A birthday on the globe
24 December on the globe: what happened in the world on this day, and who was born
For 24 December, the English Wikipedia lists 59 events and 207 births. 37 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 24 December through the years
The Earth on 24 December
The picture on the globe was assembled by NASA from satellite photographs taken in December 2004: the snow, the ice and the green are those of the month.
On 24 December the Sun passes straight overhead at noon along the parallel of 23.4° south. In London, the day lasts about 7 hours 50 minutes.
Beyond 67° south the Sun no longer sets; beyond 67° north 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 · Nikolauskirche, Oberndorf
1818
The first performance of "Silent Night" takes place in the Nikolauskirche in Oberndorf, Austria.
On the map: Nikolauskirche, Oberndorf.
Europe · Ensemble de Lancement Vega
1979
The first Ariane 1 rocket is launched from ELA-1 at the Guiana Space Centre.
On the map: Ensemble de Lancement Vega.
Africa · Cairo
1871
Aida, one of Giuseppe Verdi's most popular operas, made its debut in Cairo, Egypt.
On the map: Cairo.
Also on the day’s list of Wikipedia in Chinese.
Oceania · Kiritimati
1777
Kiritimati, also called Christmas Island, is discovered by James Cook.
On the map: Kiritimati.
Also on the day’s list of Wikipedia in Spanish, Romanian and Chinese.
North America · NORAD
1955
According to legend, the NORAD Tracks Santa program began after children began calling the Continental Air Defense Command Center to inquire about Santa Claus's whereabouts due to a misprinted phone number in an advertisement.
On the map: NORAD.
North America · United States Congress
1973
The U.S. Congress granted home rule to Washington, D.C., allowing the residents to elect their own mayor and a city council.
On the map: United States Congress.
24 December
Born on 24 December#
The English Wikipedia lists 207 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 24 December
1818
James Prescott Joule, English physicist and brewer (died 1889)
Place of birth: Salford.
Born on 24 December
1798
Adam Mickiewicz, Polish poet and playwright (died 1855)
Place of birth: Zavosse.
Born on 24 December
1922
Ava Gardner, American actress (died 1990)
Place of birth: Grabtown.
Born on 24 December
1868
Emanuel Lasker, German chess player, mathematician, and philosopher (died 1941)
Place of birth: Barlinek.
Born on 24 December
1971
Ricky Martin, Puerto Rican singer-songwriter and actor
Place of birth: Río Piedras.
Born in Britain and Ireland
1822
Matthew Arnold, English poet and critic (died 1888)
Place of birth: Laleham.
Born in Britain and Ireland
1945
Lemmy, English hard rock singer-songwriter and bass player (died 2015)
Place of birth: Burslem.
Born in Britain and Ireland
1991
Louis Tomlinson, English singer
Place of birth: Doncaster.
24 December
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: 24 December 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 24 December
The list is the English Wikipedia’s, in its own wording, as it stood in October 2026. 17 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.
- 502
Chinese emperor Xiao Yan names Xiao Tong his heir designate.
no place on the mapWikipedia: Emperor of China - 640
Pope John IV is elected, several months after his predecessor's death.
no place on the mapWikipedia: Pope John IV - 759
Tang dynasty poet Du Fu departs for Chengdu, where he is hosted by fellow poet Pei Di.
no place on the mapWikipedia: Tang dynasty - 971
Battle of Ayn Shams: The Fatimids under Jawhar defeat the Qarmatians at the gates of Cairo, putting an end to the First Qarmatian invasion of Egypt.
Africa · CairoWikipedia: First Qarmatian invasion of Egypt - 1144
The capital of the crusader County of Edessa falls to Imad ad-Din Zengi, the atabeg of Mosul and Aleppo.
Asia · Siege of EdessaWikipedia: Siege of Edessa - 1294
Pope Boniface VIII is elected, replacing St. Celestine V, who had resigned.
no place on the mapWikipedia: Pope Boniface VIII - 1500
A joint Venetian–Spanish fleet captures the Castle of St. George on the island of Cephalonia.
Europe · Siege of the Castle of Saint GeorgeWikipedia: Siege of the Castle of Saint George - 1737
The Marathas defeat the combined forces of the Mughal Empire, Rajputs of Jaipur, Nizam of Hyderabad, Nawab of Awadh and Nawab of Bengal in the Battle of Bhopal.
