World Calendars
Revised Julian calendar date today
The Revised Julian calendar was adopted by several Orthodox churches in 1923 to correct the old Julian calendar. Its dates match the Gregorian calendar until the year 2800.
11 November 2026
The same as the Gregorian date until 2800
- In the Gregorian calendar
- Wednesday 11 November 2026
- This day began
- At midnight, as Wednesday 11 November 2026 begins
- This day ends
- At midnight, as Thursday 12 November 2026 begins
- Who uses it
- Orthodox churches including those of Constantinople, Greece, Romania and Bulgaria
- How it works
- Leap year every 4 years; century years only if dividing by 900 leaves 200 or 600
- Years count from
- The birth of Christ (Anno Domini), as in the Julian and Gregorian calendars
- Unusual detail
- It will first differ from the Gregorian calendar on 1 March 2800
Next holidays in this calendar
51 days
1 January 2027 · Gregorian, Japanese era, Thai solar (Buddhist era), Republic of China (Minguo), Juche, Holocene (Human Era), Discordian, Revised Julian, Soviet work week
How the Revised Julian calendar works
The Revised Julian calendar has the same months, month lengths and weekdays as the Julian and Gregorian calendars. Only the leap year rule is different. A year divisible by 4 is a leap year, but a year divisible by 100 is a leap year only if dividing it by 900 leaves a remainder of 200 or 600, so 2000 and 2400 are leap years and 2800 is not.
This gives an average year of 365 days, 5 hours, 48 minutes and 48 seconds, which was within two seconds of the solar year when the calendar was adopted. Its dates are the same as the Gregorian calendar from 1 March 1600 to 28 February 2800. Gregorian 29 February 2800 will be 1 March 2800 in the Revised Julian calendar.
| No. | Month | Days |
|---|---|---|
| 1 | January | 31 |
| 2 | February | 28 or 29 |
| 3 | March | 31 |
| 4 | April | 30 |
| 5 | May | 31 |
| 6 | June | 30 |
| 7 | July | 31 |
| 8 | August | 31 |
| 9 | September | 30 |
| 10 | October | 31 |
| 11 | November | 30 |
| 12 | December | 31 |
Variants and the method used here
We apply the 900-year leap rule to every year, including years before 1923, counting from the same starting day as the Gregorian calendar. On this basis the two calendars agree from 1600 to 2800 but differ by one day in some earlier centuries. Dates before 1923 are therefore a modern projection, not dates anyone used at the time.
Churches that follow this calendar celebrate Christmas on 25 December by it. Nearly all Orthodox churches still calculate Easter with the old Julian calendar, even when they follow the Revised Julian calendar for the rest of the year; the Finnish Orthodox Church is a known exception.
A short history
In May 1923 a council of Orthodox churches met in Constantinople under Ecumenical Patriarch Meletius IV. The Serbian delegation presented a proposal by Maksim Trpković, which the Serbian scientist Milutin Milanković modified to keep the new calendar in line with the Gregorian one for as long as possible. The council adopted his leap year rule and decided to drop 13 days, so that 1 October 1923 in the Julian calendar would be called 14 October.
The churches of Constantinople, Cyprus and Greece made the change in March 1924, and others followed over the next decades. The Orthodox Church of Ukraine switched on 1 September 2023, the start of the church year. Other Orthodox churches, including those of Russia, Serbia, Georgia and Jerusalem, still follow the Julian calendar.
Sources
How this site calculates the date: Julian months; a century year is a leap year only if it leaves 200 or 600 when divided by 900 (Milanković, 1923).