CREATE TABLE table_56512 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

On which date did Geelong play at home?
SELECT "Date" FROM table_56512 WHERE "Home team" = 'geelong'
SELECT "Date" FROM "table_56512" WHERE "Home team" = 'geelong'