1 million years
To celebrate the new Millennium in 2000
One millennium is one thousand years (1,000 years).
One generation is 25 years.
One Thousand years.
20 years
1.44
One generation is twenty years.
One generation is twenty years.
About 1.9 years.
A century is 100 years.
4 years
There are about 0.000114077 years in one hour.