Christmas Eve is traditionally called "Paramony" (Greek: παραμονή, Slavonic: "navechérie"). Paramony is observed as a strict fast day, on which those faithful who are physically able to, refrain from food until the first star is observed in the evening or after the Vesperal Divine Liturgy, when a meal with wine and oil may be taken. On this day the Royal Hours are celebrated in the morning. Some of the hymns are similar to those of Theophany (Epiphany) and Great and Holy Friday, thus tying the symbolism of Christ's Nativity to his death on the Cross. The Royal Hours are followed by the Vesperal Divine Liturgy of St. Basil which combines Vespers with the Divine Liturgy.