The Winter Solstice explained in laymans terms

The Winter Solstice is an Astronomical event occurring in December every year when Sun s elevation with respect to Earth reaches its lowest value (25. 5 degrees). It is accompanied by the longest day on South Pole and the longest night on North Pole of Earth. In 2013, it occurs at 17:11 UTC on December When it is Winter Solstice in the Northern Hemisphere, it is the summer solstice in the Southern Hemisphere. For the Northern Hemisphere, at the moment of winter solstice, the sun is at its greatest