May 14 definition from wikipedia
: *1264 â€“ Battle of Lewes: Henry III of England is captured and forced to sign the Mise of Lewes, making Simon de Montfort the de facto ruler of England.
Year 14 (XIV) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Pompeius and Appuleius (or, less frequently, year 767 Ab urbe condita). The denomination 14 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.