Full Moon Day In December 2025. The full moon in december 2025 occurred on december 15, 2025. The december full moon in 2025 will be on sunday december 15, 2025 4:02 am est or 9:02 am utc based on the data provided by nasa.

The december full moon, known as the cold moon, will take place on sunday, december 15. 14 during the peak of the geminid meteor shower.