CREATE TABLE table_203_490 (id DECIMAL, "date" TEXT, "opponent#" TEXT, "rank#" TEXT, "site" TEXT, "result" TEXT, "attendance" DECIMAL)

the game on what date had the most attendance ?
SELECT "date" FROM table_203_490 ORDER BY "attendance" DESC LIMIT 1
SELECT "date" FROM "table_203_490" ORDER BY "attendance" DESC NULLS LAST LIMIT 1