| Celebration | Name | Saint | Birth | Death |
|---|---|---|---|---|
| 24 of June | María de Guadalupe | Blessed María de Guadalupe García Zavala | 1878 Mexico | 1963 Mexico |
| 25 of June | Max | Saint Max of Turin | Italy | |
| 25 of June | Moloc | Saint Moloc of Escocia | 592 United kingdom | |
| 26 of June | Magdalena | Blessed Magdalen Fontaine and companions | France | 1794 France |
| 26 of June | Maxencio | Saint Maxencio of Poitiers | 515 France | |
| 26 of June | Mykola | Blessed Mykola Konrad | Ukraine | 1941 Ukraine |
| 27 of June | Margarita | Blessed Marguerite Bays | 1879 Switzerland | |
| 28 of June | María | Saint María Du Zhaozhi | 1900 China | |
| 30 of June | Marcial | Saint Marcial of Limoges | France | |
| 1 of July | Martín | Saint Martín of Vienne | France | |
| 2 of July | Martiniano | Saint Martiniano mártir | ||
| 2 of July | Marcia | Saint Marcia mártir | 285 Italy | |
| 2 of July | Monegunda | Saint Monegunda of Tours | 557 France | |
| 3 of July | Muciano | Saint Muciano of Mesia | Italy | |
| 3 of July | Mustiola | Saint Mustiola of Chiusi | 273 Italy | |
| 3 of July | Marcos | Saint Marcos of Mesia | Italy | |
| 3 of July | Memnón | Saint Memnón of Bizia | Turkey | |
| 3 of July | María | Blessed Maria Ana Mogas Fontcuberta | 1827 Spain | 1886 Spain |
| 5 of July | Marta | Saint Marta of Siria | 551 Syrian arab republic | |
| 6 of July | María | Saint Mary Goretti | 1890 Italy | 1902 Italy |
| 6 of July | María | Blessed Maria Teresa Ledochowska | 1922 Italy | |
| 6 of July | Monena | Saint Monena | 517 Ireland | |
| 7 of July | Marcos | Saint Marcos Ji Tianxiang | 1900 China | |
| 7 of July | Mel | Saint Mel Ruain | Ireland | 789 Ireland |
| 7 of July | María | Blessed María Romero Meneses | 1902 Nicaragua | 1977 Nicaragua |
| 7 of July | María | Saint María Guo Lizhi y compañeros | 1900 China | |
| 8 of July | Mancio | Blessed Mancius Araki | Japan | 1626 Japan |
| 9 of July | María | Blessed Mary of Jesus Crucified Petkovic | 1892 Croatia (Hrvatska) | 1966 Italy |
| 10 of July | Manuel | Blessed Manuel Ruiz and companions | 1804 Spain | 1860 Syrian arab republic |
| 10 of July | María | Blessed Marie Gertrude of Saint Sophia | 1794 France | |
| 11 of July | Marciana | Saint Marciana of Mauritania | 303 Mauritania | |
| 11 of July | Marciano | Saint Marciano of Iconio | Turkey | |
| 12 of July | Matías | Blessed Matthew Araki and seven companions | 1626 Japan | |
| 13 of July | Miropa | Saint Miropa of Chíos | Greece | |
| 14 of July | Marchelmo | Saint Marchelmo of Deventer | 775 Netherlands | |
| 15 of July | Miguel | Blessed Michel Bernard Marchand | 1794 France | |
| 16 of July | María | Saint María Magdalena Postel | 1846 France | |
| 17 of July | Marcelina | Saint Marcelina of Milán | Italy | |
| 18 of July | Materno | Saint Materno of Milán | Italy | |
| 19 of July | Macrina | Saint Macrina of Annesis | 379 Italy | |
| 20 of July | María | Saint María Fu Guilin | 1900 China | |
| 20 of July | Marina | Saint Marina of Antioquía of Pisidia | Turkey | |
| 22 of July | Magdalena | Saint Mary Magdalene | Israel | |
| 22 of July | Meneleo | Saint Meneleo of Menat | France | |
| 24 of July | Meneo | Saint Meneo of Licia | Italy | |
| 24 of July | María de la Merced | Blessed Mary of Merci Prat | 1936 Spain | |
| 24 of July | Modestino | Blessed Modestino of Jesus and of Mary Mazzarell | 1854 Italy | |
| 25 of July | Magnerico | Saint Magnerico of Tréveris | 596 Italy | |
| 25 of July | Michael | Blessed Michel Louis Brulard | 1794 France | |
| 25 of July | María | Blessed Maria Teresa Kowalska | 1902 Poland | 1941 Poland |
