Moon Phase Calendar 2026: Full Moons, New Moons & Lunar Cycles

The Lunar Calendar for 2026

The Moon completes a full orbit around Earth in approximately 29.53 days — the synodic period, measured from one new moon to the next. This means the Moon doesn't align neatly with our 30- and 31-day calendar months, which is why full moon dates drift backward through the calendar by about a day each month.

In 2026, there are 12 full moons, one in each calendar month. Each lunation passes through eight distinct phases in a cycle that humans have tracked for at least 25,000 years — tally marks on prehistoric bone fragments found in Europe appear to be lunar phase records, making the Moon the oldest "calendar" our species has ever used.

You can track today's moon phase and all upcoming phases in real time using our moon phase calendar.

The Eight Moon Phases Explained

A common confusion: when people say "half moon," they usually mean the first or last quarter. The terminology is counterintuitive — "quarter" refers to the Moon being a quarter of the way (or three-quarters) through its orbit, not to how much of its face is illuminated. At a "quarter" phase, exactly half the visible disk is lit.

Another thing that trips people up: the phases look different depending on your hemisphere. In the Northern Hemisphere, the Moon waxes from right to left (the illuminated crescent starts on the right). In the Southern Hemisphere, it waxes from left to right. If you've ever looked at a photo of the Moon and something felt "off," the photographer may have been in the opposite hemisphere.

Why the Moon Shows the Same Face

The Moon rotates on its axis at exactly the same rate it orbits Earth — once every 27.3 days. This synchronization, called tidal locking, means we always see the same side. It's not a coincidence: Earth's gravity gradually slowed the Moon's rotation over billions of years until it locked into sync. The "dark side of the Moon" is actually better called the "far side" — it gets just as much sunlight as the near side, we just never see it from Earth.

We do see a bit more than 50% of the Moon's surface over time, though. The Moon wobbles slightly as it orbits (an effect called libration), which lets us peek around the edges. Over the course of a full orbit, we can see about 59% of the total surface.

Traditional Full Moon Names

Many cultures have given full moons names based on seasonal phenomena. The names most commonly cited in North America derive from Algonquin, Colonial American, and European traditions. The Old Farmer's Almanac popularized these names in the 20th century, though their origins go back much further:

• January: Wolf Moon — named for the howling of wolf packs in the deep of winter, heard by early settlers
• February: Snow Moon — typically the month of heaviest snowfall across the northern states
• March: Worm Moon — earthworms appear as the ground thaws. Some sources call it the Sap Moon (maple sap starts flowing)
• April: Pink Moon — named for wild ground phlox (Phlox subulata), one of the first spring wildflowers, not for the moon's color
• May: Flower Moon — flowers bloom abundantly across most of the northern hemisphere
• June: Strawberry Moon — the short harvesting season for wild strawberries. In Europe, this was the Rose Moon or Mead Moon
• July: Buck Moon — male deer (bucks) grow new antlers at this time of year. Also called the Thunder Moon in some regions
• August: Sturgeon Moon — Great Lakes fishing tribes caught sturgeon most easily in August. Also called the Green Corn Moon
• September: Harvest Moon — the full moon closest to the autumn equinox. Its early evening rise provided light for farmers harvesting late crops
• October: Hunter's Moon — following the harvest, hunters used moonlight to track prey fattening for winter
• November: Beaver Moon — beavers build winter dams, and trappers set traps before waterways froze
• December: Cold Moon — the long, dark nights of midwinter. The Mohawk called it the "Moon of Long Nights"

Other cultures have their own naming traditions. In Hindu calendars, each lunar month has a Sanskrit name (Chaitra, Vaishakha, Jyeshtha, etc.). In Chinese tradition, the Mid-Autumn Festival celebrates the full moon of the 8th lunar month. Islamic months begin with the first sighting of the crescent moon, making the new moon rather than the full moon the key calendrical event.

What Is a Supermoon?

A supermoon occurs when a full moon coincides with the Moon being near its perigee — the closest point in its elliptical orbit around Earth. At perigee, the Moon is about 356,500 km away; at apogee (farthest point), it's about 406,700 km away. That 14% difference in distance translates to the Moon appearing about 14% larger and 30% brighter at perigee compared to apogee.

The term "supermoon" was coined by astrologer Richard Nolle in 1979 — not an astronomer, an astrologer, which is why some scientists bristle at the term. The technical definition (Nolle's original) is a new or full moon that occurs within 90% of its closest approach to Earth. Most years have 3–4 full moons that qualify.

Honestly? The visual difference is subtle. A 14% size increase is noticeable if you compare photographs side by side, but most people couldn't identify a supermoon versus a regular full moon without a reference point. What makes supermoons look truly spectacular is usually the "Moon illusion" — the optical illusion that makes the Moon appear enormous when it's near the horizon, regardless of whether it's at perigee or not. A supermoon rising over a city skyline looks jaw-dropping, but most of that visual drama is the horizon illusion, not the extra 14%.

What Is a Blue Moon?

A "blue moon" has two competing definitions, and the more popular one is actually the result of a misinterpretation:

1. Calendar blue moon (modern definition): The second full moon in a single calendar month. Because the lunar cycle is 29.53 days and most months are 30–31 days, occasionally two full moons squeeze into one month. This happens roughly every 2.5 years.
2. Seasonal blue moon (original definition): The third full moon in an astronomical season (spring, summer, fall, winter) that contains four full moons instead of the usual three. This older definition was misinterpreted in a 1946 Sky & Telescope article, which introduced the "second full moon in a month" definition that stuck.

