The full moon in December is particularly remarkable. Here's how to observe it.

As 2025 comes to a close, the year ends with its last full moon, set to peak on December 4. This year, the full moon is even more remarkable because it is a supermoon, occurring when the moon is at or near its closest approach to Earth while fully illuminated. During a supermoon, the moon can appear up to 14% larger and roughly 30% brighter than usual.

Interestingly, this is the third consecutive supermoon of the year, following similar events in October and November.

When and Where to View

The December full moon will rise on December 4 at 4:14 a.m. Arizona time. Often called the Cold Moon, this full moon aligns with the chilly conditions commonly experienced in many regions around this time of year.

Why Decembers Moon is Unique

This December full moon holds special significance as it coincides with the winter solstice, when the Northern Hemisphere leans farthest from the sun. This creates the years longest night and shortest day, earning it the nickname Long Night Moon in some cultures.

For stargazing enthusiasts, this full moon marks an ideal opportunity to witness a bright, oversized lunar display before the new year begins.

Analysis of the December Supermoon: A Rare Celestial Event

The final full moon of 2025, scheduled to peak on December 4, is a standout astronomical event, primarily due to its status as a supermoon. This occurrence—when the moon is at or near its closest approach to Earth—results in a moon that appears up to 14% larger and 30% brighter than typical full moons. The fact that this is the third consecutive supermoon in 2025 adds even more intrigue to the event, drawing attention from both casual observers and dedicated stargazers alike.

From a timing perspective, the December full moon holds additional significance. It will coincide with the winter solstice, a pivotal moment in the astronomical calendar. This alignment means that in the Northern Hemisphere, the moon will appear at its fullest during the longest night of the year, a phenomenon that has earned it the nickname "Long Night Moon" in various cultures. This dual significance—both as a supermoon and as a marker of the solstice—makes it a truly exceptional sight.

For those looking to catch a glimpse of this spectacle, the full moon will rise at 4:14 a.m. Arizona time. In many parts of the world, this event offers a rare opportunity to see a supermoon in a crisp, winter setting, providing a fitting and visually striking end to the year. As 2025 comes to a close, this supermoon serves as a reminder of the ongoing celestial wonders that continue to captivate us.

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• December's full moon is extra special. Here's how to see it.