Africa · Battle of BhopalWikipedia: Battle of Bhopal - 1777
Kiritimati, also called Christmas Island, is discovered by James Cook.
Oceania · KiritimatiWikipedia: Kiritimati - 1800
The Plot of the rue Saint-Nicaise fails to kill Napoleon Bonaparte.
Europe · Plot of the rue Saint-NicaiseWikipedia: Plot of the rue Saint-Nicaise - 1814
Representatives of the United Kingdom and the United States sign the Treaty of Ghent, ending the War of 1812.
Europe · Hotel d'Hane-SteenhuyseWikipedia: Treaty of Ghent - 1818
The first performance of "Silent Night" takes place in the Nikolauskirche in Oberndorf, Austria.
Europe · Nikolauskirche, OberndorfWikipedia: Silent Night - 1846
British acquired Labuan from the Sultanate of Brunei for Great Britain.
Britain & Ireland · United Kingdom of Great Britain and IrelandWikipedia: Crown Colony of Labuan - 1865
Former Confederate officers Frank McCord, Richard Reed, John Lester, John Kennedy, J. Calvin Jones, and James Crowe form the Ku Klux Klan.
no place on the mapWikipedia: Ku Klux Klan - 1868
The Greek Presidential Guard is established as the royal escort by King George I.
no place on the mapWikipedia: Presidential Guard - 1871
Aida, one of Giuseppe Verdi's most popular operas, made its debut in Cairo, Egypt.
Africa · CairoWikipedia: Aida - 1906
Reginald Fessenden transmits the first radio broadcast; consisting of a poetry reading, a violin solo, and a speech.
no place on the mapWikipedia: Reginald Fessenden - 1913
The Italian Hall disaster in Calumet, Michigan results in the deaths of 73 striking workers families at a Christmas party participants (including 59 children) when someone falsely yells "fire".
North America · Italian Hall disasterWikipedia: Italian Hall disaster - 1914
World War I: The "Christmas truce" begins.
no place on the mapWikipedia: World War I - 1918
Region of Međimurje is captured by the Kingdom of Serbs, Croats and Slovenes from Hungary.
Europe · 1918 occupation of MeđimurjeWikipedia: 1918 occupation of Međimurje - 1920
Gabriele D'Annunzio surrendered the Italian Regency of Carnaro in the city of Fiume to Italian Armed Forces.
Europe · RijekaWikipedia: Gabriele D'Annunzio - 1924
Albania becomes a republic.
Europe · AlbaniaWikipedia: Albania - 1925
Winnie-the-Pooh first appeared by name in a children's story in the London Evening News.
no place on the mapWikipedia: Winnie-the-Pooh - 1929
A four alarm fire breaks out in the West Wing of the White House in Washington, D.C.
North America · West WingWikipedia: West Wing - 1929
Assassination attempt on Argentine President Hipólito Yrigoyen.
Latin America · ArgentinaWikipedia: Argentina - 1939
World War II: Pope Pius XII makes a Christmas Eve appeal for peace.
no place on the mapWikipedia: World War II - 1941
World War II: Benghazi is conquered by the British Eighth Army.
Africa · BenghaziWikipedia: Benghazi - 1941
World War II: Kuching is conquered by Japanese forces.
Asia · KuchingWikipedia: Kuching - 1942
World War II: French monarchist, Fernand Bonnier de La Chapelle, assassinates Vichy French Admiral François Darlan in Algiers, Algeria.
Africa · AlgiersWikipedia: Monarchism in France - 1943
World War II: U.S. General Dwight D. Eisenhower is named Supreme Allied Commander for Operation Overlord.
Europe · Operation OverlordWikipedia: Operation Overlord - 1944
World War II: The Belgian Troopship Leopoldville was torpedoed and sank with the loss of 763 soldiers and 56 crew.
no place on the mapWikipedia: SS Léopoldville - 1945
Five of nine children become missing after their home in Fayetteville, West Virginia, is burned down.
North America · Sodder children disappearanceWikipedia: Sodder children disappearance - 1951
Libya becomes independent. Idris I is proclaimed King of Libya.
Africa · LibyaWikipedia: Libya - 1952
First flight of Britain's Handley Page Victor strategic bomber.
no place on the mapWikipedia: Handley Page Victor - 1953
Tangiwai disaster: In New Zealand's North Island, at Tangiwai, a railway bridge is damaged by a lahar and collapses beneath a passenger train, killing 151 people.
