December (Dec.) is the twelfth and lastmonth of theyear in theGregorian calendar, coming betweenNovember (of the current year) andJanuary (of the following year). It has 31 days. With the name of the month coming from theLatindecem for "ten", it was the tenth month of the year beforeJanuary andFebruary were added to theRoman calendar.
December always begins on the same day of the week asSeptember, and ends on the same day of the week asApril.
December is the twelfth and last month of everycalendar year in theGregorian calendar, and is one of seven months of the year to have 31 days.December 31 is followed byJanuary 1 of the following year.
December begins on the same day of the week asSeptember every year, as each other's first days are exactly 13weeks (91days) apart. December ends on the same day of the week asApril every year, as each other's last days are exactly 35 weeks (245 days) apart.
In common years, December starts on the same day of the week asApril andJuly of the previous year, and in leap years,October of the previous year. In common years, December finishes on the same day of the week as July of the previous year, and in leap years,February and October of the previous year. In leap years and years immediately after that, December both starts and finishes on the same day of the week asJanuary of the previous year.
In years immediately beforecommon years, December starts on the same day of the week asJune of the following year, and in years immediately beforeleap years,March andNovember of the following year. In years immediately before common years, December finishes on the same day of the week asSeptember of the following year, and in years immediately before leap years, March and June of the following year.
