>>82221669
Yes, because there is no 0 AD. Literally just scroll back in any calendar, even the one on your phone, and 1 AD will be directly preceded by 1 BC.
The 80s is not a decade that conforms to the Gregorian calendar. I have told you this a dozen times. Its an entirely arbitrary grouping of 10 years, in the same way 1983-1993 is. Neither are decades which conform to the Gregorian calendar. 1981-1990 is. The 190th decade of it, in fact.
Idiot.