Holy right-believing Emperor Marcian and Empress Pulcheria, who convened the Fourth Ecumenical Council.
St. Pulcheria, daughter of the Emperor Arcadius, was proclaimed Augusta in her youth and guided the empire during the reign of her brother Theodosius II, living in virginity and piety. After his death she married the general Marcian, who ruled with her in chastity.
Together they convened the Fourth Ecumenical Council at Chalcedon in 451, which condemned the Monophysite heresy. Pulcheria built many churches of the Theotokos in Constantinople and reposed in 453.
Feast day
On the New Calendar, Marcian and Pulcheria is commemorated on February 17. Churches on the Old (Julian) Calendar keep the feast on March 2 (a day earlier in leap years) of the civil calendar.
Who celebrates a name day
People with these names keep their name day on this feast:
Markianos, Marcian, Pulcheria, Poulcheria
Also commemorated on February 17

Mariamne the Equal-to-the-Apostles
Apostle, Μαριάμνη
St. Mariamne, Equal-to-the-Apostles, sister of the Apostle Philip.
Theodore the Byzantine
Martyr, Θεόδωρος ο Βυζάντιος
New Martyr Theodore of Neochori in Constantinople, who suffered in Mytilene.
Hermogenes of Moscow
Hierarch, Ερμογένης Μόσχας
Hieromartyr Hermogenes, Patriarch of Moscow and All Russia.
Agathangelos of Florina
Martyr, Αγαθάγγελος ο εκ Φλωρίνης
New Martyr Agathangelos of Florina, shoemaker, who suffered in Bitola.
Name days: Agathangelos