Oceania · TangiwaiWikipedia: Tangiwai disaster - 1955
A flood devastates California, killing 74 people across portions of the state.
no place on the mapWikipedia: 1955 Yuba–Sutter floods - 1955
According to legend, the NORAD Tracks Santa program began after children began calling the Continental Air Defense Command Center to inquire about Santa Claus's whereabouts due to a misprinted phone number in an advertisement.
North America · NORADWikipedia: NORAD - 1964
Flying Tiger Line Flight 282 crashes after takeoff from San Francisco International Airport, killing three.
North America · Flying Tiger Line Flight 282Wikipedia: Flying Tiger Line Flight 282 - 1964
Vietnam War: Viet Cong operatives bomb the Brinks Hotel in Saigon, South Vietnam to demonstrate they can strike an American installation in the heavily guarded capital.
Asia · 1964 Brinks Hotel bombingWikipedia: Vietnam War - 1966
A Canadair CL-44 chartered by the United States military crashes into a small village in South Vietnam, killing 111.
Asia · Da NangWikipedia: 1966 Flying Tiger Line Canadair CL-44 crash - 1968
Allegheny Airlines Flight 736 crashes on approach to Bradford Regional Airport, killing 20.
North America · Allegheny Airlines Flight 736Wikipedia: Allegheny Airlines Flight 736 - 1968
Apollo program: The crew of Apollo 8 enters into orbit around the Moon, becoming the first humans to do so. They performed ten lunar orbits, took the Earthrise photograph, broadcast live TV pictures, and read the first ten verses of Genesis.
no place on the mapWikipedia: Apollo 8 Genesis reading - 1969
Nigerian troops capture Umuahia, the Biafran capital.
Africa · UmuahiaWikipedia: Umuahia - 1971
LANSA Flight 508 is struck by lightning and crashes in the Puerto Inca District in the Department of Huánuco in Peru, killing 91.
Latin America · Puerto Inca DistrictWikipedia: LANSA Flight 508 - 1973
District of Columbia Home Rule Act is passed, allowing residents of Washington, D.C. to elect their own local government.
no place on the mapWikipedia: District of Columbia Home Rule Act - 1973
The U.S. Congress granted home rule to Washington, D.C., allowing the residents to elect their own mayor and a city council.
North America · United States CongressWikipedia: United States Congress - 1974
Cyclone Tracy devastates Darwin, Australia.
Oceania · DarwinWikipedia: Cyclone Tracy - 1979
The Soviet government deployed troops in Afghanistan, starting the Soviet–Afghan War.
no place on the mapWikipedia: Soviet–Afghan War - 1979
The first Ariane 1 rocket is launched from ELA-1 at the Guiana Space Centre.
Europe · Ensemble de Lancement VegaWikipedia: Ariane 1 - 1983
Aeroflot Flight 601 crashes during takeoff from Leshukonskoye Airport, Russia, killing 44 of the 49 people on board.
Europe · Aeroflot Flight 601Wikipedia: Aeroflot Flight 601 - 1994
Air France Flight 8969 is hijacked on the ground at Houari Boumediene Airport, Algiers, Algeria. Over the course of three days three passengers are killed, as are all four terrorists.
Europe · Air France Flight 8969Wikipedia: Air France Flight 8969 - 1996
A Learjet 35 crashes into Smarts Mountain near Dorchester, New Hampshire, killing both pilots on board.
North America · 1996 New Hampshire Learjet 35 crashWikipedia: 1996 New Hampshire Learjet 35 crash - 1997
The Sid El-Antri massacre in Algeria kills between 50 and 100 people.
Africa · AlgeriaWikipedia: Sid El-Antri massacre - 1999
Indian Airlines Flight 814 is hijacked in Indian airspace between Kathmandu, Nepal, and Delhi, India. The aircraft landed at Kandahar in Afghanistan. The incident ended on December 31 with the release of 190 survivors (one passenger is killed).
Asia · Indian Airlines Flight 814Wikipedia: Indian Airlines Flight 814 - 2003
The Spanish police thwart an attempt by ETA to detonate 50 kg of explosives at 3:55 p.m. inside Madrid's busy Chamartín Station.
