CREATE TABLE table_78470 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

On what date was the Essendon home match?
SELECT "Date" FROM table_78470 WHERE "Home team" = 'essendon'
SELECT "Date" FROM "table_78470" WHERE "Home team" = 'essendon'