CREATE TABLE table_10942 ("Date" TEXT, "Track" TEXT, "Race" TEXT, "Distance" TEXT, "Purse  (  US$  ) " TEXT, "Surface track" TEXT, "Winning horse" TEXT, "Winning jockey" TEXT)

What Date is Northern Spur Breeders' Cup Stakes Race?
SELECT "Date" FROM table_10942 WHERE "Race" = 'northern spur breeders'' cup stakes'
SELECT "Date" FROM "table_10942" WHERE "Race" = 'northern spur breeders\' cup stakes'