CREATE TABLE table_51519 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

When the home team was hawthorn, what was the date?
SELECT "Date" FROM table_51519 WHERE "Home team" = 'hawthorn'
SELECT "Date" FROM "table_51519" WHERE "Home team" = 'hawthorn'