When Is Orthodox Christmas 2025. According to the julian calendar (used prior to gregorian calendar) the day falls on december 25th each year. In 2025, the orthodox church calendar sets the following dates for the celebration of great christian holidays:

Due to the difference in the gregorian calendar used in many parts of the world, which is 13 days ahead, orthodox christmas falls on january 7 instead of december 25. Elsewhere in the world, christmas.