How come we are in the 21st century if we are in the 2000s and not 2100s?

Question

How come we are in the 21st century if we are in the 2000s and not 2100s?

In: Other

Answer 1

The first century CE would have been from 000-099 CE. So 0100-0199 CE would have been the second century and 1000-1099 the eleventh.

Edit: made a whoopsie