Year 342 (CCCXLII) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Claudius (or, less frequently, year 1095 Ab urbe condita). The denomination 342 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.
^Burgersdijk, D. W. P.; Ross, Alan, eds. (2018). Imagining emperors in the Later Roman Empire. Cultural interactions in the Mediterranean. Leiden Boston: Brill. p. 173. ISBN978-90-04-37092-0.
