Event: First Day of Winter (also called the Winter Solstice)
Date: December 21
Location: Everywhere in the Northern hemisphere; in the Southern hemisphere, the first day of winter happens in June.
What to do: Many civilizations, both ancient and current, mark the first day of winter with holidays or festivals. On this shortest day of the year (at least for those of us in the Northern hemisphere), we celebrate the return to light, as we gain a few minutes of sunshine every day from now until the summer solstice in June.
For more information: About's Guide to Geography explains the Winter Solstice.
See all December events.