CREATE TABLE table_11213 ("Week" TEXT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Kickoff [a ]" TEXT, "Game site" TEXT, "Attendance" TEXT, "Record" TEXT)

When was the date that week 9 started?
SELECT "Date" FROM table_11213 WHERE "Week" = '9'
SELECT "Date" FROM "table_11213" WHERE "Week" = '9'