(Lat. December), the last month of the year, in which the sun enters the tropic of Capricorn and makes the winter solstice. December was the tenth month in Romulus's year, which commenced with March; and hence it was named from its number, decem, ten. The Romillian December contained 30 days; Numa reduced it to 29; and Julius Caesar increased it to 31. See CALENDAR, vol. vi., p. 77.