Day | Saints | Country | Year |
| December 21 |
| Blessed Domenico Spadafora, priest |  Italy | 1521 |
| Blessed Maria Lorenza Longo Requenses (María Lorenza Longo), religious | Italy | 1539 |
| Saint Peter Canisius (Pietro Canisio), priest |  Austria | 1597 |
| Saint Anrê Trần An Dũng (Lạc), priest |  Vietnam | 1839 |
| Saint Phêrô Trương Văn Thi, priest | Vietnam | 1839 |
| Blessed Peter Friedhofen, priest |  Germany | 1860 |
| December 22 |
| Saint Hunger, bishop |  Netherlands | 866 |
| Saint Israel du Dorat, priest |  France | 1014 |
| Blessed William Pike, layperson |  England | 1591 |
| Saint Francesca Saverio Cabrini, religious |  USA | 1917 |
| December 23 |
| Blessed Gaubaldo, bishop | Germany | 761 |
| Saint Frithbert, bishop | England | 766 |
| Saint Yves de Chartres, bishop | France | 1115 |
| Blessed Hartmann di Bressanone, bishop | Italy | 1164 |
| Saint Thorlak Thorhallsson (Þorlákur Þórhallsson), bishop |  Iceland | 1193 |
| Blessed Nicolás Fattore, priest |  Spain | 1583 |
| Saint Marguerite d’Youville (Marie-Marguerite Dufrost de Lajemmerais), religious |  Canada | 1771 |
| Saint Antônio de Sant’Ana Galvão, priest |  Brazil | 1822 |
| Saint Iosephus Cho Yun-ho (조윤호 요셉 / 趙若瑟), layperson |  South Korea | 1866 |
| Blessed Bernabé Toribio, layperson | Spain | 1936 |
| Blessed Bernardino Irurzun Otermín, religious | Spain | 1936 |
| Blessed Eleuterio Marne Mansilla, religious | Spain | 1936 |
| Blessed Eliseo Miguel Largo, priest | Spain | 1936 |
| Blessed Enrique Canal Gómez, priest | Spain | 1936 |
| Blessed Enrique Izquierdo Palacios, priest | Spain | 1936 |
| Blessed Epifanio Gómez Álvaro, priest | Spain | 1936 |
| Blessed Francisco de Paula Aranda Cabrera, priest | Spain | 1936 |
| Blessed José María García Tabar, religious | Spain | 1936 |
| Blessed Manuel Gutiérrez Ceballos, priest | Spain | 1936 |
| Blessed Miguel Rodríguez González, priest | Spain | 1936 |
| Blessed Pedro Luis Luis, religious | Spain | 1936 |
| Blessed Maria Berchmana Johanna (Karoline Anna Leidenix), religious |  Bosnia and Herzegovina | 1941 |
| Blessed Marija Antonija (Jožefa Fabjan), religious | Bosnia and Herzegovina | 1941 |
| Blessed Marija Bernadeta (Terezija Banja), religious | Bosnia and Herzegovina | 1941 |
| Blessed Marija Krizina (Jožefa Bojanc), religious | Bosnia and Herzegovina | 1941 |
| December 24 |
| Saint John Cantius (Jan Kanty), priest |  Poland | 1473 |
| Blessed Bartolomeo Maria Dal Monte, priest | Italy | 1778 |
| Saint Paola Elisabetta (Costanza Cerioli Buzecchi-Tasis), religious | Italy | 1865 |
| Saint Charbel (Youssef Antoun Makhlouf), priest |  Lebanon | 1898 |
| Blessed Francisco Juan Pérez Montávez, priest | Spain | 1936 |
| Blessed Juan Crisóstomo de Gata de Gorgos (Ignacio Caselles García), priest | Spain | 1936 |
| Blessed Pablo Meléndez Gonzalo, layperson | Spain | 1936 |
| December 25 |
| Saint Anastasia of Sirmium, layperson |  Serbia | 304 |
| Blessed Mathieu, cardinal | France | 1135 |
| Saint Pierre-Maurice, abbot | France | 1156 |
| Blessed Michaël Nakashima Saburōemon (マンショ清左衛門), religious |  Japan | 1628 |
| Blessed Maria von den Aposteln (Maria Therese von Wüllenweber), religious | Italy | 1907 |
| Saint Albert (Adam Hilary Bernard Chmielowski), religious | Poland | 1916 |
| Blessed Elia di San Clemente (Teodora Fracasso), religious | Italy | 1927 |
| December 26 |
| Saint Dionysius, pope | Italy | 268 |
| Saint Zosimus, pope | Italy | 418 |
| Saint Jarlath mac Loga, bishop |  Ireland | 540 |
| Saint Eutimio di Sardi, archbishop |  Turkiye | 831 |
| Saint Vicenta María López i Vicuña, religious | Spain | 1890 |
| Blessed Akatha Phuttha (อากาทา พุดทา), layperson |  Thailand | 1940 |
| Blessed Aknaet (Margarita Phila / อักแนส พิลา), religious | Thailand | 1940 |
| Blessed Bibiana Khamphai (บีบีอานา คำไพ), layperson | Thailand | 1940 |
