In fact, both Orthodox and Catholics celebrate Christmas on the same day - December 25th. Although this date of birth of Jesus Christ is conditional. It is not found in the Bible or in any other document.

December 25 in the Roman Empire traditionally celebrated one of the most important holidays - "Invincible Sun". It was then that the darkness receded noticeably, and the daylight hours became longer. To reduce the influence of the pagan holiday, on this day began to celebrate the birthday of the "true sun" - Jesus Christ, some historians say.

The tradition of celebrating Christmas on December 25 among Catholics and Orthodox has remained to this day. However, they do it on different calendars. In the West - according to the Gregorian, and, for example, in Russia, Georgia, Serbia and Ukraine - according to the Julian calendar.