The Start of Astronomical Winter

“Dec. 21 (UPI) -- The start of Winter arrived today as the Northern Hemisphere officially entered the year's coldest season. The start of the season is marked by the winter solstice, which brings the shortest day and longest night of the calendar year. It is at this point that the Northern Hemisphere is tilted farthest from the sun.”

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Historical and cultural significance of Winter Solstice

"For astronomers, the day has been one of immense value since the Neolithic age, also called the New Stone Age, the timespan which was the final stage of cultural evolution and technological development for our prehistoric ancestors.

In 2021, the northern hemisphere is expected to get only 8 hours and 46 minutes of daylight.
On the night of December 2021, the north pole will be furthest from the sun.”

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I got the clock in the above photo at the Faberge Museum in St Petersburg, Russia. Beautifully enameled and detailed, it is a replica of a famous one belonging to the royal family.