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)

215 B.C. -- assassination of Hieronymus, one of the tyrants of Syracuse (by 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