| 25 of July | María | Blessed Maria del Carmen Salles y Barangueras | 1911 Spain | |
| 26 of July | María | Blessed Marie Margaret and companions | 1794 | |
| 27 of July | María | Blessed Mary Clement of the Crucified Jesus Staszewska | 1890 Poland | 1943 Poland |
| 27 of July | María | Blessed Mary Magdalene Martinengo | 1737 Italy | |
| 27 of July | Modesto | Blessed Modesto Vegas Vegas | 1936 Spain | |
| 28 of July | Melchor | Saint Melchor García Sampedro | 1858 Viet nam | |
| 29 of July | Marta | Saint Martha of Bethany | Israel | |
| 30 of July | Manes | Blessed Manes Guzman | 1170 Spain | 1235 Spain |
| 30 of July | María | Saint María of Jesús Sacramentado | 1868 Mexico | 1959 Mexico |
| 30 of July | María | Blessed María Vicenta of Saint Dorothy | 1867 Mexico | 1949 Mexico |
| 31 of July | Michal | Blessed Michal Ozieblowski | Poland | 1942 Germany |
| 1 of August | María | Blessed Maria Stella of the Holy Sacrament and companions | Poland | 1943 Poland |
| 2 of August | Máximo | Saint Máximo of Padua | Italy | |
| 3 of August | Martín | Saint Martín of Másico | 580 Italy | |
| 5 of August | Memmio | Saint Memmio of Chalons | France | |
| 5 of August | Margarita | Saint Margarita of Septémpeda | 1395 Italy | |
| 6 of August | María | Blessed Maria Francisca de Jesus Rubatto | 1904 Uruguay | |
| 7 of August | Miguel | Saint Miguel of la Mora | Mexico | |
| 8 of August | Marino | Saint Marino of Anazarbe | 311 Turkey | |
| 8 of August | Mummolo | Saint Mummolo of Burdeos | 678 France | |
| 11 of August | Mauricio | Blessed Maurice Tornay | 1910 Switzerland | 1949 China |
| 11 of August | Miguel | Blessed Miguel Domingo Cendra | 1909 Spain | 1936 Spain |
| 14 of August | Maximiliano | Saint MaximilianKolbe | 1894 Poland | 1941 Poland |
| 14 of August | Marcelo | Saint Marcelo of Apamea | 390 Syrian arab republic | |
| 17 of August | Mamas | Saint Mamante of Cesárea | Turkey | |
| 17 of August | Mirón | Saint Mirón of Cizico | Greece | |
| 18 of August | Martín | Blessed Martin Martínez Pascual | 1936 Spain | |
| 18 of August | Macario | Saint Macario of Bitinia | 850 Turkey | |
| 19 of August | Magín | Saint Magín of Tarragona | Spain | |
| 19 of August | Magno | Saint Magno of Aviñón | France | 660 Italy |
| 20 of August | María | Blessed Maria Climent Mateu | 1936 Spain | |
| 20 of August | María | Blessed Maria de Mattias | 1866 Italy | |
| 20 of August | Máximo | Saint Máximo of Chinon | France | |
| 21 of August | Maximiano | Saint Maximiano of Antioquía | 308 Syrian arab republic | |
| 23 of August | Minervo | Saint Minervo mártir | ||
| 24 of August | Maximiano | Blessed Maksymilian Binkiewicz | 1908 Poland | 1942 Germany |
| 25 of August | Menas | Saint Menas of Constantinopla | 552 Turkey | |
| 25 of August | María | Blessed María Cabanillas | 1821 Argentina | 1885 Argentina |
| 26 of August | Maximiliano | Saint Maximiliano of Roma | Italy | |
| 26 of August | María | Blessed Mary of Jesus Crucified Baouardy | 1846 Israel | 1878 Israel |
| 26 of August | Melquisedec | Saint Melquisedec Rey | ||
| 27 of August | Mónica | Saint Monica | 331 Algeria | 387 Italy |
| 27 of August | María | Blessed María del Pilar Izquierdo Albero | 1945 Spain | |
| 28 of August | Moisés | Saint Moisés Etíope | Egypt | Egypt |
| 29 of August | Mederico | Saint Mederico of Autun | France | |
| 29 of August | María | Blessed Mary of the Cross Jugan | 1879 France | |
| 30 of August | María | Blessed Maria Rafols | 1781 Spain | 1853 Spain |
| 3 of September | Macanisio | Saint Macanisio of Irlanda | 514 Ireland | |
| 3 of September | Mansueto | Saint Mansueto of Toul | France | |
| 3 of September | Marino | Saint Marino of Titano | Italy |