The Full Cold Moon rises on December 3, 2017! It’s a “Supermoon”—appearing bigger and brighter than any Moon this year. Learn more about December’s full Moon!
The 2017 Supermoon
December brings what’s popularly called a “Supermoon” or what astronomers call a “perigee full Moon.”
Specifically, the Full Moon crests on the evening of Sunday, December 3 and reaches “perigee“—the point in its orbit at which it is closest to Earth—early morning of Monday, December 4.
When a Full Moon rises at perigee, the Moon appears bigger and brighter. This Sunday’s full Moon is expected to appear 8% wider and 16% brighter than average.
Almanac astronomer Bob Berman debates whether you can truly see the difference in “What is a Supermoon: Fact or Fiction,” but we’ll let you be the judge! We simply admire its beauty, shining down on our seasonal landscape.
While December’s Supermoon is the only one in 2017, it’s the first of three Supermoons in succession. The next two are in January (2018)—which brings two full Moons! Yes, that second Moon in a single month is considered a “Blue Moon.”
Moon Phases for December 2017
All dates and times are ET. See the Moon Phase Calendar for your city/state.
|Full Moon: December 3, 10:47 A.M.|
|Last Quarter: December 10, 2:51 A.M.|
||New Moon: December 18, 1:30 A.M.|
||First Quarter: December 26, 4:20 A.M.|
When is the next Full Moon? See our Full Moon Dates chart.
December Full Moon Names
In Native American cultures which tracked the calendar by the Moons, December’s Full Moon was known as the Full Cold Moon. It is fittingly associated with the month when the winter cold fastens its grip and the nights become long and dark.
This Full Moon is also called the Long Nights Moon by some Native American tribes because it occurs near the winter solstice—the day with the least amount of daylight.
See a full calendar year of full Moon names and their meanings.
Best Days in December 2017
Below are the best days for activities, based on the Moon’s sign and phase in December.
- Aboveground crops: 1, 2, 28, 29
- Belowground crops: 9, 10
For Setting Eggs:
- 2–4, 11, 29–31
- 1-3, 18–31
- If a snowstorm begins when the Moon is young, it will cease at moonrise.
Share your thoughts about this month’s Moon below!