November (Roman month) November (Roman month) November (from Latin "novem", "nine") or mensis November was originally the ninth of ten months on the Roman calendar, following October ("octo", "eight") and preceding December ("decem", "ten"). It had 29 days. In the reform that resulted in a 12-month year, November became the eleventh month, but retained its name, as did the other months from September through December. A day was added to November during the Julian calendar reform in the mid-40s BC. The outstanding event during November was the Plebeian Games from the 4th through the 17th. The month had few other festivals. It was
September (Roman month) to the period August 19 to September 17. 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, depending on the month), the Ides (13th or 15th), and the Kalends (1st) of the following month. The Nones of September was the 5th, and the Ides the 13th. The last day of September was the "pridie Kalendas Octobrīs," "day before the Kalends of October". Roman counting was inclusive; September 9 was "ante diem V Idūs Septembrīs", "the