| Date | Age | Event | Bishop | Title | Current Title | 
|---|
| 1 Apr |  | Born | Maurizio Raspini † |  | Bishop Emeritus of Oppido Mamertina, Italy | 
| 2 Apr | 51.2 | Selected | Pierre-Marie-Etienne-Gustave Ardin † | Archbishop of Sens (-Auxerre), France | 
| 61.7 | Selected | Jean-Baptiste Frérot † | Bishop of Angoulême, France | 
| 28.5 | Ordained Priest | Graziano Génnaro, O.F.M. † | Priest of Order of Friars Minor | Vicar Apostolic of Eastern Hupeh {Hu-Pè Orientale}, China | 
| 58.1 | Selected | Jean-Marie-François Lamouroux † | Bishop of Saint-Flour, France | 
| 55.8 | Selected | Alfred-Casimir-Alexis Williez † | Bishop of Arras (-Boulogne-Saint-Omer), France | 
| 3 Apr | 25.7 | Ordained Priest | Godefroy Frederix, C.I.C.M. † | Priest of Congregation of the Immaculate Heart of Mary | Vicar Apostolic of Ninghsia, China | 
| 58.1 | Ordained Bishop | Giuseppe Maria Graniello, B. † | Titular Archbishop of Caesarea Ponti | Cardinal, Cardinal-Priest of Santi Quirico e Giulitta | 
| 44.1 | Ordained Bishop | Pablo Padilla y Bárcena † | Titular Bishop of Pentacomia | Bishop of Tucumán, Argentina | 
|  | Born | Teodoro Schu, S.V.D. † |  | Bishop of Yanzhou [Yenchow], China | 
| 23.4 | Ordained Priest | Everard Ter Laak, C.I.C.M. † | Priest of Congregation of the Immaculate Heart of Mary | Vicar Apostolic of Siwantze [Chongli-Xiwanzi], China | 
| 5 Apr | 39.0 | Appointed | Joseph-Médard Émard † | Bishop of Valleyfield, Québec, Canada | Archbishop of Ottawa, Ontario, Canada | 
| 49.4 | Appointed | St. Antonino Fantosati, O.F.M. Ref. † | Vicar Apostolic of Southern Hunan {Hu-Nan Meridionale}, China | 
| 49.4 | Appointed | St. Antonino Fantosati, O.F.M. Ref. † | Titular Bishop of Adraa | Vicar Apostolic of Southern Hunan {Hu-Nan Meridionale}, China | 
| 6 Apr | 80.2 | Died | Tomás Belestá y Cambeses † | Bishop of Zamora, Spain | 
|  | Born | José Weimann, C.Ss.R. † |  | Bishop of Santiago del Estero, Argentina | 
| 7 Apr | 58.0 | Installed | Antonio María Cascajares y Azara † | Archbishop of Valladolid, Spain | Cardinal, Archbishop of Zaragoza, Spain | 
| 8 Apr | 54.9 | Appointed | Sahag (Isaac) Hagian † | Bishop of Sivas {Sebaste} (Armenian), Turkey | Archbishop Emeritus of Sivas {Sebaste} (and Tokat {Toqat}) (Armenian), Turkey | 
| 54.9 | Ordained Bishop | Sahag (Isaac) Hagian † | Bishop of Sivas {Sebaste} (Armenian), Turkey | Archbishop Emeritus of Sivas {Sebaste} (and Tokat {Toqat}) (Armenian), Turkey | 
| 42.2 | Appointed | Michel-Thomas Labrecque † | Bishop of Chicoutimi, Québec, Canada | Bishop Emeritus | 
| 36.6 | Appointed | Boghos Bédros (Paul Peter) XIII Terzian † | Bishop of Adana (Armenian), Turkey | Patriarch Emeritus of Cilicia (Armenian), Lebanon | 
| 36.6 | Ordained Bishop | Boghos Bédros (Paul Peter) XIII Terzian † | Bishop of Adana (Armenian), Turkey | Patriarch Emeritus of Cilicia (Armenian), Lebanon | 
| 59.9 | Appointed | Herbert Alfred Henry Vaughan † | Cardinal, Archbishop of Westminster, England, Great Britain | 
| 10 Apr | 55.6 | Ordained Bishop | Gyula Firczák † | Bishop of Mukachevo (Munkács) (Ruthenian), Ukraine | 
| 11 Apr | 80.6 | Selected | Antolín Monescillo y Viso † | Cardinal, Archbishop of Toledo, Spain | 
