January 30 in Eastern Orthodox liturgical calendars is a feast day and a day of commemoration of saints and martyrs. Although some Orthodox churches use the Revised Julian Calendar and others use the traditional Julian calendar, the fixed commemorations for their respective January 30 are broadly the same, no matter which calendar is used.
Synaxis of the Three Holy Hierarchs:
Saint Basil the Great, Saint Gregory the Theologian, and Saint John Chrysostom.
Hieromartyr Hippolytus, priest, of Antioch, martyred in the period of the heretical Novatianists.
Hieromartyr Hippolytus of Rome, Bishop of Rome, and those with him:
Martyrs Censorinus, Sabinus, Ares (Aares), the virgin Chryse (Chryse of Rome), Felix, Maximus, Herculianus, Venerius, Styracius, Mennas, Commodus, Hermes, Maurus, Eusebius, Rusticus, Monagrius, Amandinus, Olympius, Cyprus, Theodore the Tribune, the priest Maximus, the deacon Archelaus, and the bishop Cyriacus, at Ostia, – under Roman Emperor Claudius Gothicus and a vicarius named Ulpius Romulus (269) (see also August 13 - Hippolytus of Rome - who may or may not be the same individual)
Venerable Zeno the Hermit, of Antioch (414), disciple of St. Basil the Great.
Martyr Theophilus the New, in Cyprus (784)
Venerable Kyriakos, ascetic of the Great Lavra of St. Sabbas the Sanctified (7th-8th centuries)
Saint Peter I of Bulgaria, King of Bulgaria (969)
Saint Matthias of Jerusalem, bishops of Jerusalem, confessor (120)
Saint Martina of Rome, a martyr in Rome under Alexander Severus (228)
Saint Savina of Milan (Sabina), born in Milan, she ministered to martyrs in prison and buried their bodies during the persecution of Diocletian (311)
Saint Armentarius of Antibes, first Bishop of Antibes in Provence in France (ca. 451)
Martyrs Felician, Philippian and Companions, a group of one hundred and twenty-six martyrs in North Africa.
Saint Tudy (Tudclyd, Tybie), a virgin in Wales; St Tybie's church in Llandybie in Dyfed is named after her (5th century)
Saint Adelgonda (Adelgunda), foundress of Maubeuge Abbey (680)
Saint Balthildes (Bathilda), Queen of France (680)