When Is Orthodox New Year 2025. When is orthodox new year's day shown on a calendar. The orthodox new year, also known as the old new year, is on january 14th on the gregorian calendar.

The orthodox new year is an informal holiday celebrated by orthodox churches in russia, serbia, and other eastern european countries, following the julian calendar. Orthodox new year will remain on january 14th until 2100, but the inevitable drift of the calendar will change it to january 15th—if the calendar is still in use by orthodox churches after that year.