Christian feast day: Procession of the Cross and the beginning of Dormition Fast (Eastern Orthodoxy)

The Feast of the Holy Cross, or Feast of the Cross, commemorates the cross used in the crucifixion of Jesus. In the Christian liturgical calendar, there are several different celebrations which honor and celebrate the cross used in the crucifixion. Unlike Good Friday, which is dedicated to the passion of Christ and the crucifixion, these feast days celebrate the Cross itself, as the sign of salvation. It is chiefly celebrated by Catholics, Eastern Orthodox, Oriental Orthodox, Church of the East, Old Catholics, Lutherans and Anglicans, and to a lesser extent by Presbyterians, Methodists and Baptists. The most common day of commemoration is September 14 for churches that use the Gregorian calendar and September 27 for churches that use the Julian calendar, Ge'ez calendar, or Coptic calendar.

The Dormition of the Mother of God is a Great Feast of the Eastern Orthodox, Oriental Orthodox, and Eastern Catholic Churches. It celebrates the "falling asleep" (death) of Mary the Theotokos, and her being taken up into heaven. The Feast of the Dormition is observed on August 15, which for the churches using the Julian calendar corresponds to August 28 on the Gregorian calendar. The Armenian Apostolic Church celebrates the Dormition not on a fixed date, but on the Sunday nearest 15 August. In Western Churches the corresponding feast is known as the Assumption of Mary, with the exception of the Scottish Episcopal Church, which has traditionally celebrated the Falling Asleep of the Blessed Virgin Mary on August 15.

The Eastern Orthodox Church, officially the Orthodox Catholic Church, and also called the Greek Orthodox Church or simply the Orthodox Church, is one of the three major doctrinal and jurisdictional groups of Christianity, with approximately 230 million baptised members. It operates as a communion of autocephalous churches, each governed by its bishops via local synods. The church has no central doctrinal or governmental authority analogous to the pope of the Catholic Church. Nevertheless, the Ecumenical Patriarch of Constantinople is recognised by them as primus inter pares, a title held by the patriarch of Rome prior to 1054. As one of the oldest surviving religious institutions in the world, the Eastern Orthodox Church has played an especially prominent role in the history and culture of Eastern and Southeastern Europe. Since 2018, there has been an ongoing schism between Constantinople and Moscow, with the two not in full communion with each other.