When was Shaquille O'Neal traded to the Celtics?

Shaquille O'Neal was traded to the Boston Celtics on June 24, 2010. He signed with the team after being acquired from the Cleveland Cavaliers, where he had played the previous season. O'Neal's time with the Celtics lasted for one season, during which he contributed to the team's efforts in the 2010-2011 NBA season.