Holy Martyr Zoilos of Rome.
Zoilos is commemorated in the Greek synaxaria as a martyr of Rome who gave his life for Christ. Little has been preserved of his story beyond his name and his witness.
He is one of the many martyrs of the early Church whose memory survives in the calendar alone.
Feast day
On the New Calendar, Zoilos the Roman is commemorated on April 13. Churches on the Old (Julian) Calendar keep the feast on April 26 of the civil calendar.
Also commemorated on April 13

Quintilian, Maximus and Dadas
Martyr, Κυντιλιανός, Μάξιμος και Δάδας
Holy Martyrs Quintilian, Maximus the Reader and Dadas, beheaded near Dorostolum.
Arsenios of Elassona
Hierarch, Αρσένιος Ελασσώνος
Saint Arsenios, Archbishop of Elassona and later Archbishop of Suzdal in Russia.