| Celebration | Name | Saint | Birth | Death |
|---|---|---|---|---|
| 14 of May | Carthage | Saint Carthage of Lismore | 555 Ireland | 638 Ireland |
| 15 of May | Caleb | Saint Caleb | 535 Ethiopia | |
| 16 of May | Carantoc | Saint Carantoc | United kingdom | |
| 18 of May | Claudia | Saint Claudia, virgin and martyr | 303 Turkey | |
| 19 of May | Crispin | Saint Crispin of Viterbo | Italy | 1750 Italy |
| 20 of May | Columba | Blessed Columba of Perugia | 1501 Italy | |
| 21 of May | Cristóbal | Saint Christopher Magallanes and companions | 1869 Mexico | 1927 Mexico |
| 25 of May | Canius | Saint Canius of Atella | Italy | |
| 28 of May | Caraunus | Saint Caraunus of Chartres | France | |
| 1 of June | Caprasius | Saint Caprasius of Lérins | 430 France | |
| 3 of June | Carlos | Saint Charles Lwanga and companions | 1865 Uganda | 1886 Uganda |
| 3 of June | Cecilius | Saint Cecilius of Carthage | Tunisia | |
| 3 of June | Clotilde | Saint Clotilde | 545 France | |
| 3 of June | Conus | Saint Conus of Lucania | Italy | |
| 6 of June | Ceratius | Saint Ceratius | 400 | France |
| 6 of June | Claudius | Saint Claudius of Condat | 703 France | |
| 6 of June | Colman | Saint Colman | 1010 United kingdom | |
| 7 of June | Colman | Saint Colman of Dromore | Ireland | Ireland |
| 8 of June | Calíopa | Saint Calíopa mártir | ||
| 8 of June | Clodulf | Saint Clodulf | 660 France | |
| 9 of June | Columba | Saint Columba of Iona | 521 Ireland | 597 United kingdom |
| 10 of June | Censurius | Saint Censurius of Auxerre | France | |
| 12 of June | Casimiro | Blessed Casimir Grelewski | 1907 Poland | 1942 Germany |
| 12 of June | Città | Blessed Florida Cevoli | 1685 Italy | 1767 Italy |
| 13 of June | Cetteus | Saint Cetteus of Amiterno | Italy | |
| 16 of June | Cecardo | Blessed Cecardo of Carrara | 860 Italy | |
| 18 of June | Calógero | Saint Calogero Anchorite | Turkey | 486 Italy |
| 18 of June | Cyriacus | Saint Cyriacus martyr | ||
| 22 of June | Consorcia | Saint Consorcia vírgen | ||
| 27 of June | Cyril | Saint Cyril of Alexandria | 376 Egypt | 444 Egypt |
| 29 of June | Cassius | Saint Cassius | 558 Italy | |
| 1 of July | Carileph | Saint Carileph of Anille | France | |
| 2 of July | Crescenciano | Saint Cresceniano mártir | 285 Italy | |
| 4 of July | Catalina | Blessed Catherine Jarrige | 1836 France | |
| 4 of July | Cesidio | Saint Cesidio Giacomantonio | 1900 China | |
| 5 of July | Ciprila | Saint Ciprila of Cirene | Libyan arab jamahiriya | |
| 6 of July | Ciriaca | Saint Ciriaca of Nicomedia | Turkey | |
| 8 of July | Coloman | Saint Coloman of Turingia | 689 Germany | |
| 10 of July | Cristóbal | Saint Christopher of Lycia | Israel | 251 Turkey |
| 11 of July | Cindeus | Saint Cindeus of Pamphylia | ||
| 11 of July | Cyprian | Saint Cyprian of Brescia | Italy | |
| 12 of July | Clemente | Saint Clement Ignatius Delgado Cebrián | 1761 Spain | 1838 Viet nam |
| 13 of July | Clelia | Saint Clelia Barbieri | 1870 Italy | |
| 14 of July | Camilo | Saint Camille de Lelis | 1550 Italy | 1614 Italy |
| 15 of July | Catulinus | Saint Catulinus and companions | 303 | |
| 15 of July | Ceslas | Blessed Ceslas of Krakow | 1180 | 1242 Poland |
| 16 of July | Carmen | Our Lady of Carmel | ||
| 17 of July | Colman | Saint Colman of Ireland | Ireland | 1012 Austria |
| 22 of July | Cyril | Saint Cyril of Antioch | 306 Syrian arab republic | |
| 23 of July | Cristino | Blessed Krystyn Gondek | Poland | 1942 Germany |
| 24 of July | Cristina | Saint Christina of Bolsena | Italy | 300 Italy |
