In Lois Lowry's dystopian novel The Giver, the annual event where children receive their adult roles is the Ceremony of Twelve.
At this ceremony, the community's Committee of Elders assigns each twelve-year-old a future occupation. Jonas attends his ceremony expecting a normal assignment, but the Chief Elder selects him for the unique role of Receiver of Memory. That decision sets the novel's central plot in motion.
The title refers to the age of the children, not to the number of ceremonies or the number of memories Jonas receives. The community organizes people by age through a sequence of formal ceremonies, including events for younger children and the naming of newchildren.
A frequent mix-up is calling the event “Assignment Day.” That phrase describes its function but is not the novel's formal name. The Ceremony of Twelve illustrates how the apparently orderly community removes individual choice, even while presenting its decisions as careful and benevolent.