The real question is: Why do you want the “noughties” to be over? LOL!!
So.... you’re telling us it’s a new decade in the populist sense... *sigh*
It’s a new decade in a cardinal sense of counting, in the ordinary vernacular of everyday life, we can’t call something the “twenties” yet priggishly insist they do not start until 2021. Of course they start in 2020...the nature of that colloquial decade-naming device is to refer to the last two digits as a shorthand.
The noughties (oughties?) are ending tonight and the...what? teenies?...are starting, tonight.
But technically, the “second decade of the twenty-first century”—a different creature altogether—starts next year at this time.