August 21 (Eastern Orthodox liturgics)
August 20 - Eastern Orthodox liturgical calendar - August 22
Holy Forefathers Abraham, Isaac, and Jacob.
Apostle Thaddeus of Edessa.
Stained-glass windows at Clermont-Ferrand cathedral, with Saint Sidonius Apollinaris.
Saint Nectarius (Kephalas), Metropolitan of Pentapolis (North Africa).
August 20 (Eastern Orthodox liturgics)
August 19 – Eastern Orthodox liturgical calendar – August 21
Prophet Samuel.
Martyr Oswine of Deira, King of Deira and Passion Bearer.
St. Stephen I of Hungary, King of Hungary.
New Martyr Theocharis of Neapolis, Cappadocia.