September 21 (Eastern Orthodox liturgics)
Sep. 20 - Eastern Orthodox liturgical calendar - Sep. 22
All fixed commemorations below celebrated on October 4 by Orthodox Churches on the Old Calendar.
For September 21st, Orthodox Churches on the Old Calendar commemorate the Saints listed on September 8.
Feasts
Apodosis of the Exaltation of the Cross.Saints
Prophet Jonah Apostle Quadratus of the Seventy, Apologist- Martyr Eusebius of Phoenicia
- Holy Six Martyrs, by the sword
- Martyr Priscus of Phrygia.
- Martyrs Eusebius, Nestabus, Zeno, brothers, with Nestor and Busiris, of Gaza
- Martyr Bassa of Tyre.
- Hieromartyr Hypatius, Bishop of Ephesus, and his Presbyter Andrew
- Venerable Jonah the Sabbaite, the Presbiter, father of Sts. Theophanes the Hymnographer and Theodore Graptus
- Venerables Isaacius and Meletius, Bishops of Sitis in Cyprus.
Pre-Schism Western saints
- Saint Alexander, a bishop in the neighbourhood of Rome
- Saint Pamphilus, a martyr in Rome.
- Saint Mabyn, a Cornish saint
- Saint Gerulfus, a saint of Flanders
- Saint Maura, a holy virgin in Troyes, she reposed at the age of twenty-three after a life of prayer and good works
Post-Schism Orthodox saints
- Venerable Daniel, founder of Shuzhgorsk Monastery, Belozersk
- Saint Joseph, founder of Zaonikiev Monastery, Vologda
New martyrs and confessors
- New Hieromartyrs Alexander Fedoseyev, Alexis Stabnikov, Constantine Shirokinsky, and John Flerov, Priests
- New Hieromartyr Archimandrite Platon, Protosyncellus of Metropolitan Germanos Karavangelis of Amasya
- New Hieromartyr Theophan, Metropolitan of Lipetsk and Belorussia
- New Hieromartyr Maurice, Archimandrite, of Yuriev-Polsky, and with him Martyr Basil Kondratiev
- New Hieromartyrs Valentine Nikolsky, Alexander Belyakov, John Lazarev, Andrew Benedictov, Peter Sakharovsky, and John Nikolsky, Priests
- New Hieromartyr John Bystrov, Priest
- New Hieromartyr Basil Krymkin, Priest
Other commemorations
Uncovering of the relics of St. Demetrius, Metropolitan of Rostov- Repose of Arseny (Chagovstsov), Archbishop of Winnipeg
- Repose of Priest Dumitru Staniloae of Romania
- Synaxis of the Saints of Uglich.
- Synaxis of the Church of "Panagia Giatrissa", on Therasia in the Greek Cyclades