阳木马年 (male Wood-Horse) 41 or −340 or −1112 — to — 阴木羊年 (female Wood-Goat) 42 or −339 or −1111
Year 86 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Cinna and Marius/Flaccus (or, less frequently, year 668 Ab urbe condita). The denomination 86 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.