It's the last--and the smallest--of the full moons of 2013. It's called the Cold Moon, or the Long Night Moon, appearing so close to the Winter Solstice. But I will call it the Christmas Moon.
That doesn't mean this picture is accurate for this year. No, Santa will fly his sleigh under a full moon on Christmas Eve only about every nineteen years. This year he'll be out in the light of a waning gibbous moon. But we can save this picture and use it in 2015--there will be a full moon on December 25 that year.
But this one fits. One could almost imagine it's the night of the full moon in December, 2013, and the world is calm and peaceful and bright, and excitedly anticipating the celebration of the birth of Light.