ante diem xviii kalendas januarias

Consualia -- a festival in honour of Consus which likely involved a similar celebration held on August 21 (i.e. horse races, chariot races, and garlanding of the steeds)
337 B.C. -- death of Timoleon (according to one reckoning)
19 B.C. -- dedication of the Ara Fortunae Reducis
37 A.D. -- birth of the future emperor Nero
130 A.D. -- birth of the future co-emperor Lucius Verus