Template:August 21
Afterfeast of the Dormition; Apostle Thaddeus of the Seventy; Martyr Bassa of Edessa and her sons Theogonius, Agapius, and Pistus; Saint Abramius, Archimandrite, Wonder-worker of Smolensk, and his disciple Saint Ephraim; Saint Abramius the Lover-of-labor of the Kiev Caves; Saint Theocleta the Wonder-worker of Asia Minor; Saint Cornelius, Abbot of Paleostrov and Olonets, and his disciple Saint Abramius; Saint Isaiah of Mount Athos; Saint Sarmean, the Katholikos of Qartli, Georgia; New-Martyr Simeon of Samokov; Hieromartyr Raphael of Serbia; Saint Avitos, Bishop of Clermont; Saint Sidonios Apollinaris, Bishop of Clermont; opening of the relics of Saint Nektarios of Aegina