CREATE TABLE table_20736 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT, "Time" TEXT)

On what dates where games played at Football Park?
SELECT "Date" FROM table_20736 WHERE "Ground" = 'Football Park'
SELECT "Date" FROM "table_20736" WHERE "Ground" = 'Football Park'