GOLDEN VALLEY, Minn. - Friday marks the winter solstice, the official start of winter.
The Winter Solstice is just a minute in time that happens at the same time for everyone north of the equator and it's all about the earth's 23.5 degree tilt.
Here's how it works. On the morning of Dec. 21 at 5:12 central time the north pole is tilted furthest away from the sun. That gives us our shortest day and longest night of the year.
For the northern hemisphere, the tilt makes noon-hour shadows their longest.
In the Arctic Circle, people experience 24 hours without any sunlight at all.
On Saturday, we start the climb back to the summer and our days get longer.
According to timeanddate.com, Saturday will be three seconds longer than Friday.
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