CREATE TABLE table_65231 ("Attendance" FLOAT, "Round" TEXT, "Date" TEXT, "Home" TEXT, "Score" TEXT, "Away" TEXT, "Venue" TEXT, "Weekday" TEXT, "Time of Day" TEXT)

On what weekday was the match that had Perth Glory as the away team?
SELECT "Weekday" FROM table_65231 WHERE "Away" = 'perth glory'
SELECT "Weekday" FROM "table_65231" WHERE "Away" = 'perth glory'