CREATE TABLE table_203_673 (id DECIMAL, "#" DECIMAL, "date" TEXT, "opponent" TEXT, "score" TEXT, "win" TEXT, "loss" TEXT, "save" TEXT, "attendance" DECIMAL, "record" TEXT)

which date had the most attendance ?
SELECT "date" FROM table_203_673 ORDER BY "attendance" DESC LIMIT 1
SELECT "date" FROM "table_203_673" ORDER BY "attendance" DESC NULLS LAST LIMIT 1