Jul·ian cal·en·dar • n. a calendar introduced by the authority of Julius Caesar in 46 bc, in which the year consisted of 365 days, every fourth year having 366 days. It was superseded by the Gregorian calendar though it is still used by some Orthodox Churches. Dates in the Julian calendar are sometimes designated “Old Style.”

Julian calendar a calendar introduced by the authority of Julius Caesar in 46 bc, in which the Julian year consisted of 365 days, every fourth year having 366 days. It was superseded by the Gregorian calendar, though it is still used by some Orthodox Churches. Dates in the Julian calendar are sometimes designated ‘Old Style’.

JULIAN CALENDAR

Established by Julius Caesar and used in the West until the Gregorian reform of 1582, this calendar is still in use in the Greek Orthodox Patriarchate of Jerusalem and in some Orthodox churches.

SEE ALSO Eastern Orthodox Church.