[huseyinkeles]

It is 20s, but not a new decade :)

See https://en.wikipedia.org/wiki/Decade

[Mountain_Skies]

You all are correct but no one cares. Numbers ending with 0 is what gets attention. Going back to the year 1 doesn't add much anyway since we are pretty sure that the count of years since the birth of Jesus (whoever he was historically) is off.

[ShamelessC]

https://m.xkcd.com/2249/

[rejschaap]

> A decade is a period of 10 years.

Technically, every year is the end of a decade.