Russian Patriarch Kirill delivers a Christmas service at the cathedral of Christ of Savior, in Moscow, early on January 7, 2013. Orthodox Christians celebrate Christmas on January 7 in the Middle East, Russia and other Orthodox churches that use the old Julian calendar instead of the 17th-century Gregorian calendar adopted by Catholics, Protestants, Greek Orthodox and commonly used in secular life around the world. AFP PHOTO / ALEXANDER NEMENOV (Photo credit should read ALEXANDER NEMENOV/AFP/Getty Images)