History of Events

Events are time-limited activities or Seasonal celebrations, as distinct from always-available content. The Destiny 2 Wiki separates Live Events (time-limited with a special activity or mechanic) from Public Events (recurring open-world activities).

Examples listed by Destinypedia

Crimson Days (discontinued as of Season of the Chosen), Festival of the Lost, Iron Banner, Trials of Osiris, Sparrow Racing League, Solstice, The Revelry, Guardian Games. Gear tagged with an event source drops from these.