Winter solstice is the shortest day in the Northern Hemisphere. Discover the science of why it happens, its ancient pagan traditions and a delightful skytime bonus for 2020.

The Dongzhi Winter Solstice Festival has its roots in ancient Chinese culture. The name translates roughly as "extreme of winter." They thought this was the apex of yin (from Chinese medicine theory).

Winter solstice 2021 will be on December 21. Find out why the Northern Hemisphere has its shortest day at this time and how people have celebrated for thousands of years.

Winter solstice 2021, the shortest day of year and the official first day of winter, is on Tuesday. How it all works has fascinated people for thousands of years. First, we'll look at the science ...

(CNN) -- For six months now, the days have grown shorter and the nights have grown longer in the Northern Hemisphere -- but that's about to reverse itself. Winter solstice, the shortest day of ...

Winter solstice 2020, the shortest day of year and the official start of winter, is on Monday, December 21. How it all works has fascinated people for thousands of years.

For six months, the days have grown shorter and the nights have grown longer in the Northern Hemisphere. But that's about to reverse itself.

For six months, the days have grown shorter and the nights have grown longer in the Northern Hemisphere. But that’s about to reverse itself. Winter solstice 2020, the shortest day of year and ...

Winter solstice 2020, the shortest day of year and the official start of winter, is on Monday, December 21. How it all works has fascinated people for thousands of years.