CREATE TABLE table_11892 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

On which date did Footscray play an away game?
SELECT "Date" FROM table_11892 WHERE "Away team" = 'footscray'
SELECT "Date" FROM "table_11892" WHERE "Away team" = 'footscray'