The twelfth and last month of the year in the Gregorian Calendar and one of seven Gregorian months with the length of thirty-one days.
In Latin, decem means ten. December was also the tenth month in the Roman calendar until January and February were added to the winter period.
December is the month with the shortest daylight hours of the year in the Northern Hemisphere and the longest daylight hours of the year in the Southern Hemisphere. In the Northern Hemisphere December is the seasonal equivalent to June in the Southern Hemisphere and vice versa. In the Northern hemisphere, the beginning of the meteorological winter is on the first of December. In the Southern hemisphere, this is the beginning of the meteorological summer.
December starts on the same day of the week as September every year. December ends on the same day of the week as April every year.