https://www.gamespot.com/articles/destiny-2-will-celebrate-halloween-this-year-with-/1100-6462366/

Bungie has announced that the Halloween-themed Festival of the Lost event will be making its debut in Destiny 2 this year. First appearing in the original Destiny, Festival of the Lost offers limited-time consumables, emotes, Shaders, and quests.

There hasn't been much information as to what will be included in this year's event. Bungie, in a blog post, wrote that 2018's Festival of the Lost will be "a celebration of lost heroes and a new challenge to tackle. It includes a costume party, and you're all invited. It ends with a quest to solve a murder." The event starts on October 16 at 10 AM PT / 1 PM ET / 6 PM BST. Bungie hasn't released any further details as of this time.