Revised Julian calendar
calendar proposed by M. Milanković in 1923 and adopted by some Eastern Orthodox churches, according to which a year is a leap year if it is divisible by 4, unless it is divisible by 100, unless its remainder is 200 or 600 when divided by 900
- If the year number can be divided by four without rest, the year is a leap year (same as Julian calendar and Gregorian calendar).
- If the year can be divided by 100, it is not a leap year (same as Gregorian calendar).
- If dividing the year by 900 leaves a remainder of 200 or 600, the year is a leap year.
Until the year 2800, this calendar will be in sync with the Gregorian calendar; From 2800 to 2900, the Gregorian calendar will be 1 day off.