Corn Moon - Full Moon of September

Corn Moon: Quick Facts

The Full Corn Moon is September's full Moon — the one that traditionally lights the last stretch of the North American corn harvest. In most years it also earns the title Harvest Moon, since it usually falls closer to the autumnal equinox than any other full Moon.

When it happens	Once a year, sometime in September — the exact date and time shift from year to year (see below)
Also called	Harvest Moon (most years), Corn Maker Moon, Corn Harvest Moon, Barley Moon, Wine Moon, Singing Moon, Falling Leaves Moon, Nut Moon, Snow Goose Moon
Typical part of the sky	Generally among the stars of Pisces or a neighboring constellation, though the exact backdrop shifts slightly year to year
Why it's sometimes the "Harvest Moon"	Whichever full Moon falls closest to the autumnal equinox (around September 22–23) takes that title — most years, that's the Corn Moon; roughly one year in three, it's October's full Moon instead
Supermoon?	Depends on the year. It's a supermoon only when it happens to fall near perigee (the Moon's closest approach to Earth) — check the current year's calendar for specifics
Lunar/solar eclipse?	Occasionally. Eclipses only accompany a full Moon a few times a year, so most Corn Moons pass without one — check an up-to-date eclipse calendar for the current year
Signature trick	Near the equinox, the usual ~50-minute nightly moonrise delay shrinks to roughly 25–35 minutes for several nights running — the classic "Harvest Moon effect" (see below)
First full Moon of autumn?	Only in years when it falls after the autumnal equinox. If it falls before the equinox, that title goes to October's full Moon instead

September's Names

The "Corn Moon" takes its name from the late-summer corn harvest that ripens across much of North America right around this full Moon. It's one of the best-known traditional names recorded from several Indigenous peoples of North America, many of whom used their own seasonal name tied directly to the corn crop reaching maturity. Because the Corn Moon usually — though not every year — also falls closest to the equinox, it frequently doubles as the Harvest Moon, a title tied to the sky rather than to any one crop. September's full Moon is also known by several other names:

Corn Maker Moon & Corn Harvest Moon The Western Abenaki called it the Corn Maker Moon, while the Dakota knew it as the Corn Harvest Moon — both marking the point when corn stood ready for gathering before the first hard frost could spoil it.
Barley Moon & Wine Moon European folk names for September's full Moon, marking the barley harvest and the start of the grape harvest in wine-growing regions — both races against the first frosts and cooling days of early autumn.
Falling Leaves Moon & Nut Moon Names used by various nations for the season's first turning leaves and the ripening of nuts like hickory and walnut — both quiet signs that summer's growth is giving way to autumn's slowdown.

Is the Corn Moon the Same as the Harvest Moon?

Not always. "Harvest Moon" isn't tied to a calendar month; it's simply whichever full Moon falls closest to the autumnal equinox, which is most often in September but lands in October roughly one year in three. Whenever the equinox sits closer to September's full Moon than to October's, the Corn Moon is the Harvest Moon that year.

Why the Date Moves

Because the lunar cycle runs about 29.5 days, it doesn't line up evenly with a 365-day calendar year — so the Corn Moon's date drifts roughly 11 days earlier from one year to the next.

Early in the cycle The Corn Moon can fall as early as the first day or two of September.
Late in the cycle It can fall as late as the very end of September.
Reset point Every few years, an extra full Moon (a Blue Moon) slips in during summer and resets the drift, starting the pattern over.

Want This Year's Exact Date? Because the date and peak time change every year, check a current Moon phase calendar for this year's precise Corn Moon date and time in your time zone.

Peak illumination is usually a specific moment during the day, but what most people notice is moonrise the evening before and the evening of the peak — the Moon looks essentially full at moonrise on both nights.

SIGNATURE EVENT

What Makes a Corn Moon a Harvest Moon?

Timing, not appearance. Every full Moon looks essentially the same — full is full — but the Harvest Moon title goes to whichever full Moon falls nearest the autumnal equinox. In years when September's full Moon lands closer to the equinox than October's does, the Corn Moon takes the title. The Harvest Moon can also occasionally coincide with a lunar eclipse, though that's the exception rather than the rule — check a current eclipse calendar if that's relevant to a given year. Either way, the Harvest Moon brings its own quieter phenomenon worth watching for.

