Propers of the Saints — April
- St. Francis of Paula, Confessor S. Francisci de Paula Confessoris (04-02)
- S. Isidore of Seville, Bishop, Confessor and Doctor of the Church S. Isidori Episcopi Confessoris et Ecclesiæ Doctoris (04-04)
- St. Vincent Ferrer, Confessor S. Vincentii Ferrerii Confessoris (04-05)
- St. Leo the Great, Pope, Confessor and Doctor of the Church S. Leonis I Papæ Confessoris et Ecclesiæ Doctoris (04-11)
- St. Hermenegild, Martyr S. Hermenegildi Martyris (04-13)
- St. Justin, Martyr S. Justini Martyris (04-14)
- Sts. Tiburtius, Valerian et Maximus, Martyrs Ss. Tiburtii, Valeriani, et Maximi Martyrum (04-14t)
- St. Anicetus, Pope and Martyr S. Aniceti Papæ et Martyris (04-17)
- St. Anselm, Bishop, Confessor and Doctor of the Church S. Anselmi Episcopi Confessoris et Ecclesiæ Doctoris (04-21)
- Sts. Soter and Caius, Popes and Martyrs SS. Soteris et Caji Summorum Pontificum et Martyrum (04-22)
- St. George, Martyr S. Georgii Martyris (04-23)
- (04-23pl)
- St. Fidelis of Sigmaringen, Martyr S. Fidelis de Sigmaringa Martyris (04-24)
- St. Mark the Evangelist S. Marci Evangelistæ (04-25)
- Greater Litanies Litaniæ Maiores (04-25c)
- Sts. Cletus and Marcellinus, Popes and Martyrs SS. Cleti et Marcellini Summorum Pontificum et Martyrum (04-26)
- St. Peter Canisius, Confessor and Doctor of the Church S. Petri Canisii Confessoris et Ecclesiæ Doctoris (04-27)
- St. Paul of the Cross, Confessor S. Pauli a Cruce Confessoris (04-28)
- S. Peter Chanel, priest and martyr (04-28n)
- St. Vitalis, Martyr S. Vitalis Martyris (04-28o)
- St. Peter the Martyr S. Petri Martyris (04-29)
- St. Catherine of Siena, Virgin S. Catharinæ Senensis Virginis (04-30)