CREATE TABLE table_20772 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

What date was Adelaide the home team?
SELECT "Date" FROM table_20772 WHERE "Home team" = 'Adelaide'
SELECT "Date" FROM "table_20772" WHERE "Home team" = 'Adelaide'