Yes, Alex Jones is right that the next decade begins in 2021 according to the Gregorian Calendar. I wrote an article about this. Click here to see more.
But astrological and computer time reassigns 1 BC as 0 AD in order to align each decade, century, and millennia, to end at the end of a nine year (9) like 2019 for example. The Holocene Calendar adds 10K to each year which then turns 2019 AD into 12019. I would favor for whatever calendar that allows for alignment to 0. Either backdate-add an actual year zero to a calendar system or go with the astrological system of having 1 BC as 0 AD. That is what I would prefer. Alex Jones is right but I still think starting at 1 messes things up.