What does Julian calendar mean?
• JULIAN CALENDAR (noun) The noun JULIAN CALENDAR has 1 sense: 1. the solar calendar introduced in Rome in 46 b.c. by Julius Caesar and slightly modified by Augustus, establishing the 12-month year of 365 days with each 4th year having 366 days and the months having 31 or 30 days except for February Familiarity information: JULIAN CALENDAR used as a noun is very rare.