CREATE TABLE table_40260 ("Season" FLOAT, "Date" TEXT, "Venue" TEXT, "City" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Attendance" FLOAT)

On what Date was the Venue at Exhibition Stadium?
SELECT "Date" FROM table_40260 WHERE "Venue" = 'exhibition stadium'
SELECT "Date" FROM "table_40260" WHERE "Venue" = 'exhibition stadium'