Topline
The full cold moon — the third and final of fall in the Northern Hemisphere — will turn full on Thursday, Dec. 4, 2025. Named for the chilly temperatures at this time of year in North America, this moon is not only the second-biggest…

The full cold moon — the third and final of fall in the Northern Hemisphere — will turn full on Thursday, Dec. 4, 2025. Named for the chilly temperatures at this time of year in North America, this moon is not only the second-biggest…