CREATE TABLE table_4828 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the date of the game where Footscray was the away team?
SELECT "Date" FROM table_4828 WHERE "Away team" = 'footscray'
SELECT "Date" FROM "table_4828" WHERE "Away team" = 'footscray'