Roman calendar
noun
1.
the calendar in use in ancient Rome until 46 b.c., when it was replaced with the Julian calendar.
Compare
Year of Confusion
.
Origin
1780-90
British Dictionary definitions for
Roman calendar
Roman calendar
noun
1.
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