| 2009-10 Key Dates |
| 2009-10 | Event |
| Jan. 5 | 10-day contracts may now be signed |
| Jan. 10 | All contracts are guaranteed for the remainder of the season |
| Feb. 12-15 | 2010 NBA All-Star Weekend |
| Feb. 18 | Trade deadline (3 p.m. ET) |
| Feb. 21-28 | NBA Heritage Week 2009-10 |
| April 7-10 | Portsmouth Invitational Tournament (Portsmouth, Va.) |
| April 14 | Regular Season ends |
| April 15 | Rosters set for 2010 NBA Playoffs (3 p.m. ET) |
| April 17 | 2010 NBA Playoffs begin |
| April 25 | NBA Early Entry Eligibility Deadline (11:59 p.m. ET) |
| May 3 | Conference Semifinals begin (possible move up to May 1 or 2) |
| May 18 | Conference Finals begin (possible move up to May 16 or 17) |
| May 18 | 2010 NBA Draft Lottery |
| June 3 | 2010 NBA Finals begin (possible move up to June 1) |
| June 14 | NBA Draft Early Entry Entrant Withdrawal Deadline (5:00 p.m. ET) |
| June 17 | The Finals latest possible date |
| June 24 | 2010 NBA Draft |
