From Press Release:
Morale in the Tower is low after the fall of a legend: Cayde-6. This year, death has not passed us, it has come to stay. More than ever, it’s important to remember loved ones who have fallen, and to celebrate the fact that we have lived to fight on in their honor. Every Guardian is invited to experience the masquerade.
Festival of the Lost begins on Tuesday October 16th at 10 AM Pacific, and concludes on Tuesday November 6th at 10 AM Pacific.