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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012