Church holidays are days set aside by the church for celebrating various events from the life of Christ, the Virgin Mary, and the saints. The most important holiday in the Ukrainian churches is Easter (Resurrection of Christ). Next is Christmas (December 25), followed by Epiphany (January 6), Christ's presentation at the Temple (February 2), Annunciation (March 25), Christ's entrance into Jerusalem (Palm Sunday), Ascension (40 days after Easter), Pentecost or Sunday of the Trinity, Transfiguration (August 6), Dormition of the Virgin Mary (August 15), Nativity of the Virgin Mary (September 8), Elevation of the Cross (September 14), and Presentation of the Virgin Mary at the Temple (November 21). Easter Sunday does not have a set date, but changes every year to fall on the first Sunday after the full moon that occurs on or right after the spring equinox. The dates of the other movable feasts depend on the date of Easter. The Ukrainian Catholic church has a special movable feast, the Feast of the Holy Eucharist (second Sunday after Pentecost). Individual parishes celebrate feasts in honor of the saint or event to which the local church is dedicated. In the Ukrainian Catholic church the Feast of the Immaculate Conception (December 9) is a major Holiday. There are also holidays connected with local saints or with historical events, such as the feasts of Prince Volodymyr (July 15) and of St Mary Protectress (October 1). In Ukraine the feasts are celebrated according to the Julian (old style) calendar. Some Ukrainian communities abroad, however, now celebrate according to the Gregorian (new style) calendar.
Christian holidays and saints' days are grouped in four cycles according to the seasons: in the spring cycle there are the celebrations of the Annunciation, Easter, and St. George; in the summer cycle, Pentecost, Ivan Kupalo, and St. Elijah; in the fall cycle, the first and second Blessed Virgin, the Holy Protectress, and St. Demetrius; and in the winter cycle, Christmas, New Year, and Epiphany.