In Orthodox churches, the celebration of Vespers is somewhat different from the everyday Vespers. First of all, this is manifested in some special holiday chants sung by the choir.
The festive Vespers at the All-Night Vigil service begins with the singing of Psalm 103. This chant tells about the act of God's creation of the world. The 103rd Psalm glorifies the greatness of God, the Lord is called blessed. The chant itself begins with an appeal to the human soul for the blessing of the Creator. At this time, the priest burns the incense of the church.
Among the special solemn chants of the festive vespers, one is distinguished "Blessed is the husband." These are a few short verses from the first kathisma, which say that blessed is the person who does not engage in unclean deeds and does not participate in unrighteous meetings.
Another chant of the festive vespers is a prayer appeal to God, which is briefly called "May the Lord grant." In it, the believer asks the Lord to vouchsafe a person to live an evening without sin. Also, in this hymn, praise, glory and honor are given to all three Persons of the Holy Trinity.
At the end of Vespers, the choir sings the Christian hymn "Now Let You Go." This is the prayer of the righteous elder Simeon, which is written in the gospel. The elder was foretold that he would not die until he saw the born infant Christ. When the Mother of God brought the baby Jesus on the fortieth day to the temple for dedication of the latter to God, Elder Simeon took the baby into his own hands and uttered the words of a prayer that now the Lord (God) would release his servant in peace from this earthly life.
At the end of the festive vespers, special solemn troparia dedicated to the holiday are performed. The choir can also sing the prayer to the Most Holy Theotokos "Mother of God, Rejoice." The prayer uses the words of the Archangel Gabriel, spoken to the Virgin Mary on the day of the Annunciation.
The final festive chant of Vespers is Psalm 33. Rather, it is the first part, in which the believer again gives glory to God for the day he has lived.
