In the Christian liturgical calendar, there are several different feasts known as Feasts of the Cross, all of which commemorate the cross used in the crucifixion of Jesus. While Good Friday is dedicated to the Passion of Christ and the Crucifixion, these days celebrate the cross itself, as the instrument of salvation.
The discovery of the True Cross in 326 by Saint Helena, the mother of the Roman Emperor Constantine I (venerated in the Eastern Church as Saint Constantine) during a pilgrimage she made to Jerusalem. The Church of the Holy Sepulchre was then built at the site of the discovery, by order of Helena and Constantine. The church was dedicated nine years later, with a portion of the cross placed inside it. In 614, that portion of the cross was carried away from the church by the Persians, and remained missing until it was recaptured by the Byzantine Emperor Heraclius in 628. The cross was returned to the church the following year after initially having been taken to Constantinople by Heraclius.
The date used for the feast marks the dedication of the Church of the Holy Sepulchre in 335. This was a two-day festival: although the actual consecration of the church was on September 13, the cross itself was brought outside the church on September 14 so that the clergy and faithful could pray before the True Cross, and all could come forward to venerate it.
In Roman Catholic liturgical observance, red vestments are worn at church services conducted on this day, and if the day falls on a Sunday, its Mass is used instead of that for the occurring Sunday in Ordinary Time, what some would call a Sunday after Pentecost.
Until 1969, the Wednesday, Friday and Saturday of the calendar week after the one in which 14 September falls were designated as one of each year's four sets of Ember days by the Church in the West. The organization of celebrations of this kind is now left up to the decision of Episcopal Conferences in view of local conditions and customs.
September 14 is the titular feast of the Congregation of Holy Cross and the Episcopal Church's Order of the Holy Cross. This date also marks the beginning of the period of fasting, stipulated in the Rule of St. Albert to be followed by the religious of the Carmelite spiritual family, and ending Easter Sunday.
During the All-Night Vigil on the Eve of the Feast, a cross is placed on the Holy Table (altar) where it reposes during the Vigil. The cross is placed on a tray that has been covered with an Aër (liturgical veil) and decorated with fresh basil leaves and flowers, and a candle burns before it. The cross reposes on the "High Place" of the Holy Table, where the Gospel Book normally lies. Those portions of the Vigil which would normally take place before the Icon of the Feast (the chanting of the Polyeleos and the Matins Gospel) instead take place in front of the Holy Table.
One of the high points of the celebration is when, after the Great Doxology, the priest or bishop brings the Cross out of the sanctuary. He sets the cross on a table (tetrapod or analogion) in the center of the temple (nave of the church) as the choir sings of the festal Troparion of the Cross: "Save, O Lord, Thy people, and bless Thine inheritance, granting unto Orthodox Christians [sometimes translated as "Christians of the true faith"] victory over enemies, and by the power of Thy Cross, do Thou preserve Thy commonwealth."
In cathedrals and monasteries, a special "Exaltation" is performed by the bishop or abbot, standing in the center of the church. This consists of his taking the cross in his hands and raising it above his head. He makes an exclamation, to which the choir responds, chanting, Kyrie eleison ("Lord, have mercy") 100 times. As they chant, he makes the sign of the cross with it three times, then slowly bows down to the ground, and stands up again raising the cross above his head as before. This process is repeated four more times to the four points of the compass.
Then, whether the special Exaltation has been performed or not, the clergy and the members of the congregation prostrate themselves on the ground as all sing, "Before Thy Cross, we bow down in worship, O Master, and Thy holy Resurrection we glorify" three times (at the words "Thy holy Resurrection" all stand up again). Then all come forward to venerate the cross and receive the priest's blessing (see Veneration of the Cross, below). During the veneration, stichera attributed to the Emperor Leo are chanted by the choir.
The cross will remain in the center of the temple throughout the Afterfeast, and the faithful will venerate it whenever they enter or leave the church. Finally, on the Apodosis of the Feast, the priest and deacon will cense around the cross, there will be a final veneration of the cross, and then they will solemnly bring the cross back into the sanctuary through the Holy Doors. This same pattern of bringing out the cross, veneration, and returning the cross at the end of the celebration is repeated at a number of the lesser Feasts of the Cross mentioned below.
On the Sunday nearest September 28 (always two weeks after the Exaltation) the Armenian Church celebrates the Feast of the Holy Cross of Varak (Varaka Khach) commemorating the 3rd century placement of an authentic relic of the cross in Armenian soil. This is a cross feast unique to the Armenian Church.
On the Sunday closest to October 26, the Armenian Church celebrates the Discovery of the Holy Cross (Kyood Khach), commemorating the finding of the True Cross by Saint Helena (327 AD).
This feast had been recombined with the September celebration by Pope Pius XII, at the suggestion of Annibale Bugnini. However, the feast day of the Finding of the Holy Cross is still commemorated exactly as was in the past by a significant minority of Traditional Roman Catholic parishes, as well as by some churches within the Anglican Communion (such as the Church of England) who deem this feast an optional observance.
The history of this feast begins in Constantinople (modern-day Istanbul, Turkey). It was the custom there to carry the relic of the True Cross through the streets and squares of the city to ask for God's blessing, and for relief from sickness. On the eve of the feast (31 July), which is observed as a Forefeast, it was taken out of the imperial treasury, and laid upon the altar of the "Great Church" (Hagia Sophia). On 1 August it was solemly placed in the center of the Great Church for all the faithful to venerate. The relic was taken in procession daily throughout the city, offering it to the people to venerate until the Feast of the Dormition of the Theotokos (August 15), when it was returned again to the imperial treasury.
In commemoration of this tradition, it is customary to have a crucession (a procession headed by the cross) and celebrate the Lesser Blessing of Water on 1 August. It is the first of three "Feasts of the Saviour" in the month of August, the other two being the Transfiguration (6 August) and the Icon of Christ "Not Made by Hands" (16 August). Because of the blessing of holy water, this holy day is sometimes called "Savior of the Water." There may also be celebrated on this day the Rite of Blessing New Honey, for which reason the day is also referred to as "Savior of the Honey."
According to Saint Nikolaj Velimirović, this feast was instituted by mutual agreement of the Greeks and Russians to commemorate the simultaneous victories of the Byzantine Emperor Manuel I Komnenos over the Bulgarians and the Russian Prince Andrei Bogolyubsky over the Saracens in the 12th century.
In the Russian Orthodox Church, this feast also celebrates the Baptism of Rus, which occurred on 1 August 988.
The Roman Catholic and Orthodox Churches have a formal Adoration of the Cross during the services for Good Friday.
In the Roman Breviary before the 1961 reform, a Commemoration of the Cross was made during Eastertide except when the Office or Commemoration of a Double or Octave occurs, replacing the Suffrage of the Saints said outside Eastertide.
Eastern Christians celebrate an additional Veneration of the Cross on the third Sunday of Great Lent. The services for this day are modelled on the Feast of the Exaltation (14 September), including bringing the cross out into the center of the church and its veneration by the faithful. It remains in the center of the church until Friday of the week following (the Fourth Week of Great Lent). On Monday and Wednesday of the Fourth Week, a Veneration of the Cross takes place at the First Hour (repeating a portion of the service from the All-night Vigil of the previous Sunday). On Friday of that week, the veneration takes place after the Ninth Hour, after which the cross is returned to the sanctuary by the priest and deacon.
The faithful come forward and make two prostrations, make the sign of the cross on themselves, and kiss the feet of Christ on the cross, and then make a third prostration. After this, they will often receive a blessing from the priest, and bow towards their fellow worshippers on each side of the church (this latter practice is most commonly observed in monasteries).