Ice swimming is also practised during the entire winter by Walrus Clubs, whose members are called "walruses" (, "morzhi"). In other Eastern European countries such as Bulgaria and Romania, the Epiphany is celebrated on 6 January. There it is tradition for Orthodox priests to cast wooden crosses in the water, which are then retrieved by the believers. It is popularly believed that the person who finds the cross is freed from evil spirits. Other countries where this is done include Serbia and Montenegro.