April 20 - Eastern Orthodox liturgical calendar - April 22
All fixed commemorations below are observed on May 4 by Eastern Orthodox Churches on the Old Calendar. [note 1]
For April 21, Orthodox Churches on the Old Calendar commemorate the Saints listed on April 8 .
March 27 - Eastern Orthodox liturgical calendar - March 29
March 30 - Eastern Orthodox liturgical calendar - April 1
Mar. 31 - Eastern Orthodox liturgical calendar - Apr. 2
April 3 - Eastern Orthodox liturgical calendar - April 5
April 4 – Eastern Orthodox liturgical calendar – April 6
April 5 — Eastern Orthodox liturgical calendar — April 7
April 7 - Eastern Orthodox liturgical calendar - April 9
Apr. 9 - Eastern Orthodox liturgical calendar - Apr. 11
April 11 - Eastern Orthodox liturgical calendar - April 13
April 12 - Eastern Orthodox liturgical calendar - April 14
April 13 - Eastern Orthodox liturgical calendar - April 15
April 16 - Eastern Orthodox liturgical calendar - April 18
April 22 - Eastern Orthodox liturgical calendar - April 24
Apr. 23 - Eastern Orthodox liturgical calendar - Apr. 25
April 24 - Eastern Orthodox liturgical calendar - April 26
April 17 - Eastern Orthodox liturgical calendar - April 19
April 18 - Eastern Orthodox liturgical calendar - April 20
April 19 - Eastern Orthodox liturgical calendar - April 21
April 21 - Eastern Orthodox liturgical calendar - April 23
April 6 - Eastern Orthodox liturgical calendar - April 8
Greek Sources
Russian Sources