A centennial, or centenary in

British English British English is the set of Variety (linguistics), varieties of the English language native to the United Kingdom, especially Great Britain. More narrowly, it can refer specifically to the English language in England, or, more broadly, to ...

, is a 100th

anniversary An anniversary is the date on which an event took place or an institution was founded. Most countries celebrate national anniversaries, typically called national days. These could be the List of national independence days, date of independen ...

or otherwise relates to a

century A century is a period of 100 years or 10 decades. Centuries are numbered ordinally in English and many other languages. The word ''century'' comes from the Latin ''centum'', meaning ''one hundred''. ''Century'' is sometimes abbreviated as c. ...

Notable events

Notable centennial events at a national or world-level include: *

Centennial Exhibition The Centennial International Exhibition, officially the International Exhibition of Arts, Manufactures, and Products of the Soil and Mine, was held in Philadelphia, Pennsylvania, from May 10 to November 10, 1876. It was the first official wo ...

, 1876,

Philadelphia Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the Unit ...

, Pennsylvania. First official

World's Fair A world's fair, also known as a universal exhibition, is a large global exhibition designed to showcase the achievements of nations. These exhibitions vary in character and are held in different parts of the world at a specific site for a perio ...

in the United States, celebrating the 100th anniversary of the signing of the

Declaration of Independence A declaration of independence is an assertion by a polity in a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of the territory of another state or failed state, or are breaka ...

in Philadelphia. About 10 million visitors attended, equivalent to about 20% of the population of the United States at the time. The exhibition ran from May 10, 1876, to November 10, 1876. (It included a

monorail A monorail is a Rail transport, railway in which the track consists of a single rail or beam. Colloquially, the term "monorail" is often used to describe any form of elevated rail or people mover. More accurately, the term refers to the style ...

.) * New Zealand Centennial Exhibition, 1939–1940, celebrated one hundred years since the signing of the

Treaty of Waitangi The Treaty of Waitangi (), sometimes referred to as ''Te Tiriti'', is a document of central importance to the history of New Zealand, Constitution of New Zealand, its constitution, and its national mythos. It has played a major role in the tr ...

in 1840 and the subsequent mass European settlement of New Zealand. 2,641,043 (2.6 million) visitors attended the exhibition, which ran from 8 November 1939 until 4 May 1940. * 1967 International and Universal Exposition, better known as ''Expo 67'', celebrating Canada's centennial year. This "Category One"

held in

Montreal, Quebec Montreal is the List of towns in Quebec, largest city in the Provinces and territories of Canada, province of Quebec, the List of the largest municipalities in Canada by population, second-largest in Canada, and the List of North American cit ...

, Canada, from April 27 to October 29, 1967. Sixty-two nations participated, and it set the single-day attendance record for a world's fair, with 569,500 visitors on its third day. Official attendance was 50,306,648. Was endpoint of the Centennial Voyageur Canoe Pageant, the longest canoe race in history. (Its monorail was a major attraction.) * Atatürk Centennial, in memory of

Mustafa Kemal Atatürk Mustafa Kemal Atatürk ( 1881 – 10 November 1938) was a Turkish field marshal and revolutionary statesman who was the founding father of the Republic of Turkey, serving as its first President of Turkey, president from 1923 until Death an ...

's (founding president of

Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...

) 100th birthday. *

1996 Summer Olympics The 1996 Summer Olympics (officially the Games of the XXVI Olympiad, also known as Atlanta 1996 and commonly referred to as the Centennial Olympic Games) were an international multi-sport event held from July 19 to August 4, 1996, in Atlanta, ...

, 100th anniversary of the 1st Summer Olympics in 1896. *

Philippine Centennial The Philippine Centennial was a series of celebrations by the Philippine government to primarily commemorate the 100th anniversary of the proclamation of Philippine Independence on June 12, 1898. Background The Philippine Centennial primarily c ...

