May 19 - Eastern Orthodox Church calendar - May 21

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All fixed commemorations below celebrated on June 2 by Orthodox Churches on the Old Calendar.^{[note 1]}

For May 20th, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 7.

• Saint Lydia of Thyatira (Lydia of Philippi), mentioned in Acts 16:14-15 (1st century)^{[1][note 2]}
• Martyrs Thalelaeus the Unmercenary, at Anazarbus in Cilicia, and his companions Alexander and Asterius (284)^{[2][3][note 3]}
• Martyr Asclas of the Thebaid, Egypt (287)^[4]
• Sts. Zabulon and Susanna, of Cappadocia and Jerusalem (parents of St. Nina (Nino), enlightener of Georgia), (4th century)^[5]
• Saint Mark the Hermit (Marcus Eremita) (5th century)^[6]
• Holy Martyrs of Mamilla, Jerusalem (614)^[7]
• Saint Thalassius the Myrrh-gusher, of Libya (648)^{[8][note 4]}
• Saints John, Joseph and Nicetas, monks of Nea Moni on Chios (c. 1050)^[10]

• Saint Plautilla the Roman, martyr, (67)^{[3][11][note 5]}
• Hieromartyr Baudelius, missionary in France and northern Spain, martyred in Nîmes (2nd or 3rd century)^[3][12]
• Virgin-martyr Basilla (304)^[3][13]
• Saint Hilary (Hilarius, Hilaire), Bishop of Toulouse in France (360)^[13][14]
• Saint Anastasius, Bishop of Brescia in Lombardy, in Italy (610)^{[3][13][15][note 6]}
• Saint Austregisilus (Aoustrille, Outrille), Bishop of Bourges and Confessor (624)^[3][13][16]
• Saint Theodore of Pavia, Bishop of Pavia (778)^[3][13][17]
• Saint Ethelbert (Albert, Albright), King of East Anglia in England, martyr (794)^[13][18] (see also May 29)
• Saint Alcuin of York, monk (804)^[19]

• St. Daumantas (Timothy, Dovmont-Timothy), prince of Pskov (1299)^[20][21]
• Saint Stephen, Abbot of Piperi in Serbia (1697)^[22]

• Translation of the holy relics (1087) of Saint Nicholas the Wonderworker (343)^{[27][note 9]} (see also: May 9 - Slavonic)
• Uncovering of the relics (1431) of St. Alexis, Metropolitan of Moscow, Wonderworker (1378)^[28]
• Repose of Schema-monk Cyriacus of Valaam (1798)^[29]

• St. Lydia of Thyatira.
• St. Marcus Eremita.
• Church of St. Theodore of Pavia, in Pavia.
• The martyred Anglo-Saxon king Æthelberht II of East Anglia (depiction of a brass plate from Hereford Cathedral).
• St. Daumantas of Pskov.
• St. Stephen of Piperi.
• St. Alexius, Metropolitan of Moscow.