1st October
- Kalends of October
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3rd October
- St. Aldagott of Chur
- St. Candidus of Rome
- St. Cyprian of Toulon
- Ss. Dionysius, Faustus, Caius, Peter, Paul and Companions
- St. Domenic Spadafora
- St. Ebontius of Barbasto
- Ss. Ewald the Fair and Ewald the Dark
- St. Frolian of Leon
- St. Gerard of Brogne (alt)
- St. Hesychius of Gaza
- St. Maximian of Numidia
- St. Menna of Lorraine
- St. Utto of Metten
- St. Widradus of Salieu
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4th October
- Ss. Auductua and Callisthene
- St. Ammon the Great
- St. Aurea of Paris
- Ss. Caius, Faustus, Eusebius, Lucius and Companions
- Ss. Crispus and Caius
- Ss. Domnina, Berenice and Prosdoce
- St. Francis of Assisi
- St. Francis Titelmans
- St. Hierotheus of Athens
- St. Julian Majali
- Ss. Mark, Marcian and Companions
- St. Peter of Damascus
- St. Petronius of Bologna
- St. Quintus of Tours
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5th October
- St. Alexander of Treves
- St. Apollinaris of Valence
- St. Attilanus of Zamora
- St. Aurea of Amiens
- St. Aymard of Cluny
- St. Charitina
- St. Felicia Meda
- Ss. Firmatus and Flaviana
- St. Galla of Rome
- Ss. John Hewitt, William Hartly and Robert Sutton
- St. Magdalveus of Verdun
- St. Marcellinius of Ravenna
- St. Meinulf of Bodeken
- Ss. Palmatius and Companions
- Ss. Placid, Eutychius, Victorinus, Flavia, Donatus, Firmatus, Faustus and Companions
- St. Raymond of Capua
- St. Sanctes of Cori
- St. Thaseas of Eumenia
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7th October
- Nones of October
- St. Mark
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8th October
- Ss. Palatias and Laurentia
- St. Pelagia
- St. Peter of Seville
- St. Reparata of Palestine
- St. Simeon Senex
- St. Thias of Alexandria
- St. Triduana
- St. Ywi of Lindisfarne
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9th October
- St. Aaron of Cracoa
- St. Abraham
- St. Alfanus of Salerno
- Ss. Andronicus and Athanasia
- St. Demetrius of Alexandria
- St. Denis
- St. Deusdedit of Monte Cassino
- St. Dionesyius the Arepagite
- Ss. Dionysius, Rusticus and Elutherius
- St. Domninus of Parma
- St. Geminus of Sanpaterniano
- St. Gislenus of St. Ghislain
- St. Goswin of Anchin
- St. Gunther of Niederalltaich
- Ss. Lambert and Valerius
- St. Louis Bertran
- St. Publia of Antioch
- St. Savinus of Lavedan
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10th October
- St. Aldericus of Sens
- Ss. Cassius, Florentius and Companions
- St. Cerbonius of Piombino
- St. Cerbonius of Verona
- St. Clarus of Nantes
- Ss. Daniel, Samuel, Angelus, Domnus, Leo, Nicholas, and Hugolinus
- Ss. Eulampius, Eulampa, and Companions
- St. Francis Borgia
- St. Fulk of Fontenelle
- St. Gundislavas of Las Junias
- St. Hugh of Macon
- St. Maharsapor of Persia
- St. Patrician of Persia
- St. Paulinus of Capua
- St. Paulinus of York
- St. Pinytus of Crete
- St. Tranca of Troyes
- St. Victor and Companions
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11th October
- Feast of the Translation of St. Augistinius
- St. Agibert of Paris
- St. Alexander Sauli
- Ss. Anastasius, Placid, Genesius and Companions
- St. Ansilio of Lagny
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13th October
- St. Theophilius of Antioch
- St. Venantius of Tours
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14th October
- St. Angadresima of Beauvais
- St. Bernard of Arce
- St. Burchard of Wurzburg
- St. Callistus I
- Ss. Carponius, Evaristus, and Priscian
- St. Domenic Loricatus
- St. Donatian of Reims
- St. Fortunata of Caesaria
- St. Fortunatus of Todi
- St. Gaudentius of Rimini
- St. Manakus of Wales
- St. Maneheldis of Champagne
- St. Rusticus of Treves
- Ss. Saturnius and Lupus
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15th October
- Ides of October
- The Feast of the Martyrs of Germany
- St. Agelius of Carthage
- St. Antioch of Lyons
- St. Aurelia of Strassburg
- St. Callistus of Huesca
- St. Cannatus of Marseilles
- St. Donatianus
- St. Euthymius the Thessalonian
- St. Leonard of Vandoeuvre
- St. Odilo of Stavelot
- St. Sabinus of Catania
- St. Severus of Treves
- St. Thecia of Avila
- St. Thecla of Kitzingen
- St. Willa of Nonnberg
- St. Wulfranus
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16th October
- St. Ambrose of Cahors
- St. Anastasius of Cluny
- St. Balderic of Montfaucon
- St. Baldwin of Laon
- St. Bercharius of Moutier-on-Der
- St. Bertrand of Comminges
- St. Balonia
- St. Conagen of Quimper
- St. Dulcidius of Agen
- St. Eliphius of Toul
- St. Erembeta of Wierre
- St. Florentinus of Treves
- St. Gall
- St. Geraldus of Clairvaux
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19th October
- St. Theofrid of Carmery
- St. Thomas Helye
- St. Varus of Upper Egypt
- St. Veranus of Cavilon
- Ss. Veronicus, Pelagia and Companions
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20th October
- St. Acca of Hexam
- St. Adelina of Moriton
- St. Aderald of Troyes
- St. Aidan of Mayo
- St. Andrew the Calabyte
- St. Artemiun
- St. Artemius
- St. Austroberta
- Ss. Barsabas and Companions
- St. Bernard of Bagneora
- Ss. Badan and Orara
- St. Caprasius of Agen
- St. Irene of Santarem
- St. John Cantius
- Ss. Martha, Saula and Companions
- St. Maximus of Aquila
- St. Sindulphus of Reims
- St. Vitalis of Salzburg
- St. Willaim of Savigny
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21st October
- Feast of the Ordination of St. Dunstanus
- Feast of the Eleven Thousand Virgins
- St. Agatho of Egypt
- St. Asterius of Ostia
- St. Berthold of Parma
- St. Cilinia of Laon
- St. Condedus of Fontanelle
- Ss. Dasius, Zoticus, Caius and Companions
- St. Finian of Taghmon
- St. Gebizo of Monte Cassino
- St. Gundislavas of Lagos
- St. Hilarion of Gaza
- St. Hugh of Ambronay
- St. Imana of Loss
- St. Malchus of Chalcis
- St. Marontus of Marsellies
- St. Peter Capucci
- St. Tuda of Lindisfarne
- Ss. Ursula and Companions
- St. Viator of Lyons
- St. Wendelinus
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