Russian President Dmitry Medvedev (L) and his wife Svetlana (not pictured) attend the Orthodox Christmas service in Moscow's Christ The Savior Cathedral, late on January 6, 2011. Christmas falls on January 7 for Orthodox Christians in the the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 16th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo byd NATALIA KOLESNIKOVA/AFP/Getty Images)
Russian President Dmitry Medvedev (L) and his wife Svetlana (R) cross themselves during the Orthodox Christmas service in Moscow's Christ The Savior Cathedral, late on January 6, 2011. Christmas falls on January 7 for Orthodox Christians in the the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 16th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo by NATALIA KOLESNIKOVA/AFP/Getty Images)
Russian President Dmitry Medvedev (L)speaks with his wife Svetlana (R) during the Orthodox Christmas service in Moscow's Christ The Savior Cathedral, late on January 6, 2011. Christmas falls on January 7 for Orthodox Christians in the the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 16th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. (Photo by NATALIA KOLESNIKOVA/AFP/Getty Images)
Russian President Dmitry Medvedev (L) and his wife Svetlana (R) attend the Orthodox Christmas service in Moscow's Christ The Savior Cathedral, late on January 6, 2011. Christmas falls on January 7 for Orthodox Christians in the the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 16th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. A (Photo by NATALIA KOLESNIKOVA/AFP/Getty Images)
Russia's President Dmitry Medvedev (R) talks with Patriarch of Moscow and All Russia Kirill after the Orthodox Christmas mass at Christ the Saviour Cathedral in Moscow, January 7, 2011. REUTERS/Vladimir Rodionov/RIA Novosti/Kremlin