 The 14 February 1961 Instruction of the Congregation for Rites on the application to local calendars of Pope John XXIII's motu proprio "Rubricarum instructum" of 25 July 1960, decreed that "the feast of 'Saint Anacletus', on whatever ground and in whatever grade it is celebrated, is transferred to 26 April, under its right name, 'Saint Cletus'".Use of this calendar, which is included in the 1962 edition of the Roman Missal, continues to be authorized under the conditions indicated in the motu proprio "Summorum Pontificum"; but the feast has been removed from the General Roman Calendar since 1969.Although the day of his death is unknown, Saint Cletus continues to be listed in the Roman Martyrology among the saints of 26 April.