was a leap year starting on Thursday
(link will display the full calendar) of the Julian calendar
- Possible date of the Battle of Mons Graupius (83 or 84), in which Gnaeus Julius Agricola defeats the Caledonians.
- Pliny the Younger is sevir equitum Romanorum (commander of a cavalry squadron).
- The construction of the Limes, a line of Roman fortifications from the Rhine to the Danube, is begun.
- Through his election as consul for ten years and censor for life, Domitian openly subordinates the republican aspect of the state to the monarchical.
- Domitian increases the troops' pay by one third, thus securing their loyalty.
- Change of Jianchu era to Yuanhe era of the Chinese Eastern Han Dynasty.