March 31 (Eastern Orthodox liturgics)

Mar. 30 - Eastern Orthodox Church calendar - Apr. 1

All fixed commemorations below are observed on April 13 by Orthodox Churches on the Old Calendar.

For March 31st, Orthodox Churches on the Old Calendar commemorate the Saints listed on March 18.

St Hypatius the Wonderworker of (Menologion of Basil II)

A 15th-century Russian icon of St. Hypatius (Hypatian Monastery).

St. Ivan Kalita.

St. Jonah of Moscow

St. Innocent as Metropolitan of Moscow.

The Relics of Saint Innocent of Alaska, in the Assumption Cathedral at the Trinity-Sergius Monastery in Sergiev Posad, Russia.

Our Lady of Iveron, Mount Athos, Greece.

Greek Sources

Russian Sources

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Wikipedia