Moonrise Times (General Pattern)

Period	Typical Nightly Delay	Notes
Most of the year	~50 minutes later each night	The usual pace of moonrise slipping later
Nights around the Harvest Moon	~25–35 minutes later	Shrinks gradually into and out of the peak — not a sudden switch
Following week	Returns toward ~50 min	Effect fades as the Moon moves away from full

Around the Harvest Moon each year, the nightly delay shrinks from the more typical ~50 minutes to roughly 25–35 minutes across many northern locations — the shift is gradual, not something that begins or ends on a single night. Exact values vary by location and are strongest between about 40–60°N latitude, weakening toward the equator.

Why Moonrise Barely Slows Down

Normally the Moon rises about 50 minutes later each night as it moves along its orbit. But near the autumnal equinox, the Moon's path across the sky meets the horizon at an unusually shallow angle, so each night's rising point requires less time to catch up — shrinking the delay to roughly 25–35 minutes for several nights in a row, most noticeably between about 40–60°N latitude.

Why it mattered historically: That shorter gap meant several evenings in a row of bright moonlight arriving right at dusk — extra light farmers once used to keep working the fields past sunset during the final push of the harvest, which is how the name stuck.

No special equipment or timing is required to see this — just step outside at sunset on any of the nights around the Harvest Moon and watch it rise nearly full, night after night, with barely any lag.

Corn Moon Meaning and Folklore

Where August's Sturgeon Moon marks summer's last full stretch, the Corn Moon signals the turn into autumn proper — rising over fields heavy with ripe corn, vineyards ready for picking, and the first cool nights after a long, hot season. Here are six stories that capture its character. Note: "Corn Moon," like all full Moon names, is a traditional seasonal label — it doesn't reflect any physical change in the Moon itself.

The Corn Maker Moon

Recorded Among the Western Abenaki

Among the Western Abenaki, September's full Moon was recorded as the Corn Maker Moon — the point in the year when corn, planted and tended since spring, finally stood ready for the harvest. Corn was a staple crop and a central part of seasonal life for many nations, and this name marked the culmination of that year-long relationship between the community and the field.

Corn Harvest Under a Bright Sky

Recorded Among the Dakota – Corn Harvest Moon

The Dakota name, Corn Harvest Moon, reflects a season felt across many different farming and gathering nations, each with their own naming traditions: the crop was ready, and the weather would not stay favorable forever. Communities gathered corn ahead of the first frosts, using the long evening light of the near-full Moon to extend the working day.

The Barley Moon & Wine Moon

European Folk Tradition

Across Europe, September's full Moon lit fields of barley ready for cutting, giving rise to the Barley Moon. In wine-growing regions further south, the same Moon coincided with the start of the grape harvest, earning it the name Wine Moon — a reminder that the "harvest" this Moon oversees was never just one crop, but whatever the local land was giving up at that moment.

Falling Leaves & Ripening Nuts

Various Traditions – Falling Leaves Moon & Nut Moon

Some nations named September's full Moon for what was happening in the forest rather than the field: the first leaves beginning to turn and drop, and nuts like hickory and walnut ripening on the branch. Together these names track the same quiet shift — summer's green fullness giving way to autumn's color and slowdown.

The Singing Moon & Snow Goose Moon

Regional Folklore

The Singing Moon is a traditional regional name whose exact origin is uncertain — some writers associate it with the last insect choruses of late summer, though there's no firm primary source confirming that explanation. The Snow Goose Moon is more straightforward: September is when the first flocks of snow geese begin their long southward migration, an early signal that winter is on its way.

The Harvest Moon

Cross-Cultural Tradition

Unlike the other names on this list, "Harvest Moon" isn't tied to September specifically — it's an astronomical title given each year to whichever full Moon falls closest to the autumnal equinox. Most years that's the Corn Moon, but roughly one year in three the title shifts to October instead, making it one of the only full Moon names that moves between months.

Science & The Corn Moon

The Equinox Sets the Title

The autumnal equinox falls around September 22–23 each year — the moment the Sun crosses the celestial equator and day and night are roughly equal. Whichever full Moon lands closest to that date, before or after, earns the Harvest Moon title. In years when September's full Moon lands nearer the equinox than October's does, the Corn Moon takes the title rather than October's full Moon.

