September 21 (Eastern Orthodox liturgics)

Sep. 20 - Eastern Orthodox Church 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.

Prophet Jonah.

Apostle Quadratus of the Seventy.

Martyr Priscus of Phrygia.

Venerables Isaac and Meletius of Cyprus.

New Hieromartyr Platon (Aivazidis) of Amasya.

St. Demetrius of Rostov.

Abp. Arseny (Chagovstsov) of Winnipeg.

Priest Dumitru Staniloae.

Greek Sources

Russian Sources

...
Wikipedia