<P> Josephology, the theological study of Saint Joseph, is one of the most recent theological disciplines . In 1989, on the occasion of the centenary of Quamquam pluries Pope John Paul II issued Redemptoris Custos (Guardian of the Redeemer), which presented Saint Joseph's role in the plan of redemption, as part of the "redemption documents" issued by John Paul II such as Redemptoris Mater to which it refers . </P> <P> Together with the Blessed Virgin Mary and the Child Jesus, Joseph is one of the three members of the Holy Family; since he only appears in the birth narratives of the Gospels, Jesus is depicted as a child when with him . The formal veneration of the Holy Family began in the 17th century by François de Laval . </P> <P> In 1962, Pope John XXIII inserted the name of Joseph in the Canon of the Mass, immediately after that of the Blessed Virgin Mary . In 2013, Pope Francis had his name added to the three other Eucharistic Prayers . </P> <P> March 19, Saint Joseph's Day, has been the principal feast day of Saint Joseph in Western Christianity since the 10th century, and is celebrated by Catholics, Anglicans, many Lutherans and other denominations . In Eastern Orthodoxy, the feast day of Saint Joseph is celebrated on the First Sunday after the Nativity of Christ . In the Roman Catholic church, the Feast of St. Joseph (19 March) is a solemnity (first class if using the Tridentine calendar), and is transferred to another date if impeded (i.e., 19 March falling on Sunday or in Holy Week). </P>

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