On this day: Celtics set record for biggest single-season turnaround

On this day, the Boston Celtics set the record for the greatest single-season turnaround in NBA history.

On this day in Boston Celtics history, the NBA would cancel a game between the Boston Celtics and the Indiana Pacers a day after the Boston Marathon terrorist attacks that occurred in 2013. The move was made out of respect for the victims of the bombing after an initial postponement, and the game was ultimately not rescheduled.

The cancellations did not impact the postseason, as seeds that could have otherwise have been impacted were already locked into their position, marking the most recent season the NBA has had an odd number of regular-season games as a result, with 1,229 games played.

An NHL game between the Boston Bruins and Ottawa Senators was also canceled on the day of the Marathon bombings which was also to be held at TD Garden.