December 21 - Winter Solstice

Winter Solstice - The precise moment when the Sun passes directly over the Tropic of Capricorn today at 17:47UTC, winter will officially begin. This is commonly know as the shortest day of the year, and the start of when days will gradually begin to lengthen.

Traditionally the winter solstice is cause for celebration, and many cultures will plan festivals, holidays and rituals to mark the occasion.