> Guess the "decades run from 1 to 10, not 0 to 9" people won that argument. Like: the twenties run from 2021 to 2030, not from 2020 to 2029. Because the year

> Guess the "decades run from 1 to 10, not 0 to 9" people won that argument. Like: the twenties run from 2021 to 2030, not from 2020 to 2029. Because the year after 1 BC is 1 AD. There is no year zero. This is one of the weird things of our calendar. More about that see Wikipedia: https://en.wikipedia.org/wiki/Year_zero https://en.wikipedia.org/wiki/Year_zero. So, the first millennium is from 1 to 1000, the second from 1001 to 2000 and the third from 2001 to 3000. And the twenties being the third decade start with the year 2021, and so on. The comment is just snarky, because people have a mess with dates. Usually people start counting with one, even if mathematically starting with zero would make more sense. But hey, they make an exception for millennia, centuries and decades. They start with zero. Bravo! In a sense this is funny. People don't usually start counting with zero. Of all things they do this for decades, however for once this is not ... applicable? useful? right?