Sometimes Super, Sometimes Micro

Whether a given year's Corn Moon counts as a supermoon or a micromoon depends on how close it falls to perigee (the Moon's nearest point to Earth) or apogee (its farthest point). Most years it's neither — just a Moon of fairly average apparent size and brightness — but check the current year's calendar to know for sure. Either way, the real spectacle this month is usually the moonrise timing, not the distance.

International Observe the Moon Night

NASA holds its annual Observe the Moon Night each September or October, usually around the first-quarter phase, ahead of that month's full Moon. It's a good excuse to get outside with a telescope or binoculars beforehand and see craters and terrain detail that gets washed out once the Moon turns fully illuminated.

Viewing the Corn Moon

🌽 Best viewed at moonrise, the evenings just before and on the day of full illumination

Watch It Rise Two or Three Nights Running Because peak illumination usually falls at a specific hour rather than exactly at sunset, the Moon typically looks essentially full at moonrise on the evening before and the evening of the peak — an easy way to enjoy the Harvest Moon effect without needing to be precise about the exact moment of peak fullness.
No Equipment Required A full Moon is easily bright enough to see and enjoy with the naked eye. Binoculars can sharpen craters and maria along the terminator in the days just before or after full — because at full Moon the Sun shines nearly straight down on the lunar surface, flattening shadows and hiding relief that's easier to see when sunlight hits at an angle — but equipment isn't necessary for the main event.
Look for the Amber Horizon Glow Like any Moon near the horizon, the Corn Moon often takes on a warm amber or orange tint as its light passes through more of Earth's atmosphere — a striking effect for photos even without any special conditions.
Time the Rise, Not the Peak Peak illumination often lands during daylight hours, so it's rarely worth waiting around for that exact moment — plan instead to be outside at sunset on the evenings surrounding the peak to catch moonrise, which is when the Moon will actually be visible and near-full.

"The Corn Moon doesn't announce itself with fanfare — it simply keeps rising, night after night, almost exactly where it left off, lighting the last work of the harvest."

A Year of Moons: Names & Meanings

Every full moon spins its own seasonal tale, reflecting nature's rhythm from deep winter to the cusp of the next cycle. Here's a luminous guide to the traditional names and their essence.

🌕 Wolf Moon (January)

Kicks off the year with echoes of wolf packs calling through the frozen wilds—symbolizing endurance, pack loyalty, and clever survival in the harshest cold.

🌕 Snow Moon (February)

Blankets the landscape in stillness and deep drifts—a quiet call to conserve energy, embrace introspection, and trust that warmth will return.

🌕 Worm Moon (March)

Signals the underground stir as worms rework the soil, drawing robins and early gardeners alike—the earth's first lively exhale after winter's long sleep.

🌕 Pink Moon (April)

Showcases the soft pink spread of phlox across meadows—bursting with fresh color, hope, and the joyful unfurling of new growth.

🌕 Flower Moon (May)

Lights up a riot of blossoms everywhere—celebrating peak fertility, abundance, and nature's most vibrant display of life.

🌕 Strawberry Moon (June)

Aligns with the ripe, ruby harvest of wild strawberries—a sweet invitation to savor simple joys and the earth's generous gifts.

🌕 Buck Moon (July)

Named for bucks sprouting new velvet antlers—embodying vigorous growth, summer thunder, and the pulse of peak vitality.

🌕 Sturgeon Moon (August)

Named for the giant lake sturgeon of the Great Lakes—marking summer's last full Moon and, in some years, a coinciding lunar eclipse.

🌕 Corn Moon (September) ← You Are Here

Named for the ripening corn harvest—autumn's opening Moon, and in most years, also the Harvest Moon closest to the equinox.

🌕 Harvest Moon (Late September/October)

The closest full moon to the autumn equinox, bathing fields in extra light for late harvesting—a gentle bridge into shorter days. Most years this title belongs to the Corn Moon; some years it shifts to October's full Moon.

🌕 Hunter's Moon (October)

Reveals game in cleared fields under crisp skies—time to prepare stores for winter, blending strategy with gratitude for the hunt.

🌕 Beaver Moon (November)

Watches beavers rush to fortify dams before ice sets in—a moon of diligent preparation and cozying up against approaching cold.

