Editing Decade (section)

=== 0-to-9 decade ===
The most widely used method for denominating decades is to group years based on their shared tens digit, from a year ending in a 0 to a year ending in a 9{{snd}} for example, the period from 1960 to 1969 is the 1960s, and the period from 1970 to 1979 is the 1970s. Sometimes, only the tens part is mentioned (''{{`}}60s'' or ''sixties'', and ''{{`}}70s'' or ''seventies''), although this may leave it ambiguous as to which [[century]] is meant. However, this method of grouping decades cannot be applied to the decade immediately preceding AD{{nbs}}10, because there was no year 0.

Referring to ten-year periods as decades in this way only became common in the late 19th century.<ref>{{cite web|url=https://learningenglish.voanews.com/a/a-23-2010-01-20-voa1-84659222/117631.html|title=Now We're Past the, Uh, First Decade, What Do We Call the Next One|publisher=Learning English|language=English|date=20 January 2010|accessdate=2 January 2022}}</ref> Particularly in the 20th century, ''0-to-9'' decades came to be referred to with associated nicknames, such as the "[[Roaring Twenties]]" ([[1920s]]), the "Warring Forties" ([[1940s]]), and the "[[Swinging Sixties]]" ([[1960s]]). This practice is occasionally also applied to decades of earlier centuries; for example, referencing the [[1890s]] as the "[[Gay Nineties]]" or "Naughty Nineties".