Europe · MadridWikipedia: ETA - 2005
Chad–Sudan relations: Chad declares a state of belligerence against Sudan following a December 18 attack on Adré, which left about 100 people dead.
Africa · Battle of AdréWikipedia: Battle of Adré - 2008
The Lord's Resistance Army, a Ugandan rebel group, begins a series of attacks against civilians in the Democratic Republic of the Congo, massacring more than 400.
no place on the mapWikipedia: 2008 Christmas massacres - 2018
A helicopter crash kills Martha Érika Alonso, first female Governor of Puebla, Mexico, and her husband Rafael Moreno Valle Rosas, former governor.
Latin America · 2018 Puebla helicopter crashWikipedia: 2018 Puebla helicopter crash - 2021
Burmese military forces commit the Mo So massacre, killing at least 44 civilians.
Asia · Mo So massacreWikipedia: Mo So massacre
Who was born on 24 December
In order of how many Wikipedia editions have an article about each. The first 60 of 207 are shown.
- 1818
James Prescott Joule, English physicist and brewer (died 1889)
- 1961
Ilham Aliyev, Azerbaijani businessman and politician, 4th President of Azerbaijan
- 1798
Adam Mickiewicz, Polish poet and playwright (died 1855)
ZavosseWikipedia: Adam Mickiewicz - 1957
Hamid Karzai, Afghan politician, 12th President of Afghanistan
- 1943
Tarja Halonen, Finnish lawyer and politician, 11th President of Finland
HelsinkiWikipedia: Tarja Halonen - 1166
John, King of England (died 1216)
Beaumont PalaceWikipedia: John, King of England - 3 BC
Galba, Roman emperor (died 69)
TerracinaWikipedia: Galba - 1922
Ava Gardner, American actress (died 1990)
GrabtownWikipedia: Ava Gardner - 1868
Emanuel Lasker, German chess player, mathematician, and philosopher (died 1941)
BarlinekWikipedia: Emanuel Lasker - 1971
Ricky Martin, Puerto Rican singer-songwriter and actor
Río PiedrasWikipedia: Ricky Martin - 1837
Empress Elisabeth of Austria (died 1898)
- 1981
Dima Bilan, Russian singer-songwriter and actor
Ust-DzhegutaWikipedia: Dima Bilan - 1973
Stephenie Meyer, American author and film producer
HartfordWikipedia: Stephenie Meyer - 1761
Selim III, Ottoman sultan (died 1808)
IstanbulWikipedia: Selim III - 1905
Howard Hughes, American businessman, engineer, and pilot (died 1976)
HoustonWikipedia: Howard Hughes - 1822
Matthew Arnold, English poet and critic (died 1888)
LalehamWikipedia: Matthew Arnold - 1934
Stjepan Mesić, Croatian lawyer and politician, 2nd President of Croatia
OrahovicaWikipedia: Stjepan Mesić - 1945
Lemmy, English hard rock singer-songwriter and bass player (died 2015)
BurslemWikipedia: Lemmy - 1845
George I of Greece (died 1913)
CopenhagenWikipedia: George I of Greece - 1940
Anthony Fauci, American physician, Director of National Institute of Allergy and Infectious Diseases
BrooklynWikipedia: Anthony Fauci - 1956
Anil Kapoor, Indian actor and producer
MumbaiWikipedia: Anil Kapoor - 1991
Louis Tomlinson, English singer
DoncasterWikipedia: Louis Tomlinson - 1969
Ed Miliband, British politician, Foreign Secretary
LondonWikipedia: Ed Miliband - 1998
Alexis Mac Allister, Argentine footballer
Santa RosaWikipedia: Alexis Mac Allister - 1843
Lydia Koidula, Estonian poet and playwright (died 1886)
VändraWikipedia: Lydia Koidula - 1997
Neeraj Chopra, Indian javelin thrower
Panipat districtWikipedia: Neeraj Chopra - 1822
Charles Hermite, French mathematician (died 1901)
- 1927
Mary Higgins Clark, American author (died 2020)
New York CityWikipedia: Mary Higgins Clark - 1886
Michael Curtiz, Hungarian-American actor, director, and producer (died 1962)
BudapestWikipedia: Michael Curtiz - 1946
Jeff Sessions, American lawyer and politician, 44th Attorney General of Alabama and 84th Attorney General of the United States
HybartWikipedia: Jeff Sessions - 1634
