FYI, Decades (or Centuries) Don't Start on Year "Zero".

[Twisted]

Starting the new year out with a topic.

 

[Ransom]

Starting the new year out with a topic.

That's dear, nice.

 

[Baptist City Holdout]

I agree. The first decade ran from the year 1 to 10.
Then the second from 11 to 20 and so forth and so on.
We may have completed the teens but not the decade!

 

[Twisted]

Starting the new year out with a topic.

That's dear, nice.

At first glance, I read this, "Thanks dear, nice".

I thought, "Tarheel will be jealous!"

 

[Darkwing Duck]

There's no year 0. So either the last decade of BCE had 9 years or the first decade CE had 9 years. Since it sounds silly to say that 1930 is part of the twenties, not the thirties, society seems to have collectively decided that decades will start with the common sense year.

 

[Ransom]

There's no year 0. So either the last decade of BCE had 9 years or the first decade CE had 9 years.

The last decade of the 20th century: 1991-2000.
The "Nineties": 1990-1999.

This isn't difficult. We count years using more than one frame of reference.

 

[Walt]

There's no year 0. So either the last decade of BCE had 9 years or the first decade CE had 9 years. Since it sounds silly to say that 1930 is part of the twenties, not the thirties, society seems to have collectively decided that decades will start with the common sense year.

The 30s ran from 1930-1939, but the new decade started in 1931. We are in the 20s now, but technically, the new decade is next year.