Civil & Historical
Julian (Old Style)
Caesar's calendar · now 13 days behind
Julius Caesar’s reform of 46 BCE, with a leap year every fourth year — slightly too many, so it drifted against the seasons. The Gregorian replaced it in 1582; it now trails by 13 days and still fixes Orthodox Christmas.
—
In UTC at 02:02 on October 27, 2026, this calendar read 14 October 2026. The reading above is live, in your own time zone.
At a glance
- Type
- Solar
- Origin
- Introduced by Julius Caesar in 46 BCE
- Year
- 365 days, or 366 in a leap year (365.25 on average)
- Months
- 12, of 28–31 days
- Week
- 7 days
- Leap rule
- One leap day every 4 years, with no exception
- Counts from
- The traditional birth of Christ (AD)
- Where it’s used
- Parts of the Orthodox church; it runs 13 days behind the Gregorian from 1900 to 2100
- How it’s worked out here
- Exact arithmetic from the day count — the rule has no exceptions to approximate
Does something here look wrong? Tell us about the Julian (Old Style) calendar.