The full moon in December 2025 occurs on Thursday, December 4, with the moment of full illumination at 23:14 UTC.

Quick Scoop

  • The December full moon is traditionally called the Cold Moon, reflecting the onset of winter temperatures in the Northern Hemisphere.
  • In 2025, it is also classed as a supermoon, appearing slightly larger and brighter than an average full moon.
  • The moon will look essentially full for about one day before and after December 4, so it will appear full from roughly December 3–5 depending on your location.

Key timing details

  • Exact full moon time: December 4, 2025 at 23:14 UTC.
  • This corresponds to about 6:14 p.m. EST in North America.
  • It is the last full moon of the year 2025 and the last full moon of the autumn season that year.

Information gathered from public forums or data available on the internet and portrayed here.