Eastern Orthodox Christmas 2025. The nativity fast, also known as the fast of the nativity, is one of the canonical fasting seasons in the orthodox christian church. The focal point of orthodox christmas observance is the divine liturgy, a service of the eastern orthodox church embodying scripture readings, hymns, and holy communion.
According to the julian calendar (used prior to gregorian calendar) the day falls on december 25th each year. Online calendar of orthodox holidays for 2025.