October 26, 2019 The Holy and Glorious Great-Martyr Demetrius, from Whose Tomb Myrrh Streams Forth (285-310); and the Commemoration of the Great and Terrible Earthquake at Constantinople of 741 AD; 2 Timothy 2:1-10; John 15:17-16:2. Rank: All-Night Vigil. Day when the faithful are highly encouraged to participate in the Divine Liturgy.