CREATE TABLE table_10502 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

If the Venue was princes park, which Date did the game take place on?
SELECT "Date" FROM table_10502 WHERE "Venue" = 'princes park'
SELECT "Date" FROM "table_10502" WHERE "Venue" = 'princes park'