The Revised Common Lectionary is a three-year cycle of readings from the Bible, used by many Christian churches as the basis for worship services. A trial version was released in 1983, the result of a collaboration between the North American Consultation on Common Texts and the International English Language Liturgical Consultation. The full public release was in 1994. It is based on the 1969 Roman Catholic lectionary, Ordo Lectionum Missae, and similarly to this predecessor, it has four passages for each Sunday, one from each of: See also the Wikipedia article on Revised Common Lectionary.