Rites in honour of Tellus, the earth goddess which perhaps included a lectisternium (a ‘dinner party’ at which images of the god(s) would ‘dine’ with participants) in honour of Ceres.
405 B.C. — battle of Aegospotami (by one reckoning)
Agonalia — the fourth and final occurrence of this festival in the Roman calendar; like all instances, the Rex Sacrorum would sacrifice a ram in the Regia, but on this occasion, the sacrifice was apparently in honour of Sol Indiges.
Septimontium — a somewhat obscure festival apparently originally only celebrated by the ‘montani’ (i.e. the ‘hill-dwellers’) which involved sacrifices on each of Rome’s seven hills.
ante diem vi idus decembresB&W reproduction of an imaginary portrait of Horace. (Photo credit: Wikipedia)
Rites in honour of Tiberinus and Gaia — not a lot is known about these rites; Tiberinus had a temple on the Tiber island and presided over the Tiber (of course); Gaia seems to have originally given the Campus Martius (a.k.a. Campus Tiberinus) to the Roman people.
65 B.C. — birth of the poet Horace (Quintus Horatius Flaccus)