The world was at war during these years ( W W I).
That is the year Christopher Columbus discovered America.
It defines years when something of significance happened.
It's when World War I occurred.
(2,000 years) times (1,000 years) = 2 million square yearsThat quantity has no physical significance.
To make memories of your teen years.
coincidence
last day of the month, 3 years in every 4
Abbotts Hall Farm was built approximately 300 years ago. The significance of the coastline near it is that it is the largest estuary in Eastern Anglia.
The Republicans gained control for the first time in eighteen years.
People feel it is a time to start over, to make a new them. (resolutions)
prevented another widespread European war for nearly a hundred years