This article lists the feast days of the General Roman Calendar as reformed on 23 July 1960 by Pope John XXIII's motu proprio Rubricarum instructum. This 1960 calendar was incorporated into the 1962 edition of the Roman Missal, continued use of which Pope Benedict XVI authorized in his 7 July 2007 motu proprio Summorum Pontificum as an "extraordinary form of the Roman Rite".
Rubricarum instructum replaced the former classifications of Doubles, Semidoubles, and Simples with I, II, and III class feasts and commemorations. It removed a few feasts, in particular duplications such as the Feast of the Cross (3 May and 14 September), the Chair of Peter (18 January and 22 February), Saint Peter (1 August and 29 June), Saint John the Evangelist (6 May and 27 December), Saint Michael (8 May and 29 September), and Saint Stephen (3 August and 26 December).
This calendar is distinct from the General Roman Calendar of 1954 in that it also incorporates the changes made by Pope Pius XII in 1955, which included the reduction of octaves to three only, those of Christmas, Easter and Pentecost. See General Roman Calendar of Pope Pius XII.
Feasts previously ranked as doubles of the I class were reclassified as feasts of the I class. Feasts previously ranked as doubles of the II class were reclassified as feasts of the II class. Feasts previously ranked as greater doubles, doubles, and simples were reclassified as feasts of the III class. Feasts that had formerly been ranked as simples and had been reduced to commemorations in Pius XII's 1955 revision of the calendar remained commemorations.