Rites of passage

[Lanell]

[Prescribed] forms of [ceremony] used to mark and celebrate significant events [in the life] stages of an individual; birth, puberty, marriage, ordination of a special role, death, etc.

[Magaret]

A ritual or ceremony signifying an event in a persons life [indicative] of a transition from one stage to another, as from [adolescence] to [adulthood].

[Greta]

an official ceremony or informal activity that marks an important stage or occasion in a persons life, especially becoming an adult