The “Cold Moon” is the Northeast Native American name for the December full moon. It means the time when the cold sets in for winter.
In New York City the first snow usually falls around the first week of December. January is the coldest month and February is the snowiest. So the cold moon marks the beginning of wintertime in New York City.
The 2021 Cold Moon
In 2021, the cold moon full moon reaches maximum on Saturday, December 18, 2021 at 9:37pm ET.