The Moon doesn't actually turn blue. (Well, almost never. Volcanic eruptions that inject particulates into the upper atmosphere can scatter red wavelengths and create a genuinely blue-tinted Moon, as reportedly happened after the Krakatoa eruption in 1883. But that's exceedingly rare and has nothing to do with the "blue moon" of the calendar.)

Lunar Eclipses and 2026

Lunar eclipses happen when the Earth passes between the Sun and the Moon, casting its shadow on the Moon's surface. They can only occur during a full moon, but they don't happen every month because the Moon's orbit is tilted about 5° relative to Earth's orbit around the Sun. The Moon usually passes above or below Earth's shadow.

A total lunar eclipse — when the Moon passes fully into Earth's umbral shadow — produces the dramatic "blood moon" effect. The Moon turns a deep copper-red because Earth's atmosphere bends some sunlight into the shadow, filtering out the blue wavelengths and letting only the red through. It's the same physics that makes sunsets red, except projected onto the Moon.

Whether 2026 features a notable lunar eclipse depends on the specific alignment geometry. Partial and penumbral eclipses are more common than total ones, and penumbral eclipses are so subtle that most people don't notice them — the Moon just dims slightly, like someone turned down a dimmer switch by 10%.

The Moon and Agriculture

Biodynamic agriculture and many traditional farming practices align planting, harvesting, and pruning with lunar phases. The idea is ancient — Pliny the Elder wrote about lunar planting schedules in the 1st century AD, and the practice appears in farming traditions from every inhabited continent.

The scientific evidence is mixed. The Moon's gravitational influence creates ocean tides and very subtle fluctuations in soil moisture, but these effects on soil are tiny compared to the influence of rain, irrigation, and soil type. Controlled studies on whether lunar planting actually improves crop yields have produced contradictory results — some show small positive effects, others show none.

What the Moon indisputably does is provide nighttime illumination. Before artificial lighting, the full moon's light was genuinely useful for farmwork, fishing, and travel. The Harvest Moon is named for exactly this reason — its early evening rise in September gave farmers extra hours to bring in crops before frost. Even today, the full moon provides enough light (about 0.3 lux) to walk safely outdoors without a flashlight.

Photographing the Moon

The Moon is one of the most photographed objects in the sky, and it's also one of the most commonly botched. The classic mistake is taking a wide-angle photo of the Moon and ending up with a tiny, overexposed white dot. Here's what works:

• Use a telephoto lens — 200mm minimum, 400mm+ preferred. The Moon is smaller in the frame than you think. A 600mm lens on a crop sensor gives you a frame-filling Moon image.
• Follow the "Looney 11" rule — for a well-exposed full Moon, use f/11, ISO 100, and a shutter speed of 1/100 to 1/200 second. The Moon is sunlit, so it's much brighter than your camera's meter expects.
• Shoot the crescent for drama — a thin crescent Moon with earthshine (the faint illumination of the dark portion by sunlight reflected off Earth) makes a more interesting photo than a flat, fully-lit full Moon.
• Combine with foreground — the most compelling Moon photos include a landscape, building, or silhouette in the foreground. This often requires compositing (shooting the foreground and Moon separately) or very careful planning with telephoto compression to make the Moon appear large against a distant subject.

Moon Phase Calculation Methodology

Our moon phase data is calculated using the standard astronomical algorithm based on the Moon's synodic period of 29.530589 days, with a reference new moon of January 6, 2000, 18:14 UTC. The calculation accounts for the Moon's elliptical orbit, orbital inclination, and perturbations from the Sun's gravity, giving phase angles accurate to within a fraction of a degree. For most practical purposes — knowing whether tonight's Moon is waxing or waning, or when the next full Moon falls — this precision is more than sufficient.

Frequently Asked Questions

How long is a lunar cycle?

A complete lunar cycle (synodic period) takes approximately 29.53 days, measured from one new moon to the next. This is why lunar months do not align perfectly with calendar months, and why full moon dates shift by about one day earlier each calendar month.

How many full moons are there in 2026?

There are 12 full moons in 2026, one in each calendar month. In years where the lunar cycle aligns differently, there can be 13 full moons, with one month containing two full moons (the second being called a "blue moon").

What is a supermoon?

A supermoon occurs when a full moon coincides with the Moon's perigee — its closest point to Earth in its elliptical orbit. A supermoon can appear up to 14% larger and 30% brighter than a full moon at apogee (farthest point). Most years have 3-4 supermoons.

What is a blue moon?

A blue moon has two definitions: the second full moon in a single calendar month (the more common usage), or the third full moon in a season that has four full moons. Blue moons occur approximately once every 2.5 years. The Moon does not actually appear blue.

What are the eight phases of the Moon?

The eight lunar phases are: new moon (0% illuminated), waxing crescent, first quarter (50% right side lit), waxing gibbous, full moon (100% illuminated), waning gibbous, last quarter (50% left side lit), and waning crescent. The cycle repeats every 29.53 days.

Why does the Moon look different each night?

The Moon's appearance changes nightly because its position relative to the Sun and Earth shifts as it orbits. The illuminated portion we see depends on the angle between the Sun, Moon, and Earth. As the Moon orbits, different amounts of its sunlit side face Earth, creating the phases.

What is the Harvest Moon?

The Harvest Moon is the full moon closest to the autumn equinox (around September 22-23 in the Northern Hemisphere). It rises near sunset for several consecutive nights, which historically gave farmers extra evening light to harvest crops. It can occur in either September or October depending on the year.

Sources

• NASA: Moon Phases (moon.nasa.gov)
• US Naval Observatory: Phases of the Moon (aa.usno.navy.mil)
• Meeus, Jean (1998). Astronomical Algorithms, 2nd ed. Willmann-Bell.
• Nolle, Richard (1979). "Supermoon." Dell Horoscope Magazine.