July 27 - Eastern Orthodox Church calendar - July 29

All fixed commemorations below are celebrated on August 10 by Old Calendar.^{[note 1]}

For July 28th, Orthodox Churches on the Old Calendar commemorate the Saints listed on July 15.

• Holy Apostles of the Seventy and Deacons (1st century):^{[1][2][3][4][5][note 2]}

• Prochorus, Nicanor, Timon, and Parmenas.

• Martyr Julian of Dalmatia (c. 138-161)^[1][6][7][8]
• Martyr Eustathius the Soldier, of Ancyra (c. 316)^{[1][3][5][9][10][note 3]}
• Martyr Acacius of Miletus (c. 321)^{[1][3][5][12][13][note 4]}
• Martyr Drosis (Drosida, Drosa), by being cast into a golden crucible.^{[3][5][14][15][note 5]} (see also: March 22)
• Martyr Auxentios, of Laodicea in Phrygia.^[15][16]
• Venerable Irene Chrysovolantou of Cappadocia, Abbess of Chrysovalantou (912)^{[1][3][5][6][17][18][19][note 6][note 7][note 8]}
• Venerable Paul of Xeropotamou, on Mount Athos (820 or 996)^{[1][3][5][6][8][21][22]}
• Saint George the Builder, of Iveron, Mt. Athos (1029 or 1033)^[1][6][23]

• Martyrs Nazarius and Celsus, martyrs in Milan in Italy under Nero (c. 68)^{[24][25][note 9]} (see also: October 14)
• Saint Victor I, born in North Africa, he was Pope of Rome for ten years from 189-198 (198)^{[24][26][note 10]}
• Saint Peregrinus, a priest near Lyons in France at the time of St Irenaeus and during the persecution under Severus (2nd century)^{[24][note 11][note 12]}
• Saint Camelian, successor of St Lupus as Bishop of Troyes in France from 478 (c. 525)^[24]
• Saints Ursus and Leobatius (Leubais), Brother-Abbots, of Gaul (c. 500)^[1][6] (see also: July 30)
• Saint Samson of Dol, Bishop of Dol, in Brittany (c. 565)^{[1][5][6][24][27][28][29][note 13][note 14]}
• Saint Banthus of Trier, Bishop of Trier in Germany (7th century)^[30] (see also: July 25)^[31]
• Saint Arduinus (Ardwyne), patron-saint of Trepino in the south of Italy (7th century)^{[24][27][note 15][note 16]}
• Saint Lucidus of Aquara, a monk of St Peter's near Aquara, in the south of Italy (c. 938)^{[24][note 17]}
• Saint Lyutius, a monk at Montecassino who died as a hermit at La Cava Abbey in Italy (c. 1038)^[24]

• Venerable Moses of the Kiev Caves, Wonderworker (13th-14th centuries)^{[1][5][6][8][15][32][note 18]}
• Saint Anthony, Bishop of Rostov, Yaroslavl, and Belozersk (1336)^[1]
• New Martyr David of Aleppo (1660)^[1]
• Saint Pitirim, Bishop of Tambov (1698)^{[5][6][8][33][34][note 19]}
• New Martyr Christodoulos of Kassandreia (1777)^{[3][5][6][35]}

• Consecration the Temple of the Most Holy Theotokos in the Quarter of Deaconess.^[5][15][43]
• Synaxis of the Saints of Tambov (1988)^{[1][6][44][note 21]}
• Repose of Abbess Daria of Sezenovo Convent (1858)^{[1][note 22]}
• Translation of the relics of Saint Jacob the New Chozebite (1960)^[45] (see also: August 5)

• St. John the Evangelist with Prochorus.
• St. Nicanor the Deacon.
• Venerable Irene Chrysovolantou of Cappadocia.
• Venerable Paul of Xeropotamou, on Mount Athos.
• Martyr Nazarius.
• St. Samson of Dol, Bishop of Dol, in Brittany.
• Venerable Moses the Wonderworker of the Kiev Caves.
• Saint Pitirim, Bishop of Tambov.
• New Hieromartyr Ignatius (Bazyluk).
• Smolensk Icon of the Mother of God (Dionisius the Wise, 1482).