The December 2025 Full Moon will be on Thursday, December 4, 2025 at 6:14 PM EST. It will be the last full moon of 2025.
A full moon occurs when the Earth is between the Sun and the Moon, so the moon looks completely illuminated. It happens about once a month or 29.53 days on average, also called a synodic month.
Ready to dive a little deeper into the December Full Moon of 2025? Learn more about the moon’s nicknames and other facts about it.
Get ready for December 2025’s Full Cold Moon
The full moon in December 2025 is on Thursday, December 4. The December full moon will be the twelfth and last full moon of the year.
The December 4 full moon will be the last full moon of Autumn as the last full moon after the Autumnal Equinox. Depending on the year, the December Full Moon can either be the last full moon of Autumn or occur just after the start of Winter.
When is the December Full Moon in 2025?
The peak of the Full December Moon will be at 6:14 p.m. EST on December 4th. The moon will look fairly full the day before and after. The December 4 Full Moon will be the full moon in Gemini.
Names for the December Full Moon
The December full moon is commonly called the Full Cold Moon, which is unsurprising as the temperatures get colder with the official start of Winter.
Other nicknames for the December Full Moon are the Long Nights Moon and the Oak Moon.
Will there be a Lunar Eclipse in December?
No, there will not be a lunar eclipse in December 2025. March and September will each have a Total Lunar Eclipse, also called a Blood Moon.
Will there a full supermoon in December?
Yes, the December Full Moon will be the last of the three supermoons in 2025. October and November will also be supermoons.
A full supermoon is a full moon that nearly coincides with the closest point at which the Moon comes to Earth in its orbit, called perigee. The moon will have a larger-than-usual appearance. There isn’t an official definition of the exact distance the moon needs to be to be called a supermoon. It’s approximately 360,000 kilometers or closer, depending on the definition.
Will December be a blue moon?
No, there will not be a blue moon in December, nor any other month in 2025. There was a seasonal blue moon in 2024 and there will be a blue moon in 2026 with a second full moon in May.
There are two definitions of blue moons. The most common, and the one you likely know, is when two full moons occur in the same month. The second full moon is typically called a blue moon.
The second definition relates to having an extra full moon on the calendar during a season. When a season has four full moons, the third full moon is also called a blue moon or a seasonal blue moon.
Moon Phases for the December Full Moon
Below are the four core moon phases for the December Full Moon, including the new moon, first quarter, full moon, and last quarter. The lunar cycle for the Full Moon began in November and ended in December.
| Moon Phase | Date & Time | Season |
|---|---|---|
| New Moon | Thu, November 20, 1:47 a.m. | Autumn |
| First Quarter | Fri, November 28, 1:59 a.m. | Autumn |
| Full Moon | Thu, December 4, 6:14 p.m. | Autumn |
| Last Quarter | Thu, December 11, 3:52 p.m. | Autumn |
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Sources
The dates and times provided by NASA are set to United States (USA) Eastern Time for states including New York and Florida, adjusted for Daylight Saving Time for part of the year. Since you may be in a different time zone, the exact dates may shift for your calendar.