November (Roman month) favored the cult of Isis. The Romans did not number days of a month sequentially from the first day through the last. Instead, they counted back from the three fixed points of the month: the Nones (5th or 7th), the Ides (13th or 15th), and the Kalends (1st) of the following month. The Nones of November was the 5th, and the Ides the 13th. The last day of November was the "pridie Kalendas Decembrīs," "day before the Kalends of December". Roman counting was inclusive; November 9 was "ante diem V Idūs Novembrīs", "the 5th day before the Ides of November,"
September (Roman month) BC as part of the Julian calendar reform. September has none of the archaic festivals that are marked in large letters for other months on extant Roman "fasti". Instead, about half the month is devoted to the "Ludi Romani", "Roman Games", which developed as votive games for Jupiter Optimus Maximus ("Jupiter Best and Greatest"). The "Ludi Romani" are the oldest games instituted by the Romans, dating from 509 BC. On the Ides of September (the 13th), Jupiter was honored with a public banquet, the "Epulum Jovis". A nail-driving ritual in the temple marked the passing of the political year during