Roman calendar
noun
the calendar in use in ancient Rome until 46 b.c., when it was replaced with the Julian calendar.
Compare
Year of Confusion.
Origin of Roman calendar
First recorded in 1780–90
British Dictionary definitions for roman calendar
Roman calendar
noun
the lunar calendar of ancient Rome, replaced in 45 bc by the Julian calendar. It originally consisted of 10 months, with a special month intercalated between Feb 23 and 24