Although temperatures have been dropping for weeks, winter doesn’t officially begin until Saturday. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content.

The winter solstice—a day many hear about, but may not completely understand. Most people know it’s the shortest day of the year, but they may not know the science behind it. Why does it happen, ...

On Sunday, Dec. 21, at exactly 10:03 a.m. EST, the Northern Hemisphere's astronomical winter officially begins with the winter solstice. That's the moment when the Northern Hemisphere is tilted ...

(CNN) — Since the summer solstice back in June, the days have grown steadily shorter and the nights have grown steadily longer in the Northern Hemisphere. But that’s about to reverse itself. Winter ...

Though temperatures have already started to drop in some parts of the country, winter doesn't officially begin until mid-December. Here's what to know about the winter solstice, the astronomical start ...