Actually most HD worlds rolled over a period of time (they each switched over starting with one server when each of the worlds rolled over after their NCG was played). In most cases, I think what people would have to do is to look at their National Champions page and see what is the last season listed (funny how I assume that is the last season of HD 2.0 due to a simple feature we would like to see updated).
Ex. Phelan lists season 97 as the last full season under HD 2.0 (I assume this is correct). But if I remember correctly I did the start of season #98 under HD 2.0 and after that season got underway, it was then under HD 3.0 (so season 98 started with HD 2.0 recruiting, then had mid-season recruiting under HD 3.0)
Also since each world is either a 1-game or 2-game worlds, each has a different # of seasons played under HD 3.0 (so yes, for example, one world might of played 7 seasons of HD 3.0 while another would of played 12 seasons).
11/22/2017 5:23 PM (edited)