The 1st century started at 1 A.D. and included 100. 2nd century started 101 to 200. Etc etc. If you change the 21st century to be 2000. You would to shift everything down. Eventually making the 1st century 99 years. Or creating a year 0 or using 1BC.
Correct.
The 1st century started at 1 A.D. and included 100. 2nd century started 101 to 200. Etc etc. If you change the 21st century to be 2000. You would to shift everything down. Eventually making the 1st century 99 years. Or creating a year 0 or using 1BC.
This is why the years in the “20th Century” started with “19”. 20 is the end, not the start.
I thought it was the 20th century because if you count centuries starting at 1-99 CE, 1900-1999 is the twentieth one
One to 99 is not a century. :)