 His name (as Cletus) is included in the Roman Canon of the Mass.The Tridentine Calendar reserved 26 April as the feast day of Saint Cletus, who the church honoured jointly with Saint Marcellinus, and 13 July for solely Saint Anacletus.In 1960, Pope John XXIII, while keeping the 26 April feast, which mentions the saint under the name given to him in the Canon of the Mass, removed 13 July as a feast day for Saint Anacletus.