Mariana of Austria (died 1696)
- 1974
Marcelo Salas, Chilean footballer
TemucoWikipedia: Marcelo Salas - 1980
Stephen Appiah, Ghanaian footballer
- 1961
Mary Barra, American businesswoman, current CEO and chairwoman of General Motors
WaterfordWikipedia: Mary Barra - 1970
Amaury Nolasco, Puerto Rican actor
ViequesWikipedia: Amaury Nolasco - 1887
Louis Jouvet, French actor and producer (died 1951)
CrozonWikipedia: Louis Jouvet - 1910
Fritz Leiber, American author and poet (died 1992)
ChicagoWikipedia: Fritz Leiber - 1992
Serge Aurier, Ivorian footballer
OuragahioWikipedia: Serge Aurier - 1879
Alexandrine of Mecklenburg-Schwerin (died 1952)
- 1809
Kit Carson, American general (died 1868)
RichmondWikipedia: Kit Carson - 1961
Wade Williams, American actor
- 1919
Pierre Soulages, French artist (died 2022)
- 1974
Ryan Seacrest, American radio host and television personality, and producer
AtlantaWikipedia: Ryan Seacrest - 1754
George Crabbe, English priest, surgeon, and poet (died 1832)
AldeburghWikipedia: George Crabbe - 1892
Ruth Chatterton, American actress (died 1961)
New York CityWikipedia: Ruth Chatterton - 1588
Constance of Austria (died 1631)
- 1937
Félix, Brazilian footballer and manager (died 2012)
São PauloWikipedia: Félix - 1959
Lee Daniels, American director and producer
PhiladelphiaWikipedia: Lee Daniels - 1995
Anett Kontaveit, Estonian tennis player
TallinnWikipedia: Anett Kontaveit - 1966
Diedrich Bader, American actor
AlexandriaWikipedia: Diedrich Bader - 1978
Yıldıray Baştürk, German-Turkish footballer
- 1955
Clarence Gilyard, American actor and educator (died 2022)
Moses LakeWikipedia: Clarence Gilyard - 1962
Kate Spade, American fashion designer (died 2018)
Kansas CityWikipedia: Kate Spade - 1929
Lennart Skoglund, Swedish footballer (died 1975)
StockholmWikipedia: Lennart Skoglund - 1810
Wilhelm Marstrand, Danish painter and illustrator (died 1873)
CopenhagenWikipedia: Wilhelm Marstrand - 1906
Franz Waxman, German-American composer and conductor (died 1967)
ChorzówWikipedia: Franz Waxman - 1931
Mauricio Kagel, Argentinian-German composer and scholar (died 2008)
Buenos AiresWikipedia: Mauricio Kagel - 1954
José María Figueres, Costa Rican businessman and politician, President of Costa Rica (1994–1998)
San JoséWikipedia: José María Figueres - 1980
Maarja-Liis Ilus, Estonian pop musician
TallinnWikipedia: Maarja-Liis Ilus - 1389
John V, Duke of Brittany (died 1442)
What is celebrated on 24 December
- Christian feast day: Adela and Irmina
- Christian feast day: Paola Elisabetta Cerioli
- Christian feast day: Adam and Eve
- Christian feast day: December 24 (Eastern Orthodox liturgics)
- Christmas Eve (Christianity) and its related observances: Aðfangadagskvöld, the day when the 13th and the last Yule Lad arrives to towns. (Iceland)
- Christmas Eve (Christianity) and its related observances: Feast of the Seven Fishes (Italian Americans)
- Christmas Eve (Christianity) and its related observances: Juleaften (Denmark)/Julaften (Norway)/Julafton (Sweden)
- Christmas Eve (Christianity) and its related observances: Nittel Nacht (certain Orthodox Jewish denominations)
- Christmas Eve (Christianity) and its related observances: Nochebuena (Spain and Spanish-speaking countries)
- Christmas Eve (Christianity) and its related observances: The Declaration of Christmas Peace (Old Great Square of Turku, Finland's official Christmas City)
- Christmas Eve (Christianity) and its related observances: Wigilia (Poland)
- Christmas Eve (Christianity) and its related observances: Quviasukvik, the Inuit new year (Alaska, Canada, Greenland and Russia)
- Christmas Eve (Christianity) and its related observances: Kūčios (Lithuania)
- Independence Day (Libya)
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.