| Blessed Lusia Khambang (ลูซีอา คำบาง), religious | Thailand | 1940 |
| Blessed Maria Phon (มารีอา พร), layperson | Thailand | 1940 |
| Blessed Sesilia Butsi (เซซีลีอา บุดสี), layperson | Thailand | 1940 |
| Blessed Secondo Pollo, priest | Italy | 1941 |
| Blessed André Parsy, layperson | France | 1944 |
| December 27 |
| Saint Fabiola di Roma, layperson | Italy | 399 |
| Saint Nilo da Rossano, abbot | Italy | 1005 |
| Saint John Stone, priest | England | 1539 |
| Blessed Alfredo Parte Saiz, priest | Spain | 1936 |
| Blessed Ambrosio de Santibáñez (Alejo Pan López), priest | Spain | 1936 |
| Blessed José María Corbín Ferrer, layperson | Spain | 1936 |
| Blessed Odoardo Focherini, layperson | Germany | 1944 |
| Blessed Sára (Sarolta Klotild Salkaházi), religious |  Hungary | 1944 |
| Blessed Francesco Spoto, priest |  Congo-Kinshasa | 1964 |
| Blessed Ján Havlík, layperson |  Slovakia | 1965 |
| Blessed Alain Dieulangard, priest |  Algeria | 1994 |
| Blessed Charles Decker, priest | Algeria | 1994 |
| Blessed Christian Chessel, priest | Algeria | 1994 |
| Blessed Jean Chevillard, priest | Algeria | 1994 |
| December 28 |
| Blessed Mattia Nazareni, abbess | Italy | 1320 |
| Saint Francis de Sales (François de Sales), bishop |  Switzerland | 1622 |
| Saint Gaspare del Bufalo, priest | Italy | 1837 |
| Saint Caterina Volpicelli, religious | Italy | 1894 |
| December 29 |
| Saint Évroult d’Ouche (Ebrulfus), abbot | France | 706 |
| Saint Thomas Becket, archbishop | England | 1170 |
| Blessed Gerardo Cagnoli, religious | Italy | 1342 |
| Blessed William Howard, layperson | England | 1680 |
| Saint Barbara Cho Chŭng-i (조증이 바르바라 / 趙曾伊), layperson | South Korea | 1839 |
| Saint Barbara Ko Sun-i (고순이 바르바라 / 高順伊), layperson | South Korea | 1839 |
| Saint Benedicta Hyŏng Kyŏng-nyŏn (현경련 베네딕타 / 玄敬連), layperson | South Korea | 1839 |
| Saint Elisabeth Chŏng Chŏng-hye (정정혜 엘리사벳 / 丁情惠), layperson | South Korea | 1839 |
| Saint Magdalena Han Yŏng-i (한영이 막달레나 / 韓榮伊), layperson | South Korea | 1839 |
| Saint Magdalena Yi Yŏng-dŏk (이영덕 막달레나 / 李榮德), layperson | South Korea | 1839 |
| Saint Petrus Ch’oe Ch’Ang-hŭb (최창흡 베드로 / 崔昌洽), layperson | South Korea | 1839 |
| Blessed Diego de Guadilla (Jacinto Gutiérrez Terciado), religious | Spain | 1936 |
| Blessed Enrique Juan Requena, priest | Spain | 1936 |
| Blessed José Aparicio Sanz, priest | Spain | 1936 |
| Blessed José Perpiñá Nácher, layperson | Spain | 1936 |
| Blessed Juan Bautista Ferreres Boluda, priest | Spain | 1936 |
| Blessed Miguel de Grajal (Aproniano de Felipe González), priest | Spain | 1936 |
| December 30 |
| Saint Felix I, pope | Italy | 274 |
| Saint Perpet de Tours (Perpetuus), archbishop | France | 490 |
| Saint Egwin, bishop | England | 717 |
| Saint Raniero di Teano, bishop | Italy | 1077 |
| Saint David di Munktorp, bishop |  Sweden | 1082 |
| Saint Ruggero di Canne, bishop | Italy | 1129 |
| Saint Lorenzo da Frazzanò (Lorenzo Ravì), priest | Italy | 1162 |
| Blessed Margherita Colonna, religious | Italy | 1280 |
| Blessed Eugenia Maria Ravasco, religious | Italy | 1900 |
| Blessed Giovanni Maria Boccardo, priest | Italy | 1913 |
| December 31 |
| Saint Sylvester I, pope | Italy | 335 |
| Saint Melania the Younger, religious |  Israel | 439 |
| Saint Maire d’Avenches (Marius), bishop | Switzerland | 594 |
| Saint Eustase, archbishop | France | 607 |
| Saint Odilon de Mercœur, abbot | France | 1048 |
| Saint John Francis Regis (Jean-François Régis), priest | France | 1640 |
| Blessed Alain de Solminihac, bishop | France | 1659 |
| Saint Catherine Labouré, religious | France | 1876 |
| Blessed Giuseppina Nicoli, religious | Italy | 1924 |
| Blessed Leandro Gómez Gil, religious | Spain | 1936 |
| Blessed Luis Vidaurrázaga González, priest | Spain | 1936 |
| Blessed Anton Zogaj, priest |  Albania | 1946 |