, 100th anniversary of the proclamation of Philippine Independence. * 100th Anniversary of Samastha Kerala *100th Anniversary of

Universal Pictures Universal City Studios LLC, doing business as Universal Pictures (also known as Universal Studios or simply Universal), is an American filmmaking, film production and film distribution, distribution company headquartered at the 10 Universal Ci ...

and

Paramount Pictures Paramount Pictures Corporation, commonly known as Paramount Pictures or simply Paramount, is an American film production company, production and Distribution (marketing), distribution company and the flagship namesake subsidiary of Paramount ...

* First World War centenary, 2014–2018, began with the centenary of the outbreak of World War I and ended with the Armistice Day centenary. * 100th Anniversary of

Fox Film The Fox Film Corporation (also known as Fox Studios) was an American independent company that produced motion pictures and was formed in 1914 by the theater "chain" pioneer William Fox. It was the corporate successor to his earlier Greater Ne ...

(now

20th Century Studios 20th Century Studios, Inc., formerly 20th Century Fox, is an American film studio, film production and Film distributor, distribution company owned by the Walt Disney Studios (division), Walt Disney Studios, the film studios division of the ...

) * 100th Anniversary of the Xinhai Revolution and Republic of China * 100th Anniversary of the Independence of Albania * 100th Anniversary of

United Artists United Artists (UA) is an American film production and film distribution, distribution company owned by Amazon MGM Studios. In its original operating period, it was founded in February 1919 by Charlie Chaplin, D. W. Griffith, Mary Pickford an ...

* 100th Anniversary of the Independence of Finland * 100th Anniversary of the Chinese Communist Party (CPC) *100th Anniversary of the Independence of Bulgaria *100th Anniversary of the foundation of the

Bulgarian Football Union The Bulgarian Football Union ( BFS) is the governing body of association football in Bulgaria, and a member of UEFA since 1954. It organizes a football league, Bulgarian Parva Liga, and fields its Bulgaria national football team in UEFA and F ...

*100th Anniversary of the foundation of the

Bulgarian Academy of Sciences The Bulgarian Academy of Sciences (abbreviated BAS; , ''Bŭlgarska akademiya na naukite'', abbreviated БАН) is the National Academy of Bulgaria, established in 1869. The Academy, with headquarters in Sofia, is autonomous and consists of a S ...

*100th Anniversary of the foundation of

Sofia University Sofia University "St. Kliment Ohridski" () is a public university, public research university in Sofia, Bulgaria. It is the oldest institution of higher education in Bulgaria. Founded on 1 October 1888, the edifice of the university was constr ...

*100th Anniversary of the foundation of

Bulgarian State Railways The Bulgarian State Railways (, abbreviated as БДЖ, BDZ or BDŽ) are Bulgaria's state railway company and former largest railway carrier in the country, established as an entity in 1888. The company's headquarters are located in the capital So ...

*100th Anniversary of

Warner Bros. Warner Bros. Entertainment Inc. (WBEI), commonly known as Warner Bros. (WB), is an American filmed entertainment studio headquartered at the Warner Bros. Studios complex in Burbank, California and the main namesake subsidiary of Warner Bro ...

and Walt Disney Studios. * 100th Anniversary of the Republic of Turkey *100th Anniversary of the Flying Scotsman *100th Anniversary of

Columbia Pictures Columbia Pictures Industries, Inc., Trade name, doing business as Columbia Pictures, is an American film Production company, production and Film distributor, distribution company that is the flagship unit of the Sony Pictures Motion Picture Group ...

and

Metro-Goldwyn-Mayer Metro-Goldwyn-Mayer Studios Inc. (also known as Metro-Goldwyn-Mayer Pictures, commonly shortened to MGM or MGM Studios) is an American Film production, film and television production and film distribution, distribution company headquartered ...

. *

2024 Summer Olympics The 2024 Summer Olympics (), officially the Games of the XXXIII Olympiad () and branded as Paris 2024, were an international multi-sport event held in France from 26 July to 11 August 2024, with several events started from 24 July. P ...

, 100th anniversary of the

1924 Summer Olympics The 1924 Summer Olympics (), officially the Games of the VIII Olympiad () and officially branded as Paris 1924, were an international multi-sport event held in Paris, France. The opening ceremony was held on 5 July, but some competitions had al ...