On September 26, 2026, the Moon is in the first day of the full moon phase and is fully visible. According to data from the National Meteorological Institute (Inmet), a complete calendar of lunar phases for this month has been provided.
The cycle of lunar phases in September 2026 began on the 4th with the waning Moon phase at 04:52 Brazilian time. The New Moon occurred on the 11th at 00:27. The waxing Moon appeared on the 18th at 17:44, and the Full Moon, which takes place this Saturday (the 26th), is expected at 13:50.
Lunation, or the lunar cycle, is the period between new moons and has an average duration of 29.5 days. During this period, the Moon goes through four main phases: new moon, waxing, full moon, and waning. Each of these phases lasts approximately seven days.
There are also so-called 'intermediate phases': the waxing crescent and waxing gibbous, which are observed between the new moon and the full moon; as well as the waning gibbous and waning quarter between the full moon and the new moon.
Description of Lunar Phases
During the New Moon, the satellite is located between the Earth and the Sun. This results in the illuminated side of the Moon facing the Sun, and the dark side facing us. Because of this, the Moon is not visible in the night sky. This phase marks the beginning of a new lunar cycle and is associated with rebirth and new opportunities.
Following the New Moon is the Waxing Moon phase. Gradually, a small illuminated strip begins to appear in the sky, which increases every night. Initially, only a thin ray of light is visible, but as the days pass, the illuminated part grows until half of the Moon becomes visible—this is called the Waxing Quarter. This phase symbolizes growth, development, and building new paths.
In the Full Moon phase, the Earth is located between the Sun and the Moon. This allows the side of the Moon facing us to receive full light, making it completely visible and bright in the sky. This is a period of maximum light intensity, when the Moon rises over the horizon exactly at sunset. The Full Moon is associated with completeness, the culmination of processes, and peak energy.
After the Full Moon, the Moon's light gradually begins to fade. Every night, we see less and less illuminated surface. When only half is visible, the Waning Quarter occurs, which is the opposite of the Waxing Quarter. The Moon continues to lose brightness until it reaches the New Moon again, restarting the cycle. The waning phase symbolizes reflection, completion, and preparation for new beginnings.
Today, the Moon is in the Full Moon phase.