Amilcare Ponchielli, Italian composer and educator (died 1886)
Paderno PonchielliWikipedia: Amilcare Ponchielli - 1955
Edwin Moses, American hurdler
DaytonWikipedia: Edwin Moses - 1962
Dee Bradley Baker, American voice actor
BloomingtonWikipedia: Dee Bradley Baker - 1907
Altiero Spinelli, Italian theorist and politician (died 1986)
- 1985
Rolando, Portuguese footballer
São VicenteWikipedia: Rolando - 1979
Mickie James, American wrestler
RichmondWikipedia: Mickie James - 1947
Somchai Wongsawat, Thai lawyer and politician, 26th Prime Minister of Thailand
Suan KhanWikipedia: Somchai Wongsawat - 1975
Sara Ramirez, Mexican-American actor and musician
MazatlánWikipedia: Sara Ramirez - 1976
Roque Júnior, Brazilian footballer and manager
Santa Rita do SapucaíWikipedia: Roque Júnior - 1921
Raymond Williams, Welsh author and academic (died 1988)
- 1925
Maurice Pialat, French actor and director (died 2003)
CunlhatWikipedia: Maurice Pialat - 1913
Bernard Lovell, English physicist and astronomer (died 2012)
Oldland CommonWikipedia: Bernard Lovell - 1924
Buddy Hackett, American actor and singer (died 2003)
BrooklynWikipedia: Buddy Hackett - 2001
Amanda Anisimova, American tennis player
Freehold TownshipWikipedia: Amanda Anisimova - 1948
Rudolf Schenker, German guitarist and songwriter
HildesheimWikipedia: Rudolf Schenker - 1966
Lyuboslav Penev, Bulgarian footballer and manager
DobrichWikipedia: Lyuboslav Penev - 1996
Jalen Brunson, American basketball player
New BrunswickWikipedia: Jalen Brunson - 2004
Jang Won-young, South Korean singer and model
- 1878
Frank Jarvis, American sprinter and lawyer (died 1933)
CaliforniaWikipedia: Frank Jarvis - 1953
Pavel Vinogradov, Russian astronaut and engineer
MagadanWikipedia: Pavel Vinogradov - 1969
Andrew Cunanan, American spree killer (died 1997)
- 1984
Ted Ligety, American skier
Salt Lake CityWikipedia: Ted Ligety - 1914
Richard Basehart, American actor (died 1984)
ZanesvilleWikipedia: Richard Basehart - 1928
Jaime Sin, Filipino cardinal (died 2005)
New WashingtonWikipedia: Jaime Sin - 1947
Luca Cordero di Montezemolo, Italian businessman
- 1970
Debbie Gibson, American singer-songwriter, producer, and actress
BrooklynWikipedia: Debbie Gibson - 1883
Ramón Fonst, Cuban fencer (died 1959)
HavanaWikipedia: Ramón Fonst - 1978
Philippe Christanval, French footballer
- 1993
Pablo Marí, Spanish football player
AlmussafesWikipedia: Pablo Marí - 1948
Holger Osieck, German footballer and manager
HombergWikipedia: Holger Osieck
What is celebrated on 31 August
- Baloch-Pakhtun Unity Day (Balochs and Pashtuns, International observance)
- Christian feast day: Aidan of Lindisfarne
- Christian feast day: Aristides of Athens
- Christian feast day: Cuthburh
- Christian feast day: Joseph of Arimathea
- Christian feast day: Nicodemus
- Christian feast day: Paulinus of Trier
- Christian feast day: Raymond Nonnatus
- Christian feast day: Wala of Corbie
- Christian feast day: August 31 (Eastern Orthodox liturgics)
- Day of Solidarity and Freedom (Poland)
- Departure Day, celebrates the withdrawal of American troops from Afghanistan
- Independence Day, celebrates the independence of Kyrgyzstan from the Soviet Union in 1991.
- Independence Day, celebrates the independence of Malaya from the United Kingdom in 1957.
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.