April 27 - Eastern Orthodox liturgical calendar - April 29
All fixed commemorations below celebrated on May 11 by Eastern Orthodox Churches on the Old Calendar. [note 1]
For April 28th, orthodox churches on the Old Calendar commemorate the saints listed on April 15 .
March 27 - Eastern Orthodox liturgical calendar - March 29
Mar. 31 - Eastern Orthodox liturgical calendar - Apr. 2
April 1 - Eastern Orthodox liturgical calendar - April 3
April 3 - Eastern Orthodox liturgical calendar - April 5
April 5 — Eastern Orthodox liturgical calendar — April 7
April 7 - Eastern Orthodox liturgical calendar - April 9
April 8 - Eastern Orthodox liturgical calendar - April 10
April 10 - Eastern Orthodox liturgical calendar - April 12
April 11 - Eastern Orthodox liturgical calendar - April 13
April 16 - Eastern Orthodox liturgical calendar - April 18
April 24 - Eastern Orthodox liturgical calendar - April 26
April 25 - Eastern Orthodox liturgical calendar - April 27
April 26 - Eastern Orthodox Church calendar - April 28
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 29 - Eastern Orthodox liturgical calendar - May 1
February 27 - Eastern Orthodox liturgical calendar - March 1.
April 6 - Eastern Orthodox liturgical calendar - April 8
March 13 - Eastern Orthodox liturgical calendar - March 15
Greek Sources
Russian Sources