December

December is December and the last month of the year in the Gregorian calendars. This is also the last of the seven months that are 31 days long.

December, from Très Riches Heures du duc de Berry December got its name from the Latin word Decm (meaning ten) because it was originally the tenth month of the year according to Romulus c. 750 BC, beginning in March. Winter days after December are not included in any month. The months of January and February were then created out of the non-month period and added to the beginning of the calendar, but December retained its name.