 The idiomela are "exceptionally rich in doctrinal content, summing up the whole theology of the Great Fast".The events of the time are recorded in the writings of Leontius in his book "The Life of St. Stephen the Sabaite".His feast day is celebrated on October 28 on the Liturgical calendar of the Orthodox Church (for those Orthodox Churches which follow the traditional Julian Calendar, October 28 falls on November 10 of the modern Gregorian Calendar).