CREATE TABLE music_festival (Date_of_ceremony VARCHAR2, Volume VARCHAR2)
CREATE TABLE volume (Volume_ID VARCHAR2, Weeks_on_Top NUMBER)

Please show the date of ceremony of the volumes that last more than 2 weeks on top.
SELECT T1.Date_of_ceremony FROM music_festival AS T1 JOIN volume AS T2 ON T1.Volume = T2.Volume_ID WHERE T2.Weeks_on_Top > 2
SELECT "T1"."Date_of_ceremony" FROM "music_festival" "T1" JOIN "volume" "T2" ON "T1"."Volume" = "T2"."Volume_ID" AND "T2"."Weeks_on_Top" > 2