Classification of Feasts
In the Orthodox Church, liturgical celebrations are ranked according to a hierarchy of several classifications. Each class as its own characteristics and is expressed in the divine servcies and disciplines of the Church in a particular way. See also feast day.
Pascha is in a class of its own, ranking above all other commemorations.
The lesser classes—Third Class Feasts, Fourth Class Feasts, and Fifth Class Feasts—commemorate the lives of the saints, holy events, and holy objects. Between the Third Class and Fourth Class there are two Intermediate Classes.