A man dressed as Ded Moroz (Grandfather Frost), the Russian Santa Claus, leads people to dance during a celebration on Orthodox Christmas at Sokolniky Park of Moscow, capital of Russia, on Jan. 7, 2013. Church services took place across Russia from Sunday to Monday to mark the Orthodox Christmas, with thousands of people attending ceremonies to celebrate the holiday. In accordance with the Julian calendar which was introduced by Julius Caesar in 45 B.C., the Orthodox Christmas takes place on Jan. 7, 13 days after the Western Christmas. (Xinhua/Jiang Kehong)

An actor and an actress perform during a celebration on Orthodox Christmas at Sokolniky Park of Moscow, capital of Russia, on Jan. 7, 2013. Church services took place across Russia from Sunday to Monday to mark the Orthodox Christmas, with thousands of people attending ceremonies to celebrate the holiday. In accordance with the Julian calendar which was introduced by Julius Caesar in 45 B.C., the Orthodox Christmas takes place on Jan. 7, 13 days after the Western Christmas. (Xinhua/Jiang Kehong)

A girl writes her wishes for new year during a celebration on Orthodox Christmas at Sokolniky Park of Moscow, capital of Russia, on Jan. 7, 2013. Church services took place across Russia from Sunday to Monday to mark the Orthodox Christmas, with thousands of people attending ceremonies to celebrate the holiday. In accordance with the Julian calendar which was introduced by Julius Caesar in 45 B.C., the Orthodox Christmas takes place on Jan. 7, 13 days after the Western Christmas. (Xinhua/Jiang Kehong)

Peope take part in a celebration on Orthodox Christmas celebration at Sokolniky Park of Moscow, capital of Russia, on Jan. 7, 2013. Church services took place across Russia from Sunday to Monday to mark the Orthodox Christmas, with thousands of people attending ceremonies to celebrate the holiday. In accordance with the Julian calendar which was introduced by Julius Caesar in 45 B.C., the Orthodox Christmas takes place on Jan. 7, 13 days after the Western Christmas. (Xinhua/Jiang Kehong)

A girl dressed as angel dances with children during a celebration on Orthodox Christmas at Sokolniky Park of Moscow, capital of Russia, on Jan. 7, 2013. Church services took place across Russia from Sunday to Monday to mark the Orthodox Christmas, with thousands of people attending ceremonies to celebrate the holiday. In accordance with the Julian calendar which was introduced by Julius Caesar in 45 B.C., the Orthodox Christmas takes place on Jan. 7, 13 days after the Western Christmas. (Xinhua/Jiang Kehong)