CREATE TABLE table_57968 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What day does the home side score 13.13 (91)?
SELECT "Date" FROM table_57968 WHERE "Home team score" = '13.13 (91)'
SELECT "Date" FROM "table_57968" WHERE "Home team score" = '13.13 (91)'