| Date | Saints and feasts | Name days |
|---|
| May 1 | Jeremiah the Prophet, Akakios, Euthymios and Ignatios the New Martyrs of Athos, Isidora the Fool-for-Christ, Tamara the Queen of Georgia and 3 more | Ieremias, Jeremy, Jerry, Akakios, Acacius, Efthymios, Efthimios, Euthymius, Ignatios, Ignatius and 10 more |
| May 2 | Athanasios of Alexandria, Hesperos and Zoe with their sons Kyriakos and Theodoulos, Matrona of Moscow, Boris the Baptizer of Bulgaria and 2 more | Athanasios, Thanassis, Thanos, Nasis, Athanasius, Hesperos, Esperos, Theodoulos, Theodulus, Zoe and 7 more |
| May 3 | Timothy and Maura, Peter of Argos, Xenia of Kalamata, Theodosius of the Kiev Caves and 3 more | Timotheos, Tim, Timothy, Mavra, Maura, Mavre, Petros, Peter, Xenia, Ksenia and 11 more |
| May 4 | Pelagia, Nikephoros of Mount Athos, Monica, Mother of Augustine, Aphrodisios and Companions and 3 more | Pelagia, Pelayia, Pela, Nikiforos, Nikephoros, Nicephorus, Monica, Monika, Monique, Aphrodisios and 6 more |
| May 5 | Irene the Great Martyr, Ephraim of Nea Makri, Euthymios of Madytos, Irenaeus, Irene and Peregrinus of Thessalonica and 2 more | Eirini, Irini, Irene, Rena, Reni, Efraim, Ephraim, Efrem, Ephrem, Irenaios and 6 more |
| May 6 | Job the Long-Suffering, Seraphim of Dombou, Sophia of Kleisoura, Barbaros the Soldier and 2 more | Iov, Job, Serafeim, Seraphim, Serafim, Varvaros, Benedicta, Benedikti |
| May 7 | Akakios of Cappadocia, Sign of the Cross over Jerusalem, Kodratos and Companions, Nilus the Myrrhstreamer and 3 more | Akakios, Acacius, Kodratos, Quadratus, Neilos, Nilos, Nilus |
| May 8 | John the Theologian, Arsenios the Great, Augustina the Martyr, Arsenios of Varnakova and 2 more | Ioannis, Giannis, Yiannis, Yannis, John, Arsenios, Arsenis, Arsenius, Arsenia, Augustina and 1 more |
| May 9 | Isaiah the Prophet, Christopher the Great Martyr, Nicholas of Vounena, Hieronymos of Simonopetra and 3 more | Esaias, Isaiah, Christophoros, Christoforos, Christopher, Christoph, Christofer, Kristofer, Ieronymos, Hieronymus and 8 more |
| May 10 | Simon the Zealot, Alphaeus, Philadelphus and Cyprinus, Hesychios of Antioch, Erasmus and Onesimus with Fourteen Martyrs and 2 more | Simon, Simeon, Alphaios, Alpheios, Philadelphos, Hesychios, Isychios, Hesychius, Erasmos, Erasmus and 3 more |
| May 11 | Mocius the Martyr, Cyril and Methodios, Enlighteners of the Slavs, Founding of Constantinople, Argyrios of Epanomi and 2 more | Mokios, Mocius, Kyrillos, Kirillos, Cyril, Kyril, Methodios, Methodius, Argyrios, Argyris and 4 more |
| May 12 | Modestos, Epiphanios of Cyprus, Germanos of Constantinople, Theodore of Kythera and 3 more | Modestos, Modestus, Epiphanios, Epifanios, Epiphanius, Germanos, Germanus, Pankratios, Pancratius, Ermogenis and 1 more |
| May 13 | Glykeria, Sergios the Confessor, Founders of Iviron: John, Euthymios, George and Gabriel, Laodikios the Jailer and 2 more | Glyceria, Glyceri, Glykeria, Glikeria, Sergios, Sergius, Laodikios, Pafsikakos, Pausicacus |
| May 14 | Isidore of Chios, Therapon of Cyprus, Leontios of Jerusalem, Mark of Crete and 2 more | Isidoros, Isidore, Therapon, Therapontas, Leontios, Leontius, Aristotelis, Aristotle, Leandros, Leander |