| 24 of July | Charbel | Saint Charbel Makhluf | 1898 Lebanon | |
| 24 of July | Cristina | Blessed Christina Admirable | 1224 Netherlands | |
| 24 of July | Cunegunda | Saint Cunegunda of Hungría | 1293 | |
| 25 of July | Carmen | Saint Carmen Sallés | 1848 Spain | 1911 Spain |
| 26 of July | Camila | Blessed Camilla Gentili | Italy | |
| 27 of July | Cucufate | Saint Cucuphas | 270 Tunisia | 304 Spain |
| 27 of July | Celestine | Saint Celestine I pope | 432 Italy | |
| 28 of July | Camelian | Saint Camelian of Troyes | France | |
| 29 of July | Callinicus | Saint Callinicus of Gangra | Turkey | |
| 29 of July | Carlos | Blessed Charles Nicholas Antoine Ancel | 1794 France | |
| 31 of July | Calimerius | Saint Calimerius of Milan | Italy | |
| 2 of August | Centolla | Saint Centolla mártir | Spain | |
| 4 of August | Cecilia | Blessed Cecilia of Bolonia | 1290 Italy | |
| 5 of August | Cassian | Saint Cassian of Autun | France | |
| 6 of August | Claudia | Saint Claudia matrona | Italy | |
| 6 of August | Carlos | Blessed Carlos Lopez Vidal | 1936 Spain | |
| 7 of August | Cayetano | Saint Cajetan of Thiene | 1480 Italy | 1547 Italy |
| 9 of August | Cándida | Blessed Candida Maria of Jesus Cipitria | 1845 Spain | 1912 Spain |
| 9 of August | Claudio | Blessed Claude Richard | 1794 France | |
| 11 of August | Clara | Saint Clare of Assisi | 1194 Italy | 1253 Italy |
| 11 of August | Cassian | Saint Cassian of Benevento | Italy | |
| 12 of August | Carlos | Blessed Karl Leisner | 1915 Germany | 1945 Germany |
| 13 of August | Cassian | Saint Cassian of Imola | Italy | |
| 17 of August | Clara | Saint Clara of la Cruz | 1308 Italy | |
| 19 of August | Calminius | Saint Calminius | ||
| 20 of August | Christopher | Saint Christopher of Córdoba | 852 Spain | |
| 21 of August | Ciriaca | Saint Ciriaca of Roma | Italy | |
| 23 of August | Claudius | Saint Claudius of Egea | 303 Turkey | |
| 23 of August | Cyriacus | Saint Cyriacus of Ostia | Italy | |
| 26 of August | Ceferino | Blessed Ceferino Namuncurá | 1886 Argentina | 1905 Italy |
| 27 of August | Carlos | Blessed Charles Rene Collas du Bignon | 1743 France | 1794 France |
| 27 of August | Caesarius | Saint Caesarius of Arles | 542 France | |
| 28 of August | Carlos | Blessed Charles Arnold Hanus | 1794 France | |
| 29 of August | Constantino | Blessed Constantino Fernández Álvarez | 1907 Spain | 1936 Spain |
| 1 of September | Constanctius | Saint Constantius of Aquino | 570 Italy | |
| 1 of September | Cristino | Blessed Cristino Roca Huguet and companions | 1899 Spain | 1936 Spain |
| 3 of September | Chrodegang | Saint Chrodegang of Sées | France | |
| 4 of September | Caletric | Saint Caletric of Chartres | 573 France | |
| 4 of September | Catalina | Blessed Catalina Mattei | 1547 Italy | |
| 6 of September | Cagnoald | Saint Cagnoald of Laon | 632 France | |
| 7 of September | Clodoald | Saint Clodoald | 560 France | |
| 7 of September | Carísima | Saint Carísima of Albi | France | |
| 8 of September | Corbinian | Saint Corbinian of Freising | 670 France | 730 Germany |
| 12 of September | Coronatus | Saint Coronatus bishop | ||
| 13 of September | Claudio | Blessed Claude Dumonet | 1794 Italy | |
| 14 of September | Cruz | The Exaltation of the Holy Cross | ||
| 14 of September | Cyprian | Saint Cyprian of Carthage | 258 | |
| 14 of September | Claudio | Blessed Claude Laplace | 1794 France | |
| 15 of September | Camilo | Blessed Camilo Costanzo | 1622 Japan |
