
Christmas in Russia, called Е́же по пло́ти Рождество Господа Бога и Спа́са нашего Иисуса Христа in the Russian Orthodox Church, is a holiday commemorating the birth of Jesus Christ. It is celebrated on 25 December on the Julian calendar, which corresponds to 7 January on the Gregorian calendar until 2100, when it will move to January 8 in 2101. It is considered a high holiday by the church, one of the 12 Great Feasts, and one of only four of which are preceded by a period of fasting. Traditional Russian Christmas festivities start on Christmas Eve, which is celebrated on 6 January [O.S. 24 December].