Hieromartyrs Diodoros the Presbyter and Marianos the Deacon.
Sts. Diodoros the presbyter and Marianos the deacon are martyrs of the early Church commemorated together in the Greek synaxaria on March 19. Tradition relates that they were shut up in a cave and died there for their confession of Christ.
The Church keeps their memory on this day.
Feast day
On the New Calendar, Diodoros and Marianos is commemorated on March 19. Churches on the Old (Julian) Calendar keep the feast on April 1 of the civil calendar.
Also commemorated on March 19

Chrysanthos and Daria
Martyr, Χρύσανθος
Holy Martyrs Chrysanthos and Daria.
Name days: Chrysanthos, Hrysanthos, Daria, Chrysanthi
Claudius and Hilaria
Martyr, Κλαύδιος και Ιλαρία
Holy Martyrs Claudius the Tribune, his wife Hilaria and their sons Jason and Maurus.
Innocent of Komel
Venerable, Ιννοκέντιος
Venerable Innocent of Komel and Vologda, disciple of Saint Nilus of Sora.