lectionary

Christianity
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lectionary, in Christianity, a book containing portions of the Bible appointed to be read on particular days of the year. The word is also used for the list of such Scripture lessons. The early Christians adopted the Jewish custom of reading extracts from the Old Testament on the Sabbath. They soon added extracts from the writings of the Apostles and Evangelists, which later would be formalized in the canon of Scripture as the Gospels and epistles. During the 3rd and 4th centuries several systems of lessons were devised for churches of various localities. One of the first attempts for a diocese to fix definite readings for special seasons during the year was made by Musaeus of Marseille in the mid-5th century.

At first, the lessons were marked off in the margins of manuscripts of the Scriptures. Later, special lectionary manuscripts were prepared, containing in proper sequence the appointed passages. The Greek Orthodox Church developed two forms of lectionaries, one (Synaxarion) arranged in accord with the ecclesiastical year and beginning with Pascha (Easter) and the other (Mēnologion) arranged according to the civil year (beginning September 1) and commemorating the festivals of various saints and churches. Other national churches produced similar volumes. Among the Western churches during the medieval period, the ancient usage at Rome prevailed, with its emphasis on Advent.

During the 16th-century Reformation the Lutherans and Anglicans made changes in the Roman Catholic lectionaries. Martin Luther was dissatisfied with the choice of many of the lessons from the epistles in the Roman system, and he included a greater proportion of doctrinal passages. In the Anglican church the first edition of The Book of Common Prayer (1549) assigned for each day a passage of the Old Testament and the New Testament to be read at both the morning and evening services. Nearly all the saints’ days were dropped, and the new system assigned chapters of the Bible to be read consecutively.

Holy week. Easter. Valladolid. Procession of Nazarenos carry a cross during the Semana Santa (Holy week before Easter) in Valladolid, Spain. Good Friday
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In 1963 the Second Vatican Council allowed the introduction of the vernacular in the variable parts of the Roman Catholic liturgy, including the scriptural readings of the mass (the liturgy of the Word). A complete revision of the missal, carried out by a postconciliar commission, resulted in a three-year lectionary known as the Ordo Lectionum Missae (1969). This lectionary is arranged in two cycles, one for Sundays and another for weekdays. The Sunday cycle is divided into three liturgical years, labeled A, B, and C. Each Sunday usually has a reading from the Old Testament, a semicontinuous reading from one of the epistles, and a Gospel reading. Year A mostly features the Gospel According to Matthew; Year B reads through the Gospel According to Mark; and Year C showcases the Gospel According to Luke. The Gospel According to John is read during the Easter season in all three years. After three years the cycle starts over again.

The weekday cycle is divided into two years: Year I (odd-numbered years, such as 2023, 2025, etc.) and Year II (even-numbered years, such as 2024, 2026, etc.); the year of the cycle changes on the first Sunday of Advent. The first reading on weekdays may be taken from the either the Old or the New Testament, and usually a single scriptural book is read semicontinuously until it is finished and then a new book is started. The Gospel readings for both years are the same and are also read semicontinuously, beginning with Mark, then Matthew and Luke. As with the Sunday cycle, the Gospel According to John is read during the Easter season. In addition to the Sunday and weekday cycles, the Roman Catholic lectionary also provides readings for the feasts of major saints, for common celebrations such as Marian feasts, for ritual masses such as weddings and funerals, and for various other needs.

Present-day liturgists in many denominations have been active in revising traditional lectionary systems. Many Protestant churches in the United States and other English-speaking areas use the Revised Common Lectionary (1992). A previous version, the Common Lectionary, was assembled in 1983. Both versions are three-year lectionaries that function similarly to the Roman Catholic system.

The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Melissa Petruzzello.