December (Roman month) December (Roman month) December (from Latin "decem", "ten") or mensis December was originally the tenth month of the Roman calendar, following November ("novem", "nine") and preceding Ianuarius. It had 29 days. When the calendar was reformed to create a 12-month year starting in Ianuarius, December became the twelfth month, but retained its name, as did the other numbered months from Quintilis (July) through December. Its length was increased to 31 days under the Julian calendar reform. The Romans did not number days of a month sequentially from the first day through the last. Instead, they counted back from the three
Roman Month Roman Month The Roman Month (German "Römer Monat", pl. "Römer Monate", abbr. RM) was a basic unit of imperial taxation in the Holy Roman Empire, initially worth around 128,000 Rhenish guilders when the underlying tax was created in 1521 by the emperor Charles V, equivalent to a month's wages for around 4,202 cavalry and 20,063 infantrymen. It gained this title due to its initial purpose of providing for one month's escort for the emperor's trip to Rome to be crowned by the Pope, though it was rarely, if ever, used for this purpose. The tax was collected through a system