All the Orthros services from April to June for the Weekday celebration of Feast Days. Contained are all of the dramatic changes in rubrics and hymnology mandated during the Easter to Pentecost liturgical cycle; full and complete for every year from now until the year 2025. This makes it unique because, though needed, it has never before been attempted. This represents, literally, thousands of hours of work researching and calculating all the necessary changes. There are included, for example, eight (8) different ways to celebrate Orthros for the Feast Day of Saints Constantine and Helen. Other services included are: Saturday of the Souls (for both Meat Fare and Pentecost); Lazarus Saturday; Ascension; and Mid-Pentecost. The other Saints’ Days indicated by our Archdiocese for celebration are also included.