The Chinese, base on Taoist teaching is called a`lifetime`. The reason being, after the full cycle of the 12th animals in the Chinese lunar calender. The recycle period, from 61st will be call the new begining. They will celebrate by their family and relative with a big feast. That is call `coming of age` among their belief.
A period of 60 years is called a sexagenary cycle.
A period of forty years is called a quadragennial.
A period of thirty years is called a "trio-decade" or simply a "thirty-year period."
You may be thinking of a "score", as in Lincoln's Gettysburg Address ('Four score and seven years ago' means 87 years ago.)It is also called two decades.
The word sesquidecade means 'a period of one and a half decades.' i.e. 15 years.Note: Although the word is in use, we have yet to find it listed in any English dictionary.
The correct spelling is "triennium." It refers to a period of three years.
It is 6 decades = 60 years
A Period of ten years is called a decade.
A period of 75 years is called a "septuagenary."
60 years is called a diamond jubilee.
A period of 10 years is called a decade.
A period of 100 years is called a century.
A period of 100 years is called a century.
over 60 years
A period of ten years is a decade.
The period of 100 years is called a century. A period of 10 years is a decade, and 1000 years is a millennium.
A period of forty years is called a quadragennial.
Assuming a period of 13 years has four leap years, then the number of seconds in thirteen years is equal to (60 x 60 x 24 x 365 x 9) + (60 x 60 x 24 x 366 x 4) = 410313600 seconds. If a period of 13 years has three leap years, then the number of seconds in thirteen years is equal to (60 x 60 x 24 x 365 x 10) + (60 x 60 x 24 x 366 x 3) = 410227200 seconds.