2025 Orthodox Calendar Holidays And Observances. Plan your year with key dates, cultural and religious events. Orthodox christmas eve, marked primarily on january 6th, stands as a significant religious observance for millions of orthodox christians around the world.

The julian calendar is a solar calendar introduced by julius caesar in 45 bce, aiming to align the calendar year with the solar year. Explore religious calendars and find public holidays and observances across countries worldwide.