Flower Moon: origin of the name, symbolism and May full moon
The Flower Moon is the May full moon in the almanacs. Origin of the name, Milk Moon, Beltane, lily of the valley and the Ice Saints, two full moons in May 2026, simple gestures.
Key points
| Month | May (northern hemisphere) |
|---|---|
| English name | Flower Moon |
| Origin of the name | The abundance of flowers in spring, according to the Old Farmer's Almanac |
| Other names cited | Milk Moon, Planting Moon, Budding Moon, Spawning Moon |
| Approximate dates | 1 May 2026 (and a second full moon on 31 May); 20 May 2027 |
| Curiosity | 31 May 2026 is a “blue moon” (second full moon of the month) |
The full moon of full spring
The Flower Moon is the name for the May full moon. The name is transparent: in May, everything flowers, from hawthorn to elder, from meadows to gardens. It is one seasonal nickname among others, with no definition in astronomy. South of the equator, May is an autumn month: the Moon is the same, but the name no longer matches the season.
Where does this name come from?
The Old Farmer's Almanac gives for May the simple reason of abundant flowers. It lists other names, linked to different nations: Budding Moon, Spawning Moon (Cree), Planting Moon (Dakota, Lakota), Moon When the Ponies Shed Their Hair (Oglala). Each of these names refers to a fact of everyday life: planting, feeding, giving birth. They do not form a coherent system.
Another very widespread name, the Milk Moon, appears in the Maine Farmers' Almanac of 1937 among the names inherited from the English. It has an old echo: in the eighth century, Bede the Venerable explained that the Anglo-Saxon month of May was called Thrimilchi, because cows were then milked three times a day on fresh grass. The idea of a “milky” full moon therefore comes from a farming fact, not from the colour of the Moon.
Two full moons in May 2026
May 2026 has two full moons: on 1 May (around 7 p.m., Paris time) and on 31 May (around 10:45 a.m.). In North American usage, the first bears the name Flower Moon, and the second is a calendar “blue moon”. In 2027, there is only one, on 20 May: it will instead be the third of four full moons in a single astronomical spring (20 March to 21 June), which makes it a blue moon in the older, seasonal sense.
| Year | May full moon (Paris time) |
|---|---|
| 2026 | 1 May, around 7 p.m.; 31 May, around 10:45 a.m. |
| 2027 | 20 May, around 1 p.m. |
Approximate calculation to within a few minutes; check against an ephemeris before organising anything.
May traditions in Europe
May has been a month of festivals for a long time. On 1 May, the Irish celebrated Bealtaine (see Beltane): medieval texts describe livestock being driven between two fires to protect them. In France, 1 May is the day of lily of the valley, which tradition says was offered by King Charles IX in 1561, and also Labour Day. In many villages, a May tree was planted.
The saying of the Ice Saints (Mamertus, Pancras and Servatius, from 11 to 13 May) warns of a return of the cold. It rests on the observation of late frosts, but does not hold true every year. In Buddhism, the festival of Vesak, which marks the birth, enlightenment and death of the Buddha, is celebrated on the full moon of the month of Vesakha, often in May.
A safety reminder: lily of the valley is a highly toxic plant (heart, digestive tract), for children as for animals. Do not put it in water that someone might drink, and wash your hands after handling it.
The May sky
In May, the full moon is low: it culminates at about 20 to 26 degrees above the horizon in Paris. The day lasts fifteen hours or more and the nights are short; twilight lingers, and the Moon shows late in the evening. It is still very bright, and it outshines the faintest stars.
Flower Moon and lunar gardening
Many gardeners follow a lunar calendar to sow or harvest, either out of popular tradition or in the line of biodynamic practice. We have not found an independent review that demonstrates an effect of the Moon on sowing. What matters for plants is soil temperature, moisture, light and the risk of frost. May is a month when these conditions come together, which partly explains this moon's reputation. You may follow the Moon for pleasure, without fearing that you will miss your sowing if you prefer to rely on the weather.
Symbolism and simple gestures
In modern practices, the Flower Moon is associated with the fertility of the earth, joy, flourishing and the care given to what grows. These are images; they do not rest on proof.
- Take a botanical walk: learn to recognise three wild flowers. Do not pick protected species, and leave some for the insects.
- Arrange a simple bouquet, without lilies (toxic to cats) or lily of the valley if children or animals live with you.
- Prepare a picnic for moonrise.
- Decorate a small seasonal altar with flowers of the season in a glass of water.
Frequently asked questions
Why “Flower Moon”?
Because, in the northern hemisphere, May is the month of flowering. The Old Farmer's Almanac gives the name as a simple, transparent one.
What is the difference from the Milk Moon?
They are two names for the same May full moon. The Milk Moon evokes farming: cows were milked three times a day in spring, according to Bede.
Can there be two Flower Moons?
Yes: in 2026, May has two full moons (1 and 31 May). The first bears the name; the second is called a blue moon in the calendar sense.
What is the link with Beltane?
Beltane is the festival of 1 May. It is not tied to the full moon: its date is fixed. The two sometimes fall in the same week.
Should I give lily of the valley on 1 May?
It is the custom, but the plant is toxic. Keep it out of reach of children and animals.
Also read
The meanings mentioned belong to tradition and symbolism. They are neither promises of results nor medical advice. Back to The Wheel of the Year.