At this point, however, nothing has been agreed to. For the league to start the season on Dec. 1, it would need to be signed off on by the NBPA, which hasn’t happened yet, sources said. Both sides remain focused on the myriad issues left to be resolved before the league can begin play at Walt Disney World next month. The idea of shifting the NBA calendar from its current, long-standing schedule of beginning the regular season in October and ending its playoffs in June to going from December until August — and, by extension, avoiding conflicting with the NFL as much as possible — has been something that Hawks CEO Steve Koonin has publicly pushed for, including on a panel at February’s Sloan Analytics Conference that was moderated by ESPN’s Kevin Arnovitz.