CREATE TABLE table_30951 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Ground" CLOB, "Date" CLOB)

When was the home team Essendon?
SELECT "Date" FROM table_30951 WHERE "Home team" = 'Essendon'
SELECT "Date" FROM "table_30951" WHERE "Home team" = 'Essendon'