Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Game | Date | Opponent | Score | Location/Attendance | Record |
| --- | --- | --- | --- | --- | --- |
| 72.0 | March 2 | Milwaukee | 112-108 | Alexander Memorial Coliseum | 43-29 |
| 73.0 | March 6 | Philadelphia | 139-99 | Alexander Memorial Coliseum | 44-29 |
| 74.0 | March 9 | Cincinnati | 134-107 | Alexander Memorial Coliseum | 45-29 |
| 75.0 | March 11 | Chicago | 90-102 | Chicago Stadium | 45-30 |
| 76.0 | March 12 | Chicago | 109-90 | Alexander Memorial Coliseum | 46-30 |
| 77.0 | March 15 | Philadelphia | 120-122 | The Spectrum | 46-31 |
| 78.0 | March 16 | Seattle | 131-127 (OT) | Alexander Memorial Coliseum | 47-31 |
| 79.0 | March 18 | San Francisco | 128-115 | Oakland-Alameda County Coliseum Arena | 48-31 |
| 80.0 | March 20 | San Diego | 97-115 | San Diego Sports Arena | 48-32 |
| 81.0 | March 21 | L.A. Lakers | 103-116 | The Forum | 48-33 |
| 82.0 | March 23 | San Diego | 121-128 | San Diego Sports Arena | 48-34 |
Question:
What was the date of the game when the record was 46-31?
Answer:
March 15