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A century is a period of 100 years. 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. A centennial or centenary is a hundredth anniversary, or a celebration of this, typically the remembrance of an event which took place a hundred years earlier.


Start and end of centuries

Although a century can mean any arbitrary period of 100 years, there are two viewpoints on the nature of standard centuries. One is based on strict construction, while the other is based on popular perception. According to the strict construction, the 1st century AD began with AD 1 and ended with AD 100, the 2nd century spanning the years 101 to 200, with the same pattern continuing onward. In this model, the ''n''-th century starts with the year that ends with "01", and ends with the year that ends with "00"; for example, the 20th century comprises the years 1901 to 2000 in strict usage. In popular perception and practice, centuries are structured by grouping years based on sharing the 'hundreds' digit(s). In this model, the ''n''-th century starts with the year that ends in "00" and ends with the year ending in "99"; for example, the years 1900 to 1999, in popular culture, constitute the 20th century. (This is similar to the grouping of "0-to-9 decades" which share the 'tens' digit.) To facilitate calendrical calculations by computer, the astronomical year numbering and ISO 8601 systems both contain a year zero, with the astronomical year 0 corresponding to the year 1 BCE, the astronomical year -1 corresponding to 2 BCE, and so on.


Alternative naming systems

Informally, years may be referred to in groups based on the hundreds part of the year. In this system, the years 1900–1999 are referred to as the ''nineteen hundreds'' (''1900s''). Aside from English usage, this system is used in
Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...
,
Danish Danish may refer to: * Something of, from, or related to the country of Denmark People * A national or citizen of Denmark, also called a "Dane," see Demographics of Denmark * Culture of Denmark * Danish people or Danes, people with a Danish ance ...
, Norwegian, Icelandic, Finnish and Hungarian. The Swedish ''nittonhundratalet'' (or ''1900-talet''), Danish ''nittenhundredetallet'' (or ''1900-tallet''), Norwegian ''nittenhundretallet'' (or '' 1900-tallet''), Finnish ''tuhatyhdeksänsataaluku'' (or ''1900-luku'') and Hungarian ''ezerkilencszázas évek'' (or ''1900-as évek'') refer unambiguously to the years 1900–1999. Italian also has a similar system, but it only expresses the hundreds and omits the word for “thousand”. This system mainly functions from the 11th to the 20th century: :''il Quattrocento'' (that is “the four hundred”, the 15th century) :''il
Cinquecento The cultural and artistic events of Italy during the period 1500 to 1599 are collectively referred to as the Cinquecento (, ), from the Italian for the number 500, in turn from , which is Italian for the year 1500. Cinquecento encompasses the s ...
'' (that is “the five hundred”, the 16th century). These terms are often used in other languages when referring to the
history of Italy The history of Italy covers the ancient period, the Middle Ages, and the modern era. Since classical antiquity, ancient Etruscan civilization, Etruscans, various Italic peoples (such as the Latins, Samnites, and Umbri), Celts, ''Magna Graecia'' ...
.


Similar dating units in other calendar systems

While the century has been commonly used in the West, other cultures and calendars have utilized differently sized groups of years in a similar manner. The
Hindu calendar The Hindu calendar, Panchanga () or Panjika is one of various lunisolar calendars that are traditionally used in the Indian subcontinent and Southeast Asia, with further regional variations for social and Hindu religious purposes. They adopt a s ...
, in particular, summarizes its years into groups of 60, while the Aztec calendar considers groups of 52.


See also

* Age of Discovery * Ancient history * Before Christ * Common Era * Decade *
List of decades, centuries, and millennia This is a list of decades, centuries, and millennia from 10,000 BC to 2030 AD, including links to corresponding articles with more information about them. Notes See also * List of years * Timelines of world history * List of timelines * Chron ...
* Lustrum * Middle Ages * Millennium *
Modern era The term modern period or modern era (sometimes also called modern history or modern times) is the period of history that succeeds the Middle Ages (which ended approximately 1500 AD). This terminology is a historical periodization that is applie ...
* Saeculum * Year


Notes


References


Bibliography

* tp://ftp.loc.gov/pub/reference.guides/battle.centuries.txt ''The Battle of the Centuries''
Ruth Freitag Ruth (or its variants) may refer to: Places France * Château de Ruthie, castle in the commune of Aussurucq in the Pyrénées-Atlantiques département of France Switzerland * Ruth, a hamlet in Cologny United States * Ruth, Alabama * Ruth, Arka ...
,
U.S. Government Printing Office The United States Government Publishing Office (USGPO or GPO; formerly the United States Government Printing Office) is an agency of the legislative branch of the United States Federal government. The office produces and distributes information ...
. Available from the Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250- 7954. Cite stock no. 030-001-00153-9. Retrieved 3 March 2019. {{Time measurement and standards 100 (number) Units of time