Passion Week

Although Holy Week, which more explicitly concerns the Passion of Christ, might seem to be an appropriate week to be called "Passion Week", it has never officially borne this name, although some did, for a short time, refer to it as the Second Week in Passiontide.

By decision of Pope John XXIII], what had been called "Passion Sunday" became in 1960 the "First Sunday in Passiontide" and the week that followed it, previously known as Passion Week, became the First Week in Passiontide. In 1969, Pope Paul VI changed the name of the Sunday to "Fifth Sunday of Lent" and the week became known as the Fifth Week of Lent.

Most Roman Catholics who use the Tridentine Mass employ the 1962 Roman Missal (as authorized by the motu proprio Summorum Pontificum). This Missal incorporates the changes made by Pope John XXIII in 1960.