CALENDAR. — The liturgical year is divided into periods generally of seven weeks each: Annunciation or Advent, Epiphany, Lent, Easter, Apostles, Summer, Elijah, the Cross, Moses, the Dedication. The feasts of the saints, called “memories,” are few, and are celebrated either on a fixed date of the year or on the Friday of a given week in a particular period.
THE LITURGICAL BOOKS were published for Catholics in Rome and Milan, and for the Nestorians, through the efforts of the Anglican mission, in Urmia; to the list of A. Baumstark, Liturgie comparée, in Frenikon, 1934, pp. 229–31, should be added a missal published at Mossul in 1936 and a photostatic edition of Bedjan’s breviary in 3 vols., in Rome in 1938.
The translation of the liturgical texts into a European language is found in the general works of J. Assemani, Codex liturgicus, 13 vols., Rome 1749–66; E. Renaudot, Liturgiaum orientalium collectio, Paris 1716; Denzinger, op. cit.; F. E. Brightman, Liturgies Eastern and Western, Oxford 1896. Add: C. Moussess, La Messa caldea degli Apostoli, Rome 1948; D. Dahane, Liturgie de la Sainte Messe selon le rite chaldéen, Paris 1937; G. P. Badger, The Nestorians and their Rituals, 2 vols., London 1852; A. J. Maclean, East Syrian Daily Offices, there 1894; id., The Evening, Night and Morning Services, complete text, with the feast of the Epiphany in Conybeare, Rituale Armenorum, Oxford 1905, pp. 298–388; P. Martin, Saint Pierre et saint Paul dans l'Eglise nestorienne, Paris 1875, complete text for the feast of the two Apostles.