Russian Orthodox Christmas is celebrated on January 7th—not because it's a different Christmas, but because the Russian Orthodox Church follows the Julian calendar for religious holidays, while most of the world uses the Gregorian calendar.
The Two Calendars
Julian Calendar:
- Created by Julius Caesar in 45 BCE
- Used throughout Europe for over 1,500 years
- The Russian Orthodox Church still follows this calendar for religious celebrations
- On this calendar, Christmas falls on December 25th
Gregorian Calendar:
- Introduced by Pope Gregory XIII in 1582
- More astronomically accurate than the Julian calendar
- Adopted by most Western European countries starting in 1582
- The calendar we use today in most of the world
The Russian Calendar Change
After the Russian Revolution of 1917, the new Soviet government adopted the Gregorian calendar for civil use. However, the Russian Orthodox Church refused to change and continued following the Julian calendar for religious observances.
The Result: In the 21st century, there is a 13-day difference between the two calendars. December 25th on the Julian calendar equals January 7th on the Gregorian calendar.
Interesting Note: In the year 2100, the difference will become 14 days, which would shift Russian Orthodox Christmas to January 8th!
What This Means
- Russian Orthodox Christians are celebrating the same event—the birth of Jesus Christ
- They're following the same date (December 25th) but on a different calendar
- It's not a "different" Christmas—just celebrated on a different day of the modern calendar
- Other Orthodox churches (Greek, Romanian, Bulgarian) use the Gregorian calendar and celebrate on December 25th