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
Undecimber Undecimber Undecimber or Undecember is a name for a thirteenth month in a calendar that normally has twelve months. Duodecimber or Duodecember is similarly a fourteenth month. The word "undecimber" is based on the Latin word "undecim" meaning "eleven". It is formed in analogy with "December," which, though the twelfth month in the Gregorian calendar, derives from "decem" meaning "ten". The word "undecember" (abbreviated "Vnde") is recorded from a Roman inscription according to the Oxford Latin Dictionary, which defines it as "a humorous name given to the month following December". Some recent authors report the names "Undecember" and "Duodecember" for