In Russia and other Eastern European countries where Eastern Orthodox Christianity is the prevalent religion ice swimming is connected with the celebration of the Epiphany. The Epiphany is observed on 19 January according to the Julian calendar of the Russian Orthodox Church. The day marks the baptism of Jesus in the River Jordan. To celebrate this, holes are cut in the ice on rivers, lakes or other bodies of water, usually in the form of a Christian or Orthodox cross. Around midnight, believers submerge themselves three times in the water to honour the Holy Trinity, after a priest says a prayer.