Saint John, Patriarch of Jerusalem.
St. John was Patriarch of Jerusalem in the early centuries of the Church, remembered in the Greek synaxaria as a holy hierarch who governed the Mother of Churches with wisdom and reposed in peace.
His memory is kept on March 30.
Feast day
On the New Calendar, John of Jerusalem is commemorated on March 30. Churches on the Old (Julian) Calendar keep the feast on April 12 of the civil calendar.
Also commemorated on March 30

John Climacus
Venerable, Ιωάννης της Κλίμακος
Venerable John Climacus, author of The Ladder of Divine Ascent.
Zacharias of Corinth
Hierarch, Ζαχαρίας Κορίνθου
Hieromartyr Zacharias, Metropolitan of Corinth, beheaded by the Ottomans.
Sophronios of Irkutsk
Hierarch, Σωφρόνιος Ιρκούτσκ
Saint Sophronios, Bishop of Irkutsk, missionary of Siberia.