[SkyDancer]

The new decade begins at 2021; 2020 is the end of this decade.

[eartick]

so you say

[southern rock]

The new decade begins at 2021; 2020 is the end of this decade.

Everything starts with zero, not 1. I understand that they made a mistake in the first century and made year one the first year AD. But all that really means is that the first century only had 99 years. A 2000-year-old mistake doesn’t mean that we can start counting from the number 1.

[HamiltonJay]

It depends on if you user ZERO based numbering or not...

As any computer programmer can tell you, zero based numbering you have ten when you process the index of 9.

1 based, you haven’t hit 10, until you get to 10.