| May 15 | Pachomios the Great, Achillios of Larisa, Barbaros the Myrrhstreamer, Andrew the Hermit and 3 more | Pachomios, Achillios, Achilleas, Achilles, Achillefs, Achileas, Varvaros, Kali, Kale, Silvanos and 2 more |
| May 16 | Theodore the Sanctified, Alexander of Jerusalem, Nicholas Mystikos, Monastic Martyrs of Saint Sabbas Lavra and 3 more | Theodoros, Theodoris, Theodore, Makarios, Macarius, Vukasin |
| May 17 | Andronikos the Apostle, Junia the Apostle, Athanasios of Christianoupolis, Solochon, Pamphamer and Pamphylon and 3 more | Andronikos, Junia, Iounia, Solochon, Theodoritos, Theodoret |
| May 18 | Theodotus of Ancyra, Martyrs of Lampsacus: Peter, Dionysios, Andrew, Paul and Christina, Seven Virgin Martyrs of Ancyra, Stephen of Constantinople and 3 more | Theodotos, Theodotus, Tekousa, Faini, Phaine, Julia, Ioulia, Iulia, Julie, Giulia and 1 more |
| May 19 | Patrick, Bishop of Prusa, Memnon the Wonderworker, Theotime the Martyr, Kyriaki the Martyr and 2 more | Patrick, Patrikios, Memnon, Theotimi, Theotime |
| May 20 | Lydia of Philippi, Thalleleos the Unmercenary, Founders of Nea Moni: Niketas, John and Joseph, Thalassios the Libyan and 3 more | Lydia, Lidia, Thalelaios, Thalleleos, Thaleleos, Thallelaeus, Thalassios, Asterios, Asterius |
| May 21 | Constantine and Helen, Pachomios the New Martyr, Kassianos the Greek, Constantine of Murom with his sons Michael and Theodore and 2 more | Konstantinos, Kostas, Kostis, Dinos, Konstandinos, Constantine, Costas, Costa, Gus, Konstantin and 20 more |
| May 22 | Basiliskos, Fathers of the Second Ecumenical Council, Paul the Peloponnesian, Sophia the Physician and 3 more | Basiliskos, Vasiliskos, Markellos, Marcellus |
| May 23 | Michael the Confessor, Mary of Clopas, Eumenios of Crete, Joachim of Ithaca and 3 more | Michail, Michalis, Michales, Mike, Mikes, Miguel, Michele, Michael, Evmenios, Eumenios |
| May 24 | Symeon Stylites, Kyriakos of Evrychou, Meletios the General and Companions, Niketas the Stylite of Pereslavl and 1 more | Simeon, Agatharchos |
| May 25 | Third Finding of the Head of John the Baptist, Celestine the Martyr, Olbianos the Venerable, Dionysios of Milan and 2 more | Ioannis, Giannis, John, Innokentios, Innocent, Zinovios, Zenobius |
| May 26 | Karpos the Apostle, Alphaeus the Apostle, Alexander the Dervish, Synesios of Karpasia and 3 more | Karpos, Alfaios, Alphaeus, Synesios, Synesius |
| May 27 | John the Russian, Therapon of Sardis, Alypios the Martyr, Julius the Veteran and 2 more | John, Ioannis, Yiannis, Therapon, Therapontas, Alypios, Alypius, Ioulios, Julius |
| May 28 | Helladios, Eutyches of Melitene, Heliconis of Thessalonica, Andrew the Fool-for-Christ and 3 more | Helladios, Elladios, Eftychis, Eutyches, Elikonida, Heliconis |
| May 29 | Theodosia of Constantinople, Theodosia of Tyre, Alexander of Alexandria, Hypomone the Righteous and 3 more | Theodosia, Dosia, Ypomoni, Hypomone, Ipomoni, Ypomeni |
| May 30 | Isaac the Syrian, Emmelia, Mother of Basil the Great, Barlaam the Venerable, Natalios the Martyr and 2 more | Isaak, Isaac, Emmelia, Emmeleia, Aimilia, Emilia, Emily, Emilie, Varlaam, Barlaam |
| May 31 | Hermias the Martyr, Eusebios and Charalambos, Eustathios of Constantinople, Petronilla of Rome and 3 more | Hermias, Ermis, Petronilla |
