Heortology or eortology is a science that deals with the origin and development of religious festivals, and more specifically the study of the history and criticism of liturgical calendars and martyrologies.
Heortology or eortology is a science that deals with the origin and development of religious festivals, and more specifically the study of the history and criticism of liturgical calendars and martyrologies.
A religious festival is a time of special importance marked by adherents to that religion. Religious festivals are commonly celebrated on recurring cycles in a calendar year or lunar calendar. The science of religious rites and festivals is known as heortology.
Within the Evangelical Lutheran branch of Christianity, "festival" is part of the ranking of feast days in the liturgical kalendar.