Articles About December (14)
![Blurred calendar page with Gregorian calendar](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/istock-666290484.jpg?1)
The 12 Months of the Year
The 12 months of the year are linked to the Moon's orbit around Earth. Why are there 12 months? What do the month names mean?
![Illustration image](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/four-seasons.jpg?1)
Defining Seasons
When do seasons begin and end in the two hemispheres?
![The Full Moon behind three horses.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/farmers-almanac-horses.jpg?1)
Full Moon Names
Full Moons had given names in many ancient cultures. The Full Moon names we use today often reflect nature like Harvest Moon.
![Calendar of Cosmic Events, Watch the Sky! Calendar of Cosmic Events](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/fb--cosmic-events-01.png?1)
2021 Cosmic Calendar
Celestial events and highlights of 2021 and 2022 including supermoons, solar and lunar eclipses, meteor showers, solstices, and equinoxes.
![Houses and trees in the snow at dusk.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/winter-solstice-nothern-hemisphere.jpg?1)
December Solstice
The December solstice is the shortest day the Northern Hemisphere. South of the equator, it's the longest day.
![The Sun shining through a naked tree in winter.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/tree-winter-solstice.jpg?1)
When Is Winter 2021?
Winter starts at the winter solstice. When is the winter solstice this year?
![Sun peeking through trees with snow on the leaves and branches and snow on the ground.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/december-solstice-winter.jpg?1)
December Solstice Facts
10 things you may not know about the December Solstice, the shortest day of the year in the Northern Hemisphere.
![The Sun shining through the Stonehenge ancient monument.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/stonehenge-solstice2.jpg?1)
When Is Summer Solstice?
The summer solstice in the Northern Hemisphere is in June, while in the Southern Hemisphere, it's in December.
![Desembers birth flower, holly bush with red berries covered in snow. Desembers birth flower, holly bush with red berries covered in snow.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/12-desember-holly.jpg?1)
The Month of December
December is the twelfth month of the year and has 31 days. It was originally the tenth month of the Roman calendar until 153 BCE.
![Moonrise over alpine peaks in Utah.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/cold-moon.jpg?1)
December: Cold Moon
The December Full Moon is called the Cold Moon, Long Nights Moon, the Moon before Yule, Oak Moon, and Wolf Moon.
![Sun peeking through trees with snow on the leaves and branches and snow on the ground.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/december-solstice-winter.jpg?1)
December Solstice Customs
Learn more about the customs, traditions and events surrounding the December solstice.
![Parents playing with their young daughter in the evening sun](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/evening-family.jpg?1)
June Solstice Facts
11 things you may not know about the June Solstice.
![Illustration image](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/ison.jpg?1)
All about Comet ISON
Everything you need to know about Comet ISON or C/2012 S1.
![See 46P/Wirtanen zoom across the sky with the Night Sky Map. Screenshot of the Night Sky Map showing Comet Wirtanen's path.](http://webcf.waybackmachine.org/web/20211129111746im_/https://c.tadst.com/gfx/150x84/comet-46p-wirtanen-night-sky-map.png?1)
Brightest Comet of 2018
Comet 46P/Wirtanen will grace the night sky in December 2018. Find when, how, and where to see the brightest comet of the year with your naked eyes.