The
Revised Julian calendar, also known as the
Milankovic calendar, or, less formally,
New calendar, is a
calendar, developed and proposed by the Serbian scientist
Milutin Milankovic in 1923, which effectively discontinued the 340 years of divergence between the naming of dates sanctioned by those
Eastern Orthodox churches adopting it and the
Gregorian calendar that has come to predominate worldwide. This calendar was intended to replace the ecclesiastical calendar based on the
Julian calendar hitherto in use by all of the Eastern Orthodox Church. The Revised Julian calendar temporarily aligned its dates with the Gregorian calendar proclaimed in 1582 by
Pope Gregory XIII for adoption by the
Christian world.