| Date | Saints and feasts | Name days |
|---|
| January 1 | Basil the Great, Circumcision of the Lord, Gregory of Nazianzus the Elder, Theodotos the Martyr and 2 more | Vasilis, Vasileios, Vassilis, Vasile, Basil, Bill, Vasilios, Vassilios, Vasos, Vasily and 13 more |
| January 2 | Seraphim of Sarov, Sylvester of Rome, Theagenes of Parium, Theodote the Mother of the Unmercenaries and 3 more | Serafim, Serafeim, Seraphim, Sylvester, Silvester, Silvestros, Sylvestros, Theagenes, Theagenis, Theodote and 2 more |
| January 3 | Gordios, Malachi the Prophet, Thomais of Lesbos, Genevieve of Paris and 3 more | Gordios, Gordius, Malachi, Malachias, Malachy, Thomais, Thomai, Genevieve, Genoveva, Genovefa |
| January 4 | Anastasia, Synaxis of the Seventy Apostles, Apollinaria the Senator's Daughter, Nikephoros the Leper and 3 more | Anastasia, Nastia, Natasha, Stacy, Apollinaria, Theoktistos, Theoctistus |
| January 5 | Theopemptos, Synkletike of Alexandria, Theonas the Martyr, Romanos of Karpenisi and 3 more | Theopemptos, Synkletike, Synkletiki, Syncletica, Sygklitiki, Theonas, Domnina |
| January 6 | Theophany, Romanos the Lacedaemonian, Theophan the Recluse | Theophanis, Theofanis, Phanos, Phanis, Theophanes, Fanis, Fotis, Fotios, Photios, Iordanis and 11 more |
| January 7 | John the Baptist, Athanasios of Attaleia, Julian the Deacon of Aegina, Cedd of Lastingham | Ioannis, Giannis, Yiannis, Yannis, Yanni, Giovanni, John, Jean, Juan, Ivan and 13 more |
| January 8 | George the Chozebite, Domnika of Constantinople, Kyranna the New Martyr, Carterios of Caesarea and 3 more | Georgios, Giorgos, Yiorgos, George, Domnika, Domniki, Kyranna, Kyrana, Kyranne, Karterios and 3 more |
| January 9 | Polyeuktos, Eustratios the Wonderworker, Peter of Sebaste, Antonina of Nicomedia and 1 more | Polyeuktos, Polyefktos, Antonina |
| January 10 | Gregory of Nyssa, Dometian of Melitene, Markianos the Presbyter, Theosebia the Deaconess and 2 more | Grigorios, Grigoris, Gregory, Grzegorz, Theosebia, Theosevia |
| January 11 | Theodosius the Cenobiarch, Theodosios of Trebizond, Michael of Klops, Nikephoros of Crete and 2 more | Theodosios, Theodosius, Fedya, Ted, Parthena, Domnina, Neollina |
| January 12 | Tatiana, Mertios the Martyr, Euthasia the Martyr, Peter Apselamos and 3 more | Tatiane, Tatiani, Tanya, Tania, Tatiana, Euthasia, Efthasia, Eupraxia, Efpraxia, Evpraxia |
| January 13 | Hermylos, Stratonikos the Martyr, Maximos Kavsokalyvites, James of Nisibis and 3 more | Hermylos, Hermil, Stratonikos, Stratonicus |
| January 14 | Nina, Fathers slain at Sinai and Raithu, Sava of Serbia, Theodoulos son of Nilus and 2 more | Nina, Nino, Theodoulos, Theodulus |
| January 15 | Paul of Thebes, John the Kalyvites, Pansophios the Martyr, Gerasimos Palladas and 2 more | Pavlos, Paul, Pablo, Pavel |
| January 16 | Peter, Nikolaos of Mytilene, Speusippos, Eleusippos and Meleusippos, Danax the Reader and 2 more | Petros, Pietro, Pedro, Pyotr, Pete, Peter |
| January 17 | Anthony the Great, George of Ioannina, Anthony the New of Veria, Theodosios the Great and 2 more | Antonios, Antonis, Tony, Antonio, Anton, Antony, Anthony, Antonia, Tonia |
| January 18 | Athanasios the Great, Cyril of Alexandria, Theodoule the Martyr, Markianos of Cyrrhus and 1 more | Athanasios, Thanassis, Thanos, Nasis, Atanas, Athanasius, Thanasis, Thanasi, Athanasis, Athanasia and 9 more |
| January 19 | Makarios of Egypt, Makarios of Alexandria, Mark Eugenikos, Arsenios of Corfu and 2 more | Makarios, Makari, Makary, Macarius, Euphrasia, Efrasia, Evfrasia |
| January 20 | Euthymios the Great, Zacharias of Arta, Bassos, Eusebios, Eutychios and Basilides, Innas, Pinnas and Rimmas and 3 more | Efthimios, Efthimis, Euthymios, Efthymios, Efthymis, Thymios, Efthymia, Efthimia, Thymia, Effie |
| January 21 | Maximos the Confessor, Neophytos the Martyr, Agnes of Rome, Maximos the Greek and 3 more | Maximos, Makis, Max, Maksim, Maxim, Maximus, Neophytos, Neofytos, Neophyte, Neofitos and 10 more |
| January 22 | Timothy the Apostle, Anastasios the Persian, Martyrs of Bulgaria under Manuel and George, Joseph the Sanctified of Samaka and 1 more | Timotheos, Tim, Timos, Timothy, Anastasios, Anastasis, Anastasius, Tasos, Anastas |
| January 23 | Clement of Ankyra, Agathangelos the Martyr, Dionysios of Olympus, Acholios of Thessaloniki and 2 more | Klemes, Klement, Clement, Agathangelos, Agathangelus, Agathaggelos |
| January 24 | Xenia of Petersburg, Xenia of Rome, Neophytos the Recluse, Babylas of Sicily and 2 more | Xenia, Ksenia, Xenya, Xeni, Xene, Neophytos, Neofytos |
| January 25 | Gregory the Theologian, Auxentios the New Martyr, Publius the Ascetic, Kastinos of Byzantium and 3 more | Grigorios, Grigoris, Gregory, Greg, Grigoria |
| January 26 | Xenophon, Symeon the Ancient, Ammonas the Venerable, Clement of Sagmata and 3 more | Xenophon, Xenofon |
| January 27 | John Chrysostom, Markiane the Empress, Peter the Egyptian, Demetrios of Constantinople and 2 more | Ioannis, Giannis, Yiannis, Chrysostomos, John, Chrysostom |
| January 28 | Ephrem the Syrian, Palladios of Antioch, James the Ascetic, Charis the Martyr and 3 more | Efraim, Ephraim, Charis, Chara, Hara, Charikleia |
| January 29 | Ignatios the God-Bearer, Demetrios of Chios, Seven Martyrs of Samosata, Sarbelos and Bebaia and 3 more | Ignatios, Ignacio, Ignacy, Ignatius |
| January 30 | Hippolytos, Three Holy Hierarchs, Chryse the Martyr, Kensourinos and Sabinos and 4 more | Hippolytos, Hippolyte, Basil, Gregory, John, Vasilis, Grigoris, Giannis, Chryse, Chrysi and 2 more |
| January 31 | Cyrus and John, Athanasia and her Daughters, Arsenios of Paros, Victorinus, Victor and those with them and 2 more | Kyros, Kyriakos, Cyriacus, Tryphaina, Tryphena, Trifena, Tryphaena |
