CREATE TABLE table_13653 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

Who were the Opponents on December 18, 2005?
SELECT "Opponent" FROM table_13653 WHERE "Date" = 'december 18, 2005'
SELECT "Opponent" FROM "table_13653" WHERE "Date" = 'december 18, 2005'