North American Western Rite parishes generally follow one (or sometimes both) of two types of traditional Western liturgical traditions. The majority celebrate the [[Liturgy of St. Tikhon of Moscow]], which is an adaptation of the [[Eucharist|Communion]] service from the 1928 {{citation needed}} Anglican ''Book of Common Prayer'' [http://members.cox.net/stgregoryoc/history.htm#fifteen] and ''The Anglican Missal in the American Edition,'' as their Sunday liturgy. Until 1977, all Western Rite Vicariate parishes celebrated only the [[Liturgy of St. Gregory the Great]], which is a modified form of the Tridentine version of the Mass of Rome, familiar to Roman Catholics before the liturgical reforms of Vatican II in the 1960s. Many parishes within the Western Rite Vicariate continue to celebrate the Gregorian liturgy. However, most WRV parishes celebrate more than one weekly liturgy, and many of the Tikhonite parishes celebrate the Gregorian liturgy on weekdays. The complete Roman rite of Benediction is also authorized.