Divine Liturgy of St. John Chrysostom
During the Vespers, eight Old Testament lections ("parables") which prefigure or prophesy the Incarnation of Christ are read, and special antiphons are chanted. If the Feast of the Nativity falls on a Sunday or Monday, the Royal Hours are chanted on the previous Friday, and on the Paramony the Vesperal Divine Liturgy of St. John Chrysostom is celebrated in the morning, with its readings and antiphons, and the fasting is lessened to some degree—a meal with wine and oil being served after the Liturgy.