The answer will depend on which country or region the question is about.
triennium
The largest in magnitude is a triennium, which is 3000 years. The order, from smallest to largest is:Quarter - 3 monthsAnnum - 1 yearDecade - 10 yearsCentury - 100 yearsMillenium - 1000 yearsTriennium - 3000 years
10 years is called a decade hence it is only a decade not decade of years
one decade is 10 years, one decade is 3650 days
A decade is 10 years. Since there are 12 months in a year, a decade will have 120 months.
1890-1900
1890-1900
India
In the last decade there was terror in the west. The 1940s DECADE experienced World War, V-J Day and the start of the Cold War.
No largest one; each runs exactly ten years.
1850
No largest one; each runs exactly ten years.
Nightly Business Report - 1981 Careers for the Next Decade was released on: USA: 26 November 2009
1760's
triennium
Last decade
Year, Decade, Century, Millennium