🌕 Cold Moon (December)

Rises amid the year's longest nights over a quiet, frosted world—inviting reflection, rest, and quiet hope for the light's return.

Frequently Asked Questions

What is the Corn Moon?

The Corn Moon is a traditional name for the full moon in September, marking the point when corn ripens and is ready for harvest across much of North America. Different Indigenous peoples of North America recorded their own versions of the name, including the Western Abenaki (Corn Maker Moon) and Dakota (Corn Harvest Moon).

When is the Corn Moon?

The Corn Moon falls once a year, sometime in September, but the exact date and peak time shift from year to year because the ~29.5-day lunar cycle doesn't divide evenly into the calendar year. Check a current Moon phase calendar for the precise date in a given year.

Is the Corn Moon also the Harvest Moon?

Usually, yes. The Harvest Moon title goes to whichever full Moon falls closest to the autumnal equinox, which lands around September 22–23 each year. Since the Corn Moon is September's full Moon, it carries the Harvest Moon title most years. In about one year out of every three, that title shifts to October's full Moon instead.

Why is the September full moon called the Corn Moon?

The name comes from the timing of the corn harvest, which ripens in many parts of North America right around this full Moon. Different nations used their own variations on the name, since corn was a central crop for many and the full Moon marked the natural deadline for gathering it before frost.

What are other names for the Corn Moon?

September's full moon is also known as the Corn Maker Moon and Corn Harvest Moon (for the ripening corn crop), the Barley Moon and Wine Moon (for grain and grape harvests), the Falling Leaves Moon and Nut Moon (for early autumn changes), and the Singing Moon and Snow Goose Moon (for late-summer insect choruses and early goose migration).

Is the Corn Moon a Supermoon?

It depends on the year. The Corn Moon only counts as a supermoon when it happens to fall near perigee, the Moon's closest approach to Earth in its orbit; most years it falls at a fairly typical distance and isn't classified as a supermoon or micromoon.

What is the "Harvest Moon effect" on moonrise times?

Around the autumnal equinox, the Moon's path meets the horizon at a shallow angle, so the nightly moonrise delay shrinks from the usual ~50 minutes to roughly 25–35 minutes for several nights in a row (strongest between about 40–60°N latitude). This gives several evenings of near-full moonlight arriving right around sunset — historically useful for farmers finishing the harvest after dark.

Why doesn't the Corn Moon always occur on the same date?

The lunar cycle runs about 29.5 days, which doesn't divide evenly into a 365-day calendar year. That mismatch means each full Moon drifts roughly 11 days earlier from one year to the next, until an extra full Moon (a Blue Moon) resets the pattern — which is why the Corn Moon can fall as early as September 1 or as late as September 30 depending on the year.

Why is it sometimes called the Harvest Moon instead of the Corn Moon?

"Corn Moon" is simply the traditional name for September's full Moon. "Harvest Moon" is a separate, astronomically defined title given each year to whichever full Moon — September's or October's — falls closest to the autumnal equinox. Most years that's the Corn Moon, so the two names get used interchangeably, but they aren't technically the same thing.

Does the Corn Moon look yellow or orange?

It can, especially near moonrise and moonset. When the Moon sits low on the horizon, its light passes through much more of Earth's atmosphere than when it's overhead, scattering away more blue wavelengths and letting warmer yellow and amber tones through — the same effect responsible for colorful sunsets.

Does the Corn Moon look larger than usual?

It can appear larger near the horizon, but that's the Moon illusion — an optical effect from your brain comparing it to foreground objects like trees and buildings — not an actual change in the Moon's size. Its true angular size barely changes over the course of a night.

Can the Corn Moon be in October?

No — the Corn Moon is traditionally September's full Moon by definition. What can shift to October is the separate Harvest Moon title: roughly one year in three, the full Moon closest to the equinox turns out to be October's rather than September's.

Why does the Harvest Moon rise so close to sunset?

Two effects stack together: a full Moon is, by definition, opposite the Sun in the sky, so it always rises around sunset — and near the equinox, the Moon's orbital geometry against the horizon shortens the normal night-to-night rise delay. Together, that means the Harvest Moon rises near sunset on several evenings in a row, not just once.

Corn Moon – Full Moon of September