The winter solstice, also known as the hibernal solstice, happens when either one of our planet’s poles reaches its maximum tilt away from the Sun. This happens twice every year, once for the ...

The exact moment of the winter solstice varies from year to year due to a slight misalignment between the Gregorian calendar and the actual rate of the Earth’s rotation around the sun.

Summary: The summer solstice marks the longest day of the year and the winter solstice the longest night. This assembly is particularly suitable on, or near, the summer solstice - usually 21 June.

Here's when winter officially starts, when and what the winter solstice is, when we fall back and what to know about the ...