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:
| Week | Date | Opponent | Result | Game site | Record | Attendance |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | September 3, 1984 | Cleveland Browns | W 33-0 | Kingdome | 1–0 | 59540.0 |
| 2.0 | September 9, 1984 | San Diego Chargers | W 31-17 | Kingdome | 2–0 | 61314.0 |
| 3.0 | September 16, 1984 | at New England Patriots | L 23-38 | Sullivan Stadium | 2–1 | 43140.0 |
| 4.0 | September 23, 1984 | Chicago Bears | W 38-9 | Kingdome | 3–1 | 61520.0 |
| 5.0 | September 30, 1984 | at Minnesota Vikings | W 20–12 | Hubert H. Humphrey Metrodome | 4–1 | 57171.0 |
| 6.0 | October 7, 1984 | at Los Angeles Raiders | L 14-28 | Los Angeles Memorial Coliseum | 4–2 | 77904.0 |
| 7.0 | October 14, 1984 | Buffalo Bills | W 31-28 | Kingdome | 5–2 | 59034.0 |
| 8.0 | October 21, 1984 | at Green Bay Packers | W 30-24 | Lambeau Field | 6–2 | 52286.0 |
| 9.0 | October 29, 1984 | at San Diego Chargers | W 24-0 | Jack Murphy Stadium | 7–2 | 53974.0 |
| 10.0 | November 4, 1984 | Kansas City Chiefs | W 45-0 | Kingdome | 8–2 | 61396.0 |
| 11.0 | November 12, 1984 | Los Angeles Raiders | W 17-14 | Kingdome | 9–2 | 64001.0 |
| 12.0 | November 18, 1984 | at Cincinnati Bengals | W 26-6 | Riverfront Stadium | 10–2 | 50280.0 |
| 13.0 | November 25, 1984 | at Denver Broncos | W 27-24 | Mile High Stadium | 11–2 | 74922.0 |
| 14.0 | December 2, 1984 | Detroit Lions | W 38-17 | Kingdome | 12–2 | 62441.0 |
| 15.0 | December 9, 1984 | at Kansas City Chiefs | L 7-34 | Arrowhead Stadium | 12–3 | 34855.0 |
Question:
On what date was the game against San Diego Chargers played?
Answer:
September 9, 1984