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Astronomical winter begins at the winter solstice, which is the shortest day of the year. This means days get longer during winter—very slowly at first, but at ever-larger daily intervals as the March equinox approaches, heralding the start of spring.
Shortest Day in the North. Since the Northern Hemisphere is tilted away from the Sun in December, it receives less sunlight during the course of a day. At the solstice, the North Pole's tilt away from the Sun is greatest, so this event marks the shortest day of the year north of the equator.
The shortest day can occur on December 20, 21, 22, or 23. However, as you can see below the 21st is by far the most common. A December solstice on the 23rd is once in a hundred years occurrence, and a December 20 solstice is even rarer.
In 2024, the December solstice falls at 9:21 UTC on December 21 (3:21 a.m. CST on December 21). Note: For us in the Northern Hemisphere, the December solstice will mark the longest nights and...
For that hemisphere, the winter solstice is the day with the shortest period of daylight and longest night of the year, and when the Sun is at its lowest daily maximum elevation in the sky. [1] Each polar region experiences continuous darkness or twilight around its winter solstice.
Learn all about the shortest day of the year—and tell us what winter means to you! When Is the Winter Solstice? The first day of winter in the Northern Hemisphere is marked by the winter solstice, which occurs on Saturday, December 21, 2024, at 4:21 A.M. ( EST ).
Winter solstice is the shortest day of year, longest night of the year and the official first day of winter in the Northern Hemisphere. Find out about the science and traditions behind the...