decade

Also known as ten years, 10 years, years decade, decennium, calendar decade

A decade (from , , ) is a period of 10 years. It may also be called a decennium (from , ). Decades may describe any ten-year period, such as those of a person's life, or refer to specific groupings of calendar years.

AI overview

A decade is a period of 10 years, and it can refer to any span of ten years—whether it's ten years in someone's life or a specific grouping of calendar years. Understanding decades helps us organize and discuss time in meaningful chunks, making it easier to track historical periods, personal milestones, and cultural changes.

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Wikidata facts

Duration: 1
Image: 2000s decade montage3.png

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Commons category: Decades
Wikidata time precision: 8
exact match: www.w3.org/TR/owl-time/#time:unitDecade
P8168: Crowsnest Pass

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Contents

Usage
0-to-9 decade
1-to-0 decade
Public usage of the two methods
See also
References
Notes
External links

== Usage == Any period of ten years is a 'decade' or 'decennium'. For example, the statement that "during his last decade, Mozart explored chromatic harmony to a degree rare at the time" refers to the last 10 years of Wolfgang Amadeus Mozart's life without regard to which calendar years are encompassed. Also, 'the first decade' of a person's life begins on the day of their birth and ends at the end of their 10th year of life when they have their 10th birthday; the second decade of life starts with their 11th year of life (during which one is typically still referred to as being "10") and ends at the end of their 20th year of life, on their 20th birthday; similarly, the third decade of life, when one is in one's twenties or 20s, starts with the 21st year of life, and so on, with subsequent decades of life similarly described by referencing the tens digit of one's age.