Why Are We in the 21st Century and Not the 20th Century? Explained
Understand why the 21st century started in 2001, not 2000, based on how centuries are counted from year 1 AD onward.
Why Is the 21st Century Considered to Start in 2001 Instead of 2000?
Discover why the 21st century officially begins in 2001 and not 2000, based on how centuries are counted.