🛠️ Invention or technique

Revised Julian calendar

Calendario juliano revisado

Date
1923 · confidence high
Place
University of Belgrade, Belgrade, Serbia
Credited to
Milutin Milanković
Field
Knowledge & symbols

What it is

Milanković proposed a more accurate alternative to both the Julian and Gregorian calendars, changing the leap-year rule: century years are leap years only if, divided by 900, they leave a remainder of 200 or 600. The proposal was debated and approved at the Constantinople Conference of May-June 1923.

It was never adopted as a civil calendar by any state; among Orthodox churches it was adopted by Constantinople (1924), Alexandria and Antioch (1928), Romania, Bulgaria (1968) and others, while Russia, Serbia, Georgia and Mount Athos still use the original Julian calendar.

What it led to

  • Liturgical adoption by several Orthodox churches from 1924
  • Fixed dates coinciding with the Gregorian calendar until the year 2800

Links

Sources✓ verified 2026-09-28