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The winter solstice marks the shortest day of the year in the northern hemisphere.

Earth's seasons are caused by its axial tilt, not its distance from the sun.

Following the winter solstice, daylight hours gradually increase until the summer solstice in June.

If you're not even off work yet and it's dark outside, the winter solstice is to blame.

The winter solstice is the shortest day of the year with the least amount of sunlight. In Earth's northern hemisphere, it happens annually on Dec. 21 or 22. The good news is that, after the winter solstice, every day gets a little longer through June.

It's a common misconception that Earth's seasons are caused by its distance from the sun, but Earth is actually closest to the sun in December and January and furthest from i

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