thumb|The [[Eastern Orthodox Church|Eastern Orthodox cross]]
September 13 - Eastern Orthodox liturgical calendar - September 15
All fixed commemorations below celebrated on September 27 by Orthodox Churches on the Old Calendar.
For September 14th, Orthodox Churches on the Old Calendar commemorate the Saints listed on September 1.
Feasts
- The Universal Exaltation of the Precious and Life-giving Cross.
Saints
- Martyr Papas of Lycaonia (305) <small>(see also: March 16)</small>
- Martyr Theocles, by the sword.
- Child-martyr Valerianus, by the sword.
- Saint Placilla the Empress (Aelia Flaccilla), wife of St. Theodosius the Great (400)
- Saint Maria of Tarsus (607)
Pre-Schism Western saints
- Saints Caerealis and Sallustia, martyred in Rome (251)