It is December 21, 2016 and that means it is Winter Solstice.
Winter solstice is the day with the fewest hours of sunlight during the whole year.
According to the Farmer's Almanac...
"The word solstice comes from the Latin words for “sun” and “to stand still.”
In the Northern Hemisphere, as summer advances to winter, the points
on the horizon where the Sun rises and sets advance southward each day; the
high point in the Sun’s daily path across the sky, which occurs
at local noon, also moves southward each day.
At the winter solstice, the Sun’s path has reached its southernmost position.
The next day, the path will advance northward. However, a few
days before and after the winter solstice, the change is so slight that
the Sun’s path seems to stay the same, or stand still. The Sun is
directly overhead at “high-noon” on Winter Solstice at the latitude
called the Tropic of Capricorn."
Read More About Winter Solstice at the following links: