A decade (pronounce: DEK-aid) is a period of 10 years. The word comes from the Ancient Greek word for ten: "deka". 10 decades make a century, while 100 decades make a millennium. A decade is any 10 year period: There are different ways to refer to different groupings of ten years. For example, the period from 2001 to 2010 can be described as the 1st decade of the 21st century. An individual who has been alive two full decades is referred to as being in their 20s for the next decade of their life, from age 20 to 29. Decades are also considered specific groups of ten years sharing the same tens digit, identified by name, as in the nineteen-eighties (1980s) referring to the period from 1980 to 1989 and the nineteen-nineties (1990s) referring to the period from 1990 to 1999. This is the sense meant when someone refers to decades without other context, for example saying 'next decade' in any year between 2020 and 2029 would indicate the 2030s. Sometimes this is shortened to just the decade, where the context is clear, as in the eighties (80s) or the nineties (90s). No apostrophe is used before the s in the names of these decades.
Some decades also have nicknames, such as the Roaring Twenties (1920s), the Gay Nineties (1890s) (US), the Naughty Nineties (1890s) (UK), and the Swinging Sixties (1960s).
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|11th century BC||1090s BC||1080s BC||1070s BC||1060s BC||1050s BC||1040s BC||1030s BC||1020s BC||1010s BC||1000s BC|
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|8th century BC||790s BC||780s BC||770s BC||760s BC||750s BC||740s BC||730s BC||720s BC||710s BC||700s BC|
|7th century BC||690s BC||680s BC||670s BC||660s BC||650s BC||640s BC||630s BC||620s BC||610s BC||600s BC|
|6th century BC||590s BC||580s BC||570s BC||560s BC||550s BC||540s BC||530s BC||520s BC||510s BC||500s BC|
|5th century BC||490s BC||480s BC||470s BC||460s BC||450s BC||440s BC||430s BC||420s BC||410s BC||400s BC|
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|3rd century BC||290s BC||280s BC||270s BC||260s BC||250s BC||240s BC||230s BC||220s BC||210s BC||200s BC|
|2nd century BC||190s BC||180s BC||170s BC||160s BC||150s BC||140s BC||130s BC||120s BC||110s BC||100s BC|
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Decade Facts for Kids. Kiddle Encyclopedia.