September 1
editAaron; Adelphius of Metz; Aegydius; Aegydius of Castaneda; Aithala; Aithalas of Bet-Nuhadra; Saint Giles; Rabban Hormizd; Simeon Stylites;
September 2
editAbibus of Edessa; Acepsimas of Hnaita, Joseph of Bet-Katoba, and Aithalas of Bet-Nuhadra; Agnes; Agricolus; Clodia; Patriarch John IV of Constantinople;
September 3
editAbnodius; Pope Gregory I;
September 4
editAaron; Aedhan Amlonn McLugar; Agatho, Peter, John, Ammon, Ammonius and Rebecca; Agilus; Babylas of Antioch; Pope Boniface I; Cuthbert of Lindisfarne;
September 5
editAbdas of Susa; Abdias; Abidas; Acontus, Nonnus, Herculanus & Taurinus; Aganus; Audias of Hormizd-Ardashi; Elizabeth (Biblical person); Lorenzo Giustiniani; Pope Zachary;
September 6
editAbibus; Faustus, Abibus and Dionysius of Alexandria; Zechariah (Hebrew prophet);
September 8
editAdrianus; Isaac of Armenia; Nativity of the Blessed Virgin Mary; Pope Sergius I;
September 9
editAdrianus;
September 10
editAchilleus; Adeltrudis; Agabius of Novara; Agnellus of Pisa; Saint Aubert; Nicholas of Tolentino;
September 11
editAdelphius; Aemilianus of Vercelli; Agatho the Stylite; Our Lady of Coromoto; Paphnutius of Thebes;
September 12
editAgatho the Stylite; Victoria Fornari-Strata;
September 13
editAemilianus of Valence; Agatho the Silent; Agatahocles; Eulogius of Alexandria; John Chrysostom;
September 14
editAbraham and Onesimus of Kiev; Pope Cornelius; Feast of the Cross or Holy Cross Day; Mar Sawa the physician, Mar Bishoi, Mar Odisho, Mar Zaia, Mar Shaleeta and all Saints
September 15
editAbibo Joseph; Achard; Achatius; Adalbert of Echternach; Adalbert of Mettlach; Aicardus; Catherine of Genoa; Abibo Joseph;
September 16
editAbundius and Abundantius; Adalbero of Wurzburg; Adrianus; Afomya; Cyprian; Saint Ninian; Pope Victor III; Euphemia;
September 17
editAgathocleia; Hildegard of Bingen; Lambert of Maastricht;
September 19
editAcutius; Goeric of Metz; Goericus; Januarius; Theodore of Tarsus;
September 20
editAedh McOissen; Pope Agapetus I; Agapius; Saint Eustace; Pope Martin I;
September 21
editMatthew, Apostle and Evangelist;
September 22
editAcutius; Aedh McSenach; Pope Felix IV;
September 23
editAbundius; Adamnan McRonan; Adamnan of Iona; Aunan McRonan; Eunan McRonan; Pope Linus; Thecla;
September 24
editAbraham of Miroshsk; Thecla;
September 25
editAbadir and Iraja; Nicholas of Flue; Sergius of Radonezh;
September 26
editAdrianus; Antoine Daniel; Canadian Martyrs; Charles Garnier (missionary); Cosmas and Damian; Gabriel Lallemant; Isaac Jogues; Jean de Brébeuf; Jean de Lalande; John the Apostle; Noël Chabanel; René Goupil;
September 27
editAbsadi; Adulph & John; Cosmas and Damian;
September 28
editAaron of Auxerre; Achatius the New Martyr; Adalrai of Einsiedeln; Adelphius, Alexander & Zosimus; Eustochium; Wenceslaus I, Duke of Bohemia;
September 29
editGabriel; Michael (archangel); Raphael (archangel); Michael and All Angels;
September 30
editGregory the Illuminator; Saint Honorius; Jerome; Otto of Bamberg; Ursus of Solothurn;