Maio of 2026 reserves two full moons. The first occurs on the 1st. The second, on the 31st, is named Lua Azul.
The phenomenon happens because the lunar cycle lasts about 29.5 days. Meses with 30 or 31 days sometimes allows two full phases to fit into the same period. The expression “once in a blue moon” comes from there. The event does not change the actual color of the satellite.
Lua of Flores opens the month
The May 1st full moon is known as Lua das Flores. The traditional name is linked to the period of intense flowering in the spring of the northern hemisphere. No Brasil, observers also follow the event in the night sky.
The phase reaches its peak at around 5:23 pm Greenwich time, which corresponds to the late afternoon or early evening in much of the country. The moon appears full during the night of April 30th and May 1st. Quem follows the sky and notices the strong glow against the dark background.
Astrônomos record that the calendar Lua Azul appears every two to three years on average. The interval varies depending on the alignment between the Gregorian calendar and the lunar cycle. Depois from May 2026, the next one takes place in December 2028.
What defines an Lua Azul
The most common definition points to the second full moon within the same calendar month. Outra, less frequent, considers the third flood in a season with four. In the case of May 2026, the first rule applies.
- Lua does not get a royal blue tone
- The name comes from the rarity of the event
- The satellite maintains its usual appearance, with a yellowish or whitish glow
- Fatores atmospheric conditions may slightly alter color perception
- The distance to Terra on this occasion makes Lua a micromoon, that is, slightly smaller in the sky
Especialistas explain that the 29.5 day cycle makes the full moon “advance” on the calendar. Quando the month begins right after a flood, there is room for another at the end.
Calendário full lunar 2026
Maio concentrates the two initial floods. Depois other traditional dates come throughout the year. Cada one carries nicknames linked to seasons, harvests or behaviors of nature.
- Lua from Flores — May 1st
- Lua Azul — May 31
- Lua by Morango — June 29
- Lua from Veado — July 29
- Lua from Esturjão — August 28
- Lua by Colheita — September 26
- Lua from Caçador — October 26
- Lua from Castor — November 24
- Lua Fria — December 24
Algumas of these phases coincide with eclipses or other special conditions. In July, for example, there is a record of a partial lunar eclipse.
Como observe event on Brasil
Lua Azul on May 31st peaks at around 5:45 am Brasília time. The moon appears practically full on the night of the 30th and throughout the day on the 31st. Observadores in urban areas can see the glow even with moderate light pollution.
Quem has binoculars or a small telescope to note surface details. Astronomy Aplicativos helps locate the exact position in the sky according to the time and city. The moon rises in the east after sunset and moves west until dawn.
The phase coincides with the sign of Sagitário in some astrological references, but the astronomical aspect is independent of this. The important thing is the Sol-Earth-Moon alignment that generates the total illumination of the lunar disk.
Diferença between micromoon and supermoon
May Nesta Lua Azul, Lua is close to apogee, the furthest point in orbit from Terra. Therefore, it is classified as a micromoon. The apparent diameter is about 7% smaller than an average full moon.
In contrast, supermoons occur when the flood occurs near perigee. The visual effect is of a slightly larger disc. In 2026, the year brings a mixture of both types throughout the months.
Astrônomos follows these details to study variations in the lunar orbit. The general public takes the opportunity to take photos or simply admire the natural spectacle.
Próximos lunar events after May
Quem missed May 31’s Lua Azul may target Morango’s Lua in June. The sequence continues with traditional names that mark the progression of the seasons. In September and October, the harvest and hunter moons come into prominence because of their alignment with the equinox and changes in day length.
The year 2026 records 13 full moons in total. The extra number arises precisely because of months like May, which accommodate two phases.
The phenomenon reinforces the growing interest in celestial observation. Grupos of amateur astronomy organize public sessions in parks and squares to follow these dates. Mesmo without equipment, just look up on clear nights.
Lua Azul ends May with a simple reminder. The sky offers predictable but not always common events. Basta pay attention to the calendar so as not to miss the next one.