Lunation Calendar · — Deep Dives · — Lunation Names

A Moon, not a night

Modern almanacs often present a name beside the date of a Full Moon, as though it were a nickname for that one night. In a lunar calendar, however, a named moon can mean a lunar month: a span of the seasonal year. The Full Moon is its most conspicuous moment, but the name can hold the cycle around it.

The Lunation Calendar restores that broader sense. It defines a lunation as the cycle from one New Moon to the next, then names the whole lunation for the Full Moon that occurs within it. This is why the charts use lunation name rather than Full Moon name.

A tradition made of traditions

Indigenous peoples across North America developed many distinct lunar and seasonal calendars, shaped by their own languages, homelands, foodways, and ceremonial lives. One calendar might attend to freezing rivers, another to spawning fish, ripening berries, migrating animals, or the time for a particular harvest. The names and divisions of the year were not uniform, nor were they necessarily attached to Gregorian months.

The familiar English sequence is therefore better understood as a North American almanac tradition than as a single Indigenous calendar. It gathers names attributed to several Indigenous traditions—especially those of the Northeastern Woodlands—alongside colonial American and European names. Translation, compilation, and popular retelling have made the exact history of many individual names difficult to trace.

Related English-language compilations were circulating by the early twentieth century. Daniel Carter Beard published a synthesized set of “Indian Month Names” in 1918; the Maine Farmers’ Almanac printed another seasonal list in 1937; and later almanacs helped standardize the names now common in popular culture. The names are traditional, but the tradition is composite.

These names do not constitute a universal Indigenous calendar. Indigenous nations have their own lunar calendars, names, languages, and seasonal systems. The Lunation Calendar uses one inherited English-language folk sequence and identifies the choices it makes within that sequence.

A year of seasonal images

The calendar begins with a baseline name for each Gregorian month. These brief glosses describe the seasonal images carried by the modern English names; they are not claims that every name has one certain origin or belongs to one shared source tradition.

• Wolf Moon — wolves heard in the depths of the northern winter.
• Snow Moon — the snowy heart of winter.
• Crow Moon — the returning calls of crows near winter’s end.
• Pink Moon — early-blooming moss pink, not the Moon’s color.
• Flower Moon — the abundance of flowers in late spring.
• Strawberry Moon — the brief early-summer strawberry harvest.
• Buck Moon — the season when bucks’ new antlers are growing.
• Sturgeon Moon — a season associated with abundant sturgeon fishing around the Great Lakes.
• Corn Moon — corn ripening toward the end of summer.
• Hunter’s Moon — the hunting season that follows the harvest.
• Beaver Moon — associated with beavers preparing for winter and with the trapping season.
• Cold Moon — the return of deep winter.

This sequence carries the ecology of the northern seasonal year. Its images will not describe every climate or every place equally well; that local specificity is part of what seasonal naming means.

How the Calendar assigns a name

Each lunation receives the name conventionally assigned to the Full Moon occurring within it. The baseline name comes from the Gregorian month containing that Full Moon in the chart location’s local time: January gives Wolf, February Snow, March Crow, and so on. A lunation may begin in the preceding Gregorian month or end in the next; its Full Moon remains the naming anchor.

This is a modern mapping convention. It joins a New-Moon-to-New-Moon chart to an almanac tradition usually organized by the Gregorian month of the Full Moon; it does not claim to reconstruct the boundaries of any source culture’s lunar months. Because the assignment uses local civil time, a Full Moon very near a month boundary can receive a different baseline name in another time zone. The Location Deep Dive explains how one astronomical instant acquires different local dates.

Names that move

The Harvest Moon is not fixed to September. It is the Full Moon closest to the September equinox, so it can fall in September or October; its early-evening light traditionally extended work after sunset during the harvest. The following Full Moon becomes the Hunter’s Moon. Corn is the baseline September name, allowing Harvest and Hunter’s to move with the equinox rather than with a fixed Gregorian month.

A solar year contains about 12⅓ lunations. When two Full Moons fall within the same local Gregorian month, the second is named the Blue Moon. In the chart’s sequence, Blue acts like an intercalary label: it names the leap lunation that the twelve baseline month names cannot accommodate. If Blue coincides with another naming rule, Blue is the name shown.

The named year

The Year Chart follows the naming cycle rather than the Gregorian year. Its annual cycle of lunations begins at the New Moon that opens a Wolf Moon lunation and ends at the New Moon that opens the next. Depending on the year, that span contains twelve or thirteen named lunations.

Around the Year Chart, the Lunation Names Band gives each complete New-Moon-to-New-Moon span its name. On an individual Lunation Chart, the Lunation Name identifies the cycle by the Full Moon within it. The same names therefore work at two scales: they organize the year into lunar chapters and connect each chapter to its own detailed chart.