[paterfamilias]

BTW, Greta, the New Decade actually starts on January 1, 2021.

Go back to school.

[ridesthemiles]

he New Decade actually starts on January 1, 2021.”””

NO- Mathematically, that date is the end of the FIRST year of the decade. 1-2-3-4-5-6-.....

2020 thru 2029 is the decade.

2000 thru 2009 was the first decade of this century.