The last day of the decade - not

Today is the last day of the decade: December 31, 2019. But it's not. the twenty-teens don't end until the end of 2020.

Count things out yourself on your fingers. The tenth year ends a decant: there is no number zero. It's like when we turned over the millennium. The year 2000 ended the 1900s rather than beginning the 2000s. The year 2001 actually began the new millennium.

So sorry folks, the new roaring twenties don't actually start tomorrow. It's like when I turn 60 in April 2020 I will still in fact be in my fifties. Hey, you grab onto whatever branch you can.