The Roman Calendars borrowed part of their calendars from the early Greeks. The Roman calendar consisted of 10 months and 304 days. They have not taken to account of the remaining 61 days which fell in the middle of the winter, and just simply ignored them. The names of the 10 Roman calendar months are Martius, Aprilis, Maius, Junius, Quintilis, Sextilis, September, October, November and December.