Decade

A decade is a period of 10 years. The word is derived (via French and Latin) from the Ancient Greek: δεκάς, translit. dekas), which means a group of ten. Other words for spans of years also come from Latin: biennium (2 years), triennium (3 years), quadrennium (4 years), lustrum (5 years), century (100 years), millennium (1000 years).

Distinctions

Although any period of ten years is a decade,[1][2] a convenient and frequently referenced interval is based on the tens digit of a calendar year, as in using "1960s" to represent the decade from 1960 to 1969.[3][4] Often, for brevity, only the tens part is mentioned (60s or sixties), although this may leave it uncertain which century is meant. These references are frequently used to encapsulate popular culture or other widespread phenomena that dominated such a decade, as in The Great Depression of the 1930s or "The Roaring Twenties".

However, the Gregorian calendar begins with the year 1. (There is no year "zero", and the year before AD 1 is 1 BC with nothing in between.) Therefore, its first decade is from AD 1 to AD 10, the second decade from AD 11 to AD 20, and so on.[5] So, although "the 1960s" comprises the years 1960 to 1969, "the 197th decade" spans 1961 to 1970.

A decade may also refer to an arbitrary span of ten years. For example, the statement "during his last decade, Mozart explored chromatic harmony to a degree rare at the time", merely refers to the last ten years of Mozart's life without regard to which calendar years are encompassed.

Particularly for the 20th century, a nominal decade is often used to refer not just to a set of ten years but rather to a period roughly approximating those ten years - for example, the phrase the sixties often refers to events that took place between c. 1964 and 1972, and to memories of the counterculture, flower power, protests of 1968 and other things happening at the time. Often, such a nominal decade will come to be known by a title, such as the "Swinging Sixties" (1960s), the "Warring Forties" (1940s) and the "Roaring Twenties" (1920s). This practice is occasionally also used for decades of earlier centuries, for example references to the 1890s as the "Gay Nineties" or "Naughty Nineties".

Other Languages
Afrikaans: Dekade
Alemannisch: Jahrzehnt
العربية: عقد (وقت)
aragonés: Decenio
asturianu: Década
Avañe'ẽ: Parehegua
авар: АнцІсон
Bân-lâm-gú: Cha̍p-nî-kí
Basa Banyumasan: Dasawarsa
беларуская: Дзесяцігоддзе
беларуская (тарашкевіца)‎: Дзесяцігодзьдзе
български: Десетилетие
bosanski: Decenija
català: Dècada
čeština: Dekáda
chiShona: Mwaka wechikumi
dansk: Årti
Deutsch: Jahrzehnt
Ελληνικά: Δεκαετία
español: Década
Esperanto: Jardekoj
euskara: Hamarkada
فارسی: دهه
føroyskt: Áratíggju
français: Décennie
Frysk: Desennium
Gaeilge: Deichniúr
Gàidhlig: Deichead
galego: Década
ગુજરાતી: દાયકો
한국어: 연대 (연도)
हिन्दी: दशक
hornjoserbsce: Lětdźesatk
hrvatski: Desetljeće
Ido: Yardeko
Bahasa Indonesia: Dasawarsa
interlingua: Decennio
íslenska: Áratugur
italiano: Decennio
עברית: עשור
Basa Jawa: Dasawarsa
ქართული: ათწლეული
қазақша: Онжылдық
Kiswahili: Mwongo
Kreyòl ayisyen: Deseni
Latina: Decennium
latviešu: Desmitgade
lietuvių: Dešimtmetis
la .lojban.: dekna'a
magyar: Évtized
македонски: Деценија
Malagasy: Taompolo
Māori: Tekau tau
मराठी: दशक
მარგალური: ვითწანურა
Bahasa Melayu: Dekad
Mìng-dĕ̤ng-ngṳ̄: Nièng-dâi
Nāhuatl: Mahtlacxihuitl
Nederlands: Decennium
Nedersaksies: Decennia
日本語: 十年紀
norsk: Tiår
norsk nynorsk: Tiår
occitan: Decenni
oʻzbekcha/ўзбекча: Oʻn yillik
پښتو: لسيزه
português: Década
română: Deceniu
Runa Simi: Chunkawata
русиньскый: Десятьроча
русский: Десятилетие
саха тыла: Уон сыл
Scots: Decade
Sesotho sa Leboa: Ngwagasome
shqip: Dekada
Simple English: Decade
slovenčina: Desaťročie
slovenščina: Desetletje
ślůnski: Dekada
српски / srpski: Деценија
srpskohrvatski / српскохрватски: Decenija
Basa Sunda: Daptar dékade
svenska: Decennium
татарча/tatarça: Унъеллык
Türkçe: Onyıl
українська: Десятиліття
اردو: عشرہ
Vahcuengh: Nienzdaih
Tiếng Việt: Thập niên
Winaray: Dekada
吴语: 年代
粵語: 年代
中文: 年代
Kabɩyɛ: Pɩnzɩ hiu