| 14 Apr |  | Born | Zygmunt Choromański † |  | Auxiliary Bishop of Warszawa {Warsaw}, Poland | 
| 15 Apr |  | Born | Joseph-Charles Lefèbvre † |  | Cardinal, Archbishop Emeritus of Bourges, France | 
|  | Born | Cesare Zerba † |  | Cardinal, Secretary Emeritus of the Congregation of the Discipline of the Sacraments | 
| 16 Apr |  | Born | Thomas John Flynn † |  | Coadjutor Archbishop of Saint John’s, Newfoundland, Canada | 
| 24.0 | Ordained Priest | José Antônio de Oliveira Lopes † | Priest | Bishop of Pesqueira, Pernambuco, Brazil | 
| 22.5 | Ordained Priest | Carmelo Patané † | Priest of Acireale, Italy | Archbishop of Catania, Italy | 
| 24.2 | Ordained Priest | Miguel de los Santos Serra y Sucarrats † | Priest | Bishop of Segorbe, Spain | 
| 17 Apr | 25.1 | Ordained Priest | Giovanni Battista Rosa † | Priest of Mantova, Italy | Archbishop of Perugia, Italy | 
| 21 Apr | 64.2 | Died | Alessio Maria Biffoli, O.S.M. † | Bishop of Fossombrone, Italy | 
| 22 Apr |  | Born | James Kalacherry (Kalassery) † |  | Bishop of Changanacherry (Syro-Malabar), India | 
| 24 Apr | 28.3 | Ordained Priest | Antônio Augusto de Assis † | Priest | Bishop of Jaboticabal, Sao Paulo, Brazil | 
| 23.7 | Ordained Priest | Prudencio Gomes da Silva † | Priest | Bishop of Goiás, Brazil | 
| 25.2 | Ordained Priest | Augustyn Łosiński † | Priest | Bishop of Kielce, Poland | 
| 49.2 | Ordained Bishop | Joaquín Pardo y Vergara † | Bishop of Medellín, Colombia | Archbishop of Medellín, Colombia | 
| 25 Apr | 41.4 | Succeeded | Pierre-Jean-Marie Gendreau, M.E.P. † | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam | Vicar Apostolic of Hà Nôi, Viet Nam | 
| 38.2 | Ordained Bishop | Charles Edward McDonnell † | Bishop of Brooklyn, New York, USA | 
|  | Born | Giuseppe Maria Palatucci, O.F.M. Conv. † |  | Bishop of Campagna, Italy | 
| 56.8 | Died | Paul-François Puginier, M.E.P. † | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam | 
| 27 Apr | 56.4 | Appointed | José Pereira da Silva Barros † | Archbishop of São Sebastião do Rio de Janeiro, Brazil | Archbishop Emeritus | 
|  | Born | Fiorenzo Umberto Tessiatore, O.F.M. † |  | Vicar Apostolic of Sianfu, China | 
| 29 Apr | 48.5 | Appointed | Michael Francis Howley † | Vicar Apostolic of Western Newfoundland (St. George’s), Canada | Archbishop of Saint John’s, Newfoundland, Canada | 
| 48.5 | Appointed | Michael Francis Howley † | Titular Bishop of Amastris | Archbishop of Saint John’s, Newfoundland, Canada | 
| 67.9 | Appointed | Giuseppe Zaffino † | Archbishop of Athēnai {Athens}, Greece | 
| 30 Apr |  | Born | Ernesto Sena de Oliveira † |  | Bishop Emeritus of Coimbra, Portugal | 
| 1 May | 36.4 | Ordained Bishop | Thomas Audo † | Archbishop of Urmyā {Urmia, Rezayeh} (Chaldean), Iran | 
| 54.2 | Died | Andrés Chinchón, O.P. † | Vicar Apostolic of Amoy, China | 
| 55.6 | Installed | Gyula Firczák † | Bishop of Mukachevo (Munkács) (Ruthenian), Ukraine | 
|  | Born | Pēteris Strods † |  | Apostolic Administrator of Riga, Latvia | 
| 2 May | 37.8 | Appointed | Emmanuel Alfonso van den Bosch, O.F.M. Cap. † | Archbishop of Agra, India | Archbishop Emeritus | 
| 3 May | 70.1 | Resigned | Joseph Guyodo, C.S.Sp. † | Prefect of French Guiana-Cayenne, Antilles | Prefect Emeritus | 
