When and where to see the Cold Moon, the longest and last full moon of 2023

The longest — and last — full moon of the year will appear on Monday night and peak on Tuesday.

December's full moon, also known as the Cold Moon and Long Night Moon, will reach peak illumination at 7:33 p.m. ET on Tuesday, according to NASA. It will look like a full moon until Thursday morning. The Old Farmer's Almanac details specific moonrise times for different ZIP codes across the United States. 

To view a full moon, NASA recommends going outside and looking up at the sky. Using a telescope or binoculars will magnify the moon and clarify details on its surface.