| 4 May | 48.4 | Appointed | John Stephen Michaud † | Coadjutor Bishop of Burlington, Vermont, USA | Bishop | 
| 48.4 | Appointed | John Stephen Michaud † | Titular Bishop of Modra | Bishop of Burlington, Vermont, USA | 
| 5 May |  | Born | João Batista Cavati, C.M. † |  | Bishop Emeritus of Caratinga, Minas Gerais, Brazil | 
| 53.5 | Ordained Bishop | Henry Gabriels † | Bishop of Ogdensburg, New York, USA | 
| 8 May | 26.3 | Ordained Priest | Paolo Schirò † | Priest of Monreale, Italy | Titular Bishop of Benda | 
| 15 May | 39.9 | Ordained Bishop | Wladyslaw Michal Zaleski † | Titular Archbishop of Thebae | Titular Patriarch of Antiochia {Antioch} | 
| 19 May | 66.4 | Died | Celestino (Raffaele) Zini, Sch. P. † | Archbishop of Siena, Italy | 
| 20 May | 26.6 | Ordained Priest | Joseph Gaudentius Anderson † | Priest of Boston, Massachusetts, USA | Auxiliary Bishop | 
| 25.2 | Ordained Priest | James Anthony Walsh, M.M. † | Priest of Boston, Massachusetts, USA | Superior General of Catholic Foreign Mission Society of America | 
| 22 May | 53.7 | Resigned | François-Xavier Bossé † | Prefect of Golfe St-Laurent, Québec, Canada | Prefect Emeritus of Golfe St-Laurent, Québec, Canada | 
| 59.3 | Ordained Bishop | Rafael Celedón † | Bishop of Santa Marta, Colombia | 
| 42.3 | Ordained Bishop | Michel-Thomas Labrecque † | Bishop of Chicoutimi, Québec, Canada | Bishop Emeritus | 
| 56.0 | Appointed | Louis-Philippe Walter, C.S.Sp. † | Prefect of Isole di Mayotta, Nossi-Bé e Comore, Madagascar | Prefect Emeritus | 
| 26 May |  | Born | José Constantino García Pulgar, O.S.A. † |  | Vicar Apostolic of Iquitos, Peru | 
| 68.1 | Resigned | Auguste Marchal † | Auxiliary Bishop of Bourges, France | Auxiliary Bishop Emeritus | 
| 70.0 | Died | Jean-Joseph Marchal † | Archbishop of Bourges, France | 
| 27 May | 58.0 | Appointed | Wilhelmus van de Ven † | Bishop of ’s-Hertogenbosch (Bois-le-Duc), Netherlands | 
| 28 May | 58.4 | Died | Patrick Thomas O’Reilly † | Bishop of Springfield in Massachusetts, USA | 
| 29 May | 41.5 | Ordained Bishop | Manuel José Caicedo (Caycedo) Martínez † | Bishop of Pasto, Colombia | Archbishop of Medellín, Colombia | 
| 31 May | 44.0 | Appointed | Nerses Djindoyan, C.A.M. † | Bishop of Musc (Mush) (Armenian), Armenia | 
| 44.0 | Ordained Bishop | Nerses Djindoyan, C.A.M. † | Bishop of Musc (Mush) (Armenian), Armenia | 
| 62.1 | Appointed | Stefano Melchisedechian † | Titular Bishop of Tingis | Bishop Emeritus of Erzerum (Garin) (Armenian) | 
|  | Born | Andreas Rohracher † |  | Archbishop Emeritus of Salzburg, Austria | 
| 2 Jun | 55.0 | Appointed | Sahag (Isaac) Hagian † | Archbishop of Sivas {Sebaste} (and Tokat {Toqat}) (Armenian), Turkey | Archbishop Emeritus | 
| 3 Jun | 38.3 | Appointed | Alexandre-Louis-Victor-Aimé Le Roy, C.S.Sp. † | Vicar Apostolic of Gabon, Gabon | Superior General Emeritus of Congregation of the Holy Spirit | 
| 38.3 | Appointed | Alexandre-Louis-Victor-Aimé Le Roy, C.S.Sp. † | Titular Bishop of Alinda | Superior General Emeritus of Congregation of the Holy Spirit | 
| 43.2 | Appointed | Rogatien-Joseph Martin, SS.CC. † | Titular Bishop of Verinopolis | Vicar Apostolic of Marquesas Islands {Isole Marchesi}, French Polynesia, Pacific (Oceania) | 
| 43.2 | Appointed | Rogatien-Joseph Martin, SS.CC. † | Vicar Apostolic of Marquesas Islands {Isole Marchesi}, French Polynesia, Pacific (Oceania) | 
| 52.7 | Appointed | Gulstan Francis Ropert, SS.CC. † | Vicar Apostolic of Hawaiian Islands, USA | 
| 52.7 | Appointed | Gulstan Francis Ropert, SS.CC. † | Titular Bishop of Panopolis | Vicar Apostolic of Hawaiian Islands, USA | 
| 4 Jun | 34.4 | Appointed | Johann Schäfer, S.V.D. † | Pro-Prefect of Togo | Pro-Prefect Emeritus | 
| 5 Jun | 47.2 | Ordained Bishop | Jules-Étienne Gazaniol † | Titular Bishop of Thuburbo Minus | Bishop Emeritus of Constantine (-Hippone), Algeria | 
| 48.1 | Ordained Bishop | Spiridion Poloméni † | Titular Bishop of Ruspae | Auxiliary Bishop of Carthage, Tunisia | 
| 49.4 | Ordained Bishop | Jean-Joseph Tournier † | Titular Bishop of Hippo Diarrhytus | Auxiliary Bishop of Carthage, Tunisia | 
| 6 Jun | 61.4 | Ordained Bishop | Jean-Clément Mamarbachi † | Archbishop of Damas (Syrian), Syria | 
| 7 Jun | 24.3 | Ordained Priest | Pavel Huyn † | Priest | Archbishop Emeritus of Praha {Prague}, Czechia | 
| 9 Jun | 39.1 | Ordained Bishop | Joseph-Médard Émard † | Bishop of Valleyfield, Québec, Canada | Archbishop of Ottawa, Ontario, Canada | 
| 10 Jun | 20.2 | Ordained Priest | Athanase Melèce Onésime Sawoya, B.C. † | Priest of Basilian Chouerite Order of Saint John the Baptist (Melkite Greek) | Archbishop of Beirut and Jbeil {Bairut e Gibail} (Melkite Greek), Lebanon | 
| 11 Jun | 22.6 | Ordained Priest | Santos Ballesteros y López, O.A.R. † | Priest of Order of Augustinian Recollects | Vicar Apostolic Emeritus of Casanare, Colombia | 
| 25.6 | Ordained Priest | Daniel Champavier † | Priest of Marseille, France | Bishop | 
| 25.9 | Ordained Deacon | Jean-Louis Clerc-Renaud, C.M. † | Deacon of Congregation of the Mission | Vicar Apostolic Emeritus of Yükiang [Yujiang], China | 
| 22.6 | Ordained Priest | Nicola Cola † | Priest of Camerino, Italy | Bishop of Nocera Umbra-Gualdo Tadino, Italy | 
| 24.3 | Ordained Priest | Eugène Curien † | Priest of Saint-Dié, France | Bishop Emeritus of La Rochelle (-Saintes), France | 
| 25.1 | Ordained Priest | José Antonio Eguiguren y Escudero † | Priest of Loja, Ecuador | Bishop | 
| 23.0 | Ordained Priest | Pompeo Ghezzi † | Priest of Milano {Milan}, Italy | Bishop Emeritus of Sansepolcro (Borgo San Sepolcro), Italy | 
| 23.4 | Ordained Priest | Jean-Baptiste-Auguste Gonon † | Priest | Bishop of Moulins, France | 
| 23.5 | Ordained Priest | Julien-Marie Leventoux, C.I.M. † | Priest of Congregation of Jesus and Mary | Vicar Apostolic Emeritus of Golfe St-Laurent, Québec, Canada | 
| 25.9 | Ordained Priest | John Baptist Morris † | Priest of Nashville, Tennessee, USA | Bishop of Little Rock, Arkansas, USA | 
| 24.6 | Ordained Priest | Ernesto Maria Piovella, Obl. Rho † | Priest of Milano {Milan}, Italy | Archbishop of Cagliari, Italy | 
| 23.5 | Ordained Priest | Louis-Marie Ricard † | Priest | Bishop of Nice, France | 
| 22.5 | Ordained Priest | Isidoro (Mihovil) Sain, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Rijeka (-Opatija), Croatia | 
| 27.1 | Ordained Priest | Manuel San Román y Elena † | Priest | Apostolic Administrator of Calahorra y La Calzada, Spain | 
| 12 Jun | 25.4 | Ordained Priest | Antoine Bahabanian † | Priest | Bishop of Cesarea di Cappadocia (Armenian), Turkey | 
| 23.0 | Ordained Priest | Lorenzo Angelo Bartolomasi † | Priest of Torino {Turin}, Italy | Archbishop Emeritus of Italy, Military | 
| 57.4 | Resigned | Lorenzo Petris de Dolammare † | Bishop of Sapë, Albania | Bishop Emeritus | 
| 25.5 | Ordained Priest | Louis-Justin Gumy, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Bishop Emeritus of Port Victoria o Seychelles | 
| 33.4 | Appointed | Paolo Massad † | Archbishop of Damas (Maronite), Syria | 
| 38.3 | Appointed | Giovanni Murad † | Bishop of Baalbek (Maronite), Lebanon | 
| 38.3 | Ordained Bishop | Giovanni Murad † | Bishop of Baalbek (Maronite), Lebanon | 
| 47.4 | Appointed | Nematalla Seluan † | Archbishop of Cyprus (Maronite) | 
| 13 Jun | 24.6 | Professed | Plácido Ángel Rey de Lemos, O.F.M. † | Priest of Order of Friars Minor | Bishop Emeritus of Lugo, Spain | 
| 15 Jun | 65.2 | Died | Jacques-Théodore Lamarche † | Bishop of Quimper [Cornouailles](-Léon), France | 
| 18 Jun | 49.4 | Installed | Joaquín Pardo y Vergara † | Bishop of Medellín, Colombia | Archbishop of Medellín, Colombia | 
| 19 Jun | 25.4 | Ordained Priest | William Timothy Cotter † | Priest of Cloyne, Ireland | Bishop of Portsmouth, England, Great Britain | 
| 22 Jun | 44.5 | Appointed | Ange-Louis Tibéri † | Prefect of Iles Saint-Pierre et Miquelon | Prefect Emeritus | 
| 24 Jun |  | Born | Costantino Maria Attilio Barneschi, O.S.M. † |  | Bishop of Manzini, eSwatini | 
| 48.7 | Ordained Bishop | Michael Francis Howley † | Titular Bishop of Amastris | Archbishop of Saint John’s, Newfoundland, Canada | 
|  | Born | Jan Piotr Stepa † |  | Bishop of Tarnów, Poland | 
| 25 Jun | 49.3 | Appointed | John Conmy † | Coadjutor Bishop of Killala, Ireland | Bishop | 
| 49.3 | Appointed | John Conmy † | Titular Bishop of Germanicopolis | Bishop of Killala, Ireland | 
| 22.8 | Ordained Priest | Ferenc Virág † | Priest | Bishop of Pécs, Hungary | 
| 26 Jun | 72.7 | Died | Augusto Theodoli † | Cardinal, Cardinal-Deacon of Santa Maria della Scala | 
| 24.5 | Ordained Priest | Jules Tiberghien † | Priest | Titular Archbishop of Nicaea | 
| 28 Jun | 66.1 | Died | Henricus (Joseph-Gauthier-Henri) Smeulders, O. Cist. † | Priest of Order of Cistercians | 
| 29 Jun | 22.5 | Ordained Priest | Amiel-François Bessière † | Priest | Bishop of Constantine (-Hippone), Algeria | 
| 23.0 | Ordained Priest | Marián Bláha † | Priest | Bishop of Banská Bystrica, Slovakia | 
| 17.5 | Entered | Ludovicus Lombard, O.F.M. Cap. † | Member of Order of Friars Minor Capuchin | Prefect Emeritus of Djibouti (Gibuti) | 
| 22.7 | Ordained Priest | Martin Kheberich † | Priest of Spiš, Slovakia | Auxiliary Bishop | 
| 48.5 | Ordained Bishop | John Stephen Michaud † | Titular Bishop of Modra | Bishop of Burlington, Vermont, USA | 
| 22.6 | Ordained Deacon | Octave-Louis Pasquet † | Deacon of Coutances (-Avranches), France | Bishop Emeritus of Sées {Séez}, France | 
| 30 Jun |  | Born | Pedro Pablo (Luis Reinaldo) Andrade Sánchez, O.F.M. † |  | Prefect Emeritus